CN114753827A - Oil testing method and oil testing tubular column - Google Patents
Oil testing method and oil testing tubular column Download PDFInfo
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- CN114753827A CN114753827A CN202110039039.4A CN202110039039A CN114753827A CN 114753827 A CN114753827 A CN 114753827A CN 202110039039 A CN202110039039 A CN 202110039039A CN 114753827 A CN114753827 A CN 114753827A
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- 238000012360 testing method Methods 0.000 title claims abstract description 385
- 238000000034 method Methods 0.000 claims abstract description 24
- 230000002147 killing effect Effects 0.000 claims abstract description 10
- 230000002441 reversible effect Effects 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 5
- 238000010998 test method Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 abstract description 14
- 239000003921 oil Substances 0.000 description 260
- 239000010410 layer Substances 0.000 description 89
- 230000015572 biosynthetic process Effects 0.000 description 14
- 238000005070 sampling Methods 0.000 description 13
- 238000012856 packing Methods 0.000 description 11
- 230000001681 protective effect Effects 0.000 description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 8
- 235000017491 Bambusa tulda Nutrition 0.000 description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 8
- 230000002829 reductive effect Effects 0.000 description 8
- 241001330002 Bambuseae Species 0.000 description 7
- 239000011425 bamboo Substances 0.000 description 7
- 238000005259 measurement Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 210000004907 gland Anatomy 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 241000209128 Bambusa Species 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012854 evaluation process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
- E21B49/08—Obtaining fluid samples or testing fluids, in boreholes or wells
- E21B49/087—Well testing, e.g. testing for reservoir productivity or formation parameters
- E21B49/088—Well testing, e.g. testing for reservoir productivity or formation parameters combined with sampling
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- Fluid Mechanics (AREA)
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention provides an oil testing method and an oil testing tubular column. The oil testing method comprises the following steps: putting a perforating gun into the sleeve, and perforating a plurality of preset oil testing layers; taking out the perforating gun, putting the oil testing pipe column into the sleeve, and aligning a plurality of electric control testing barrels of the oil testing pipe column with a plurality of oil testing layers; the oil testing pipe column separates and seals a plurality of oil testing layers; the oil testing pipe column respectively tests a plurality of oil testing layers; performing reverse circulation well killing on the oil testing pipe column; and taking out the oil testing pipe column. The invention solves the problems of multiple procedures and high risk in the pilot oil process in the prior art.
Description
Technical Field
The invention relates to the technical field of oil testing of evaluation wells, in particular to an oil testing method and an oil testing tubular column.
Background
In the exploration and evaluation process of oil and gas fields, because the oil and gas properties and the productivity of each reservoir are unknown, the existing oil testing process completely adopts layer-by-layer upward return or downward return oil testing, namely, independent oil testing and production testing are carried out on each layer, so that the properties and the productivity of each reservoir fluid are realized, and data support is provided for subsequent development and evaluation (only upward return oil testing is introduced in detail). And after the oil testing of the S1 layer is finished, injecting 5-10 m of ash after closing the lower bridge plug of the perforation layer section, and then performing the oil testing operation of the previous layer (returning upwards) (repeating the oil testing step of the S1 layer).
For exploration wells and evaluation wells, because the fluid properties and productivity of each layer are unknown, each layer needs to be independently tested for oil to achieve the reservoir fluid properties and productivity, for example, after drilling, coring and logging interpretation, two layers are found to be better displayed and possibly contain industrial oil flow, and two layers need to be tested for oil to achieve the fluid properties and productivity. The two layers are respectively defined as an S1 layer and an S2 layer from bottom to top, oil testing is firstly carried out on the S1 layer, and the single-layer conventional oil testing process comprises the following steps:
1) deepening the shaft bottom by using an oil pipe structure;
2) the oil pipe structure is used for transmitting perforation, and an S1 layer is shot and broken;
3) lowering a fracturing string and withdrawing liquid for production;
4) measuring the temperature and the flow pressure of the produced layer and the pressure and the temperature gradient along the shaft by a lower steel wire vehicle;
5) carrying out underground PVT sampling by using a steel wire vehicle lower sampler;
6) the bridge plug under the tubing structure closes the S1 layer.
After the completion of the sealing, the oil testing operation of the S2 layer is performed (the operation procedure of S1 is repeated), and finally, the bridge plug is drilled off to perform the oil well production. The operation enables each layer of oil testing operation to be carried out on the well bottom detection, the oil pipe structure transmission perforation, the fracturing string descending, the pressure gradient measurement, the pressure recovery and the PVT sampling in the well, meanwhile, the bridge plug must descend before going back to the top to seal the stratum, and after the oil testing is finished, the bridge plug is drilled and removed by the continuous oil pipe structure, so that the operation procedures are multiple (relating to the oil pipe structure and steel wire operation under the condition of taking the oil pipe, and the like), the time and the labor are wasted, the cost is high, the repeated and frequent operation is carried out, and the well control risk is high.
That is to say, the problem that the process of trying oil among the prior art has many processes, the risk is big.
Disclosure of Invention
The invention mainly aims to provide an oil testing method and an oil testing tubular column, and aims to solve the problems of multiple working procedures and high risk in the oil testing process in the prior art.
In order to achieve the above object, according to an aspect of the present invention, there is provided a test method comprising the steps of: putting a perforating gun into the sleeve, and perforating a plurality of preset oil testing layers; taking out the perforating gun, putting the oil testing pipe column into the sleeve, and aligning a plurality of electric control testing barrels of the oil testing pipe column with a plurality of oil testing layers; the oil testing pipe column separates and seals a plurality of oil testing layers; the oil testing pipe column respectively tests a plurality of oil testing layers; performing reverse circulation well killing on the oil testing pipe column; and taking out the oil testing pipe column.
Further, the step of separating and sealing the plurality of oil testing layers by the oil testing pipe column comprises the following steps: the ground control box closes a plurality of electric control test cylinders of the oil testing pipe column to isolate the sleeve from the oil pipe structure; and (3) pressurizing the oil pipe structure, and expanding a plurality of packers on the oil pipe structure and abutting and sealing the sleeves so that the area between the adjacent sleeves and the oil pipe structure is divided into a plurality of independent test sections by the packers.
Further, the step of respectively testing a plurality of oil testing layers by the oil testing pipe column comprises the following steps: step S1; the ground control box opens one of the electric control test cylinders; step S2: if the oil layer corresponding to the opened electric control test cylinder produces oil, executing the step S3, and if the corresponding oil layer does not produce oil, skipping the step S3 and directly executing the step S4; step S3: performing unstable well testing on an oil testing layer corresponding to the opened electric control testing cylinder; step S4: after fracturing the oil testing layer corresponding to the opened electronic control testing cylinder, performing unstable well testing on the oil testing layer corresponding to the opened electronic control testing cylinder; and repeating the step S1 to the step S4, and performing oil testing on different oil testing layers until the oil testing of all the oil testing layers is completed.
Further, in the unstable well testing of the oil testing layer corresponding to the opened electric control testing cylinder, the size of the ground oil nozzle is changed, and the flow temperature and the flow pressure of oil are recorded by the electric control testing cylinder.
Further, in the unstable well testing of the oil testing layer corresponding to the opened electric control testing cylinder, the opened electric control testing cylinder is closed, and the pressure recovery testing is carried out on the oil testing layer.
Furthermore, in the unstable well testing of the oil testing layer corresponding to the opened electric control testing cylinder, after the electric control testing cylinder is closed, the oil retained in the electric control testing cylinder is sampled.
Further, the reverse circulation well killing of the test oil pipe column comprises the following steps: and the ground control box closes all the electric control testing cylinders, opens a counter-pressure well valve of the oil testing pipe column, and leads fluid into the oil pipe structure through the counter-pressure well valve.
Further, in the process of taking out the test oil pipe column, if the density in the oil pipe structure is equal to the density in the sleeve, the test oil pipe column is taken out.
According to another aspect of the present invention, there is provided a testing string, wherein the testing method is applied to the testing string, and the testing string comprises: an oil pipe structure; the electronic control test cylinders are arranged on the oil pipe structure in a spaced manner and are communicated with the inside of the oil pipe structure; a plurality of packers are arranged, the packers are sleeved on the oil pipe structure, and one packer is arranged between every two adjacent electric control testing cylinders; and a cable of the ground control box penetrates through the packer to be electrically connected with each electric control testing cylinder.
Furthermore, the oil testing pipe column further comprises a counter-pressure well valve, the counter-pressure well valve is arranged above all the packers, the oil pipe structure is provided with a plurality of oil pipes, the oil pipes are sequentially connected to form the oil pipe structure, at least the oil pipe below the counter-pressure well valve is provided with a central oil hole and an offset hole, the electric control testing cylinder is communicated with the central oil hole, and a cable penetrates into the offset hole and is electrically connected with the electric control testing cylinder.
By applying the technical scheme of the invention, the oil testing method comprises the following steps: putting a perforating gun into the sleeve, and perforating a plurality of preset oil testing layers; taking out the perforating gun, putting the oil testing tubular column into the sleeve, and aligning a plurality of electric control testing barrels of the oil testing tubular column with a plurality of oil testing layers; the oil testing pipe column separates and seals a plurality of oil testing layers; the oil testing pipe column respectively tests oil of a plurality of oil testing layers; performing reverse circulation well killing on the oil testing pipe column; and taking out the oil testing pipe column.
The perforating gun is placed into the sleeve and simultaneously perforates a plurality of oil testing layers, perforating efficiency is improved, the perforating gun is prevented from repeatedly extending into the sleeve, and working time and working strength of operators can be reduced. Put into the sleeve with the oil testing tubular column, guarantee a plurality of automatically controlled test section of thick bamboo and a plurality of oil testing layer one-to-one simultaneously and align to make a plurality of automatically controlled test section of thick bamboos can correspond rather than the oil testing layer that corresponds, in order to control the oil of oil testing layer output and enter into the oil pipe structure through the automatically controlled test section of thick bamboo that corresponds. The oil testing pipe column separates and seals a plurality of oil testing layers, so that the oil testing layers are independent from each other, and oil testing is performed on each layer of oil testing layer independently. The oil testing pipe column tests oil for a plurality of oil testing layers respectively, and the oil testing pipe column does not need to be repeatedly drawn out when the oil testing is carried out respectively, so that the operation procedures are greatly reduced, the operation of oil field perforation is reduced, and the safety of work in an oil field is increased. Carry out reverse circulation killing to the oil test string for pressure in the oil pipe structure is the same with the pressure in the sleeve, can effectively avoid the condition that appears the oil spout when taking out the oil test string, greatly increased the security of oil test.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 illustrates the positional relationship of a perforating gun of an alternative embodiment of the present invention with a test zone; and
FIG. 2 illustrates the positional relationship of a test string to a test zone in accordance with an alternative embodiment of the present invention;
FIG. 3 is a schematic diagram of the electrically controlled test cartridge of FIG. 2;
FIG. 4 is a schematic diagram of the electrically controlled test cartridge of FIG. 2 with the central valve in a closed position;
FIG. 5 is a schematic diagram of the electrical connector lug of the electrically controlled test cartridge of FIG. 2;
fig. 6 shows a schematic view of the construction of the side valve of the electrically controlled test cartridge of fig. 2.
Wherein the figures include the following reference numerals:
10. a perforating gun; 20. a sleeve; 30. testing an oil layer; 40. testing the oil pipe column; 41. an electrically controlled test cartridge; 411. a barrel; 4111. a main body portion; 4112. a first joint; 4113. a second joint; 412. a central valve; 413. a lateral valve; 4131. an inner sleeve of the sliding sleeve; 4132. laterally sealing; 4133. protecting the sliding sleeve; 4134. a return spring; 414. a sampling structure; 415. a drive structure; 4151. a first driving section; 4152. a second driving section; 4153. a third driving section; 42. an oil pipe structure; 43. a packer; 44. a back-pressure well valve; 50. a ground control box; 60. a connector lug; 61. an electric wire; 62. protecting the tube; 63. a filler; 64. a sealing structure; 641. sealing and filling; 642. a first locking device; 643. pressing a cap by filling; 644. a second locking device; 70. a measurement and control circuit board; 80. a direct-reading pressure gauge; 90. a storage type electronic pressure gauge.
Detailed Description
It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.
The invention provides an oil testing method and an oil testing tubular column, aiming at solving the problems of multiple working procedures and high risk in the oil testing process in the prior art.
As shown in fig. 1 to 6, the oil testing method includes the following steps: putting the perforating gun 10 into the sleeve 20, and perforating a plurality of preset oil testing layers 30; taking out the perforating gun 10, putting the test oil string 40 into the sleeve 20, and aligning a plurality of electric control test cartridges 41 of the test oil string 40 with a plurality of test oil layers 30; the test oil pipe column 40 separates and seals the plurality of test oil layers 30; the oil testing pipe column 40 respectively tests the oil testing layers 30; performing reverse circulation well killing on the test oil pipe column 40; the test string 40 is removed.
The perforating gun 10 is placed into the sleeve 20 to perforate a plurality of oil test layers 30 simultaneously, so that perforating efficiency is improved, the perforating gun 10 is prevented from repeatedly extending into the sleeve 20, and the working time and the working strength of operators can be reduced. The test oil pipe column 40 is placed into the sleeve 20, and meanwhile, the plurality of electronic control test cylinders 41 are aligned with the plurality of oil testing layers 30 one by one, so that the plurality of electronic control test cylinders 41 can correspond to the corresponding test oil layers 30, and oil produced by the oil testing layers 30 is controlled to enter the oil pipe structure through the corresponding electronic control test cylinders 41. The formation testing string 40 separates and seals the plurality of formation testing layers 30, so that the plurality of formation testing layers 30 are independent of each other, and thus, formation testing can be performed on each formation testing layer 30 independently. The oil testing pipe column 40 respectively tests the oil of the oil testing layers 30, and the oil testing pipe column 40 does not need to be repeatedly drawn out when the oil testing is carried out respectively, so that the operation procedures are greatly reduced, the operation of perforating the oil field is reduced, and the safety of working in the oil field is improved. The well killing is carried out on the test oil pipe column 40 in a reverse circulation mode, so that the pressure in the oil pipe structure 42 is the same as the pressure in the sleeve 20 and is greater than the formation pressure, the condition of oil injection when the test oil pipe column 40 is drawn out can be effectively avoided, and the safety of the test oil is greatly improved.
Specifically, the step of separating and sealing the plurality of oil testing layers 30 by the oil testing string 40 includes the following steps: the surface control box 50 closes the plurality of electrically controlled test cartridges 41 of the test string 40 to isolate the sleeve 20 from the tubing structure 42; the tubing structure 42 is pressurized and a plurality of packers 43 on the tubing structure 42 are inflated and sealed against the sleeves 20 so that the area between adjacent sleeves 20 and tubing structure 42 is divided into a plurality of separate test sections by packers 43. The ground control box 50 can operate the electric control test cylinder 41 at any time, and convenience in controlling the electric control test cylinder 41 is improved. The electric control test cylinder 41 is controlled by electric power, the electric control test cylinder 41 can be operated at any time, and the sealing and opening operations of the oil testing layer 30 can be controlled at any time, so that the oil testing process is simpler and more convenient. All the electric control test cylinders 41 on the test oil string 40 are closed, so that the oil pipe structure 42 and the sleeve 20 are independent from each other, the pressure in the oil pipe structure 42 is pressurized at the moment, the pressure in the oil pipe structure 42 is gradually increased, the packer 43 can expand under the pressure action of the oil pipe structure 42, and the pressurization in the oil pipe structure 42 is suspended when the packer 43 is abutted and sealed with the sleeve 20. At this time, the plurality of packers 43 divide the sleeve 20 into a plurality of independent testing sections, each testing section is provided with one electric control testing cylinder 41 and one oil testing layer 30, so that independent oil testing operation can be performed on each oil testing layer 30.
Specifically, the step of performing the oil testing on the plurality of oil testing layers 30 by the oil testing string 40 includes the following steps: step S1; the ground control box 50 opens one electric control test cylinder 41 in the plurality of electric control test cylinders 41; step S2: if the oil layer 30 corresponding to the opened electric control test cylinder 41 is out of oil, executing step S3, and if the corresponding oil layer 30 is not out of oil, directly executing step S4 by skipping step S3; step S3: performing unstable well testing on the oil testing layer 30 corresponding to the opened electric control testing cylinder 41; step S4: fracturing the oil testing layer 30 corresponding to the opened electric control testing cylinder 41, and performing unstable well testing on the oil testing layer 30 corresponding to the opened electric control testing cylinder 41; and repeating the steps S1 to S4, and performing oil testing on different oil testing layers 30 until the oil testing of all the oil testing layers 30 is completed. The setting can carry out the oil testing to arbitrary oil testing layer 30 like this, and need not to consider the position condition of oil testing layer 30, has increased the convenience of oil testing. And performing unstable well testing on the oil testing layer 30 after the oil testing layer 30 produces oil so as to test the oil production performance of each oil testing layer 30.
Specifically, in the unstable well testing of the oil testing layer 30 corresponding to the opened electric control testing cylinder 41, the size of the ground oil nozzle is changed, and the electric control testing cylinder 41 records the flowing temperature and the flowing pressure of the oil. Be provided with pressure sensor and temperature sensor in the automatically controlled test section of thick bamboo 41, pressure sensor and temperature sensor all are connected with ground control box 50 electricity, when changing ground glib talker and carry out unstable well testing to formation testing 30, pressure sensor measures the flowing pressure of the interior oil of oil pipe structure, temperature sensor measures the flowing temperature of the interior oil of oil pipe structure, and flowing temperature and flowing pressure reflect on ground control box 50 in real time, with real-time supervision flowing temperature and flowing pressure, guarantee the stability of formation testing environment, avoid producing the potential safety hazard.
Specifically, in the unstable well testing of the oil testing layer 30 corresponding to the opened electronic control testing cylinder 41, the opened electronic control testing cylinder 41 is closed, and the pressure recovery testing is performed on the oil testing layer 30. Logging data of the formation 30 is thus collected for subsequent operations on the formation 30.
Specifically, in the unstable well testing of the oil testing layer 30 corresponding to the opened electronic control testing cylinder 41, after the electronic control testing cylinder 41 is closed, the oil retained in the electronic control testing cylinder 41 is sampled. The inside sample structure that has of automatically controlled test section of thick bamboo 41, when automatically controlled test section of thick bamboo 41 was opened, oil flowed into oil pipe structure 42 through automatically controlled test section of thick bamboo 41 in, some oil flowed into the sample structure this moment, waits to close automatically controlled test section of thick bamboo 41 after, oil just remains in the sample structure. The oil samples of different oil test layers 30 can be taken from different electric control test cylinders 41, so that the separate sampling operation is reduced, the operation procedures are reduced, and the cost is saved.
Specifically, the reverse circulation killing of the test oil string 40 includes the following steps: the surface control box 50 closes all the electrically controlled test cartridges 41, opens the kill valve 44 of the test string 40, and injects fluid into the tubing structure 42 through the kill valve 44. After testing each layer of oil testing layer 30, the ground control box 50 closes all the electronic control testing cylinders 41, opens the counter-well valve 44 on the testing oil pipe column 40, and introduces high-density fluid into the oil pipe structure 42 through the counter-well valve 44 to increase the pressure in the oil pipe structure 42, so that the pressure in the sleeve 20 and the pressure in the oil pipe structure 42 are the same, and the density is the same, and meanwhile, the pressure at the counter-well valve 44 is greater than the pressure of the stratum, so as to prevent the oil from being sprayed out of the ground.
It should be noted that the function of the snubbing valve 44 is basically the same as that of the electronic control testing cylinder 41, but the snubbing valve 44 only has the switching function, but does not have the functions of downhole sampling, pressure measurement and the like, and is only used when the well is cyclically snubbed when the test oil string 40 is taken out.
Specifically, in the process of removing the test string 40, if the density in the tubing structure 42 is equal to the density in the casing 20, the test string 40 is removed. The test string 40 is removed when the density in the tubing structure 42 is equal to the density in the casing 20 by passing a high density fluid into the tubing structure 42 to increase the pressure and density in the tubing structure 42, and the pressure at the back-pressure valve 44 is made to be greater than the pressure in the formation to prevent the oil in the casing 20 from being ejected.
As shown in fig. 2, the above-mentioned oil testing method is applied to an oil testing string 40, the oil testing string 40 includes an oil pipe structure 42, a plurality of electrically controlled testing cylinders 41, a packer 43 and a ground control box 50, the plurality of electrically controlled testing cylinders 41 are sleeved on the oil pipe structure 42 at intervals, and the electrically controlled testing cylinders 41 are communicated with the inside of the oil pipe structure 42; a plurality of packers 43 are arranged, the packers 43 are sleeved on the oil pipe structure 42, and one packer 43 is arranged between every two adjacent electric control test cylinders 41; the cables of the surface control box 50 are electrically connected with each electrically controlled test cylinder 41 through the packer 43. The arrangement is such that only one electrically controlled test cartridge 41 is arranged between two adjacent packers 43, so that each test oil layer 30 can be subjected to independent test oil operation when the test oil string 40 is in operation. The cable of the surface control box 50 is electrically connected with each electrically controlled test cylinder 41 through the packer 43 so as to control each electrically controlled test cylinder 41.
Optionally, the test string 40 further includes a counter-pressure well valve 44, the counter-pressure well valve 44 is disposed above all the packers 43, the tubing structure 42 has a plurality of tubing pipes, the plurality of tubing pipes are sequentially connected to form the tubing structure 42, the tubing at least below the counter-pressure well valve 44 has a central oil hole and an offset hole, the electrically controlled testing cylinder 41 is communicated with the central oil hole, and a cable penetrates into the offset hole to be electrically connected with the electrically controlled testing cylinder 41. The central oilhole is because the flow of oil, and the setting in off-set hole is used for holding the cable to form the protection to the cable, guarantee the steady operation of formation testing string 40, still increased the security of formation testing string 40 work simultaneously.
As shown in fig. 3 and 4, the electronically controlled testing cartridge 41 includes a cartridge body 411, a central valve 412, a lateral valve 413, a sampling structure 414, and a drive structure 415. The both ends of barrel 411 communicate with the automatically controlled test cylinder 41 of difference respectively, and the circumference lateral wall that barrel 411 is close to ground one end have with the side direction through-hole of the inside intercommunication of barrel 411, and automatically controlled test cylinder 41 is still including setting up inside barrel 411 respectively: the center valve 412 is disposed at an end of the cylinder 411 far from the lateral through hole, and when the center valve 412 is closed, the center valve 412 partitions the inside of the cylinder 411 into two independent spaces respectively located at both sides of the center valve 412; a lateral valve 413 is provided at one end of the cylinder 411 near the lateral through hole, the lateral through hole communicates with the inside of the cylinder 411 when the lateral valve 413 is opened, and the lateral valve 413 seals the lateral through hole when the lateral valve 413 is closed; the sampling structure 414 is adjacent the lateral through-hole relative to the central valve 412; the driving structure 415 is disposed on the inner sidewall of the petroleum cylinder and is respectively connected with the central valve 412, the lateral valve 413 and the sampling structure 414 in a driving manner.
When using the intelligent oil testing working barrel of above-mentioned structure, when need carry out the oil testing to the oil reservoir of difference, only need to close the central valve 412 of the intelligent oil testing working barrel that corresponds the oil reservoir and open lateral valve 413, and open the central valve 412 of other intelligent oil testing working barrels and close lateral valve 413, the oil in the oil reservoir that only awaits the oil test like this can enter into the inside of barrel 411 by the lateral valve 413 of the intelligent oil testing working barrel that corresponds, and sample through sample structure 414 in order to accomplish the oil test. During this process, the opening and closing of the central valve 412, and the opening and closing of the lateral valves 413 are driven by the drive structure 415, while the sampling structure is also driven by the drive structure 415. Therefore, the intelligent oil testing working barrel effectively simplifies the oil testing process, and the problem that the oil testing process is complex in the prior art is effectively solved.
As shown in fig. 3, the barrel 411 includes a main body portion 4111, a first joint 4112, and a second joint 4113. The main body portion 4111 has a lateral through hole, and the central valve 412, the lateral valve 413, the sampling structure 414 and the driving structure 415 are all disposed inside the main body portion 4111; the first joint 4112 is connected to one end of the main body portion 4111, which is far away from the lateral through hole, and one end of the first joint 4112 extends into the main body portion 4111 and is connected to the center valve 412, when the center valve 412 is opened, the inside of the first joint 4112 is communicated with the inside of the main body portion 4111; the second joint 4113 is connected to an end of the main body 4111 away from the first joint 4112. Can guarantee effectively that intelligence formation testing working barrel can be connected with oil pipe structure more easily through setting up first joint 4112 and second joint 4113.
As shown in fig. 3 and 4, the driving structure 415 includes a first driving portion 4151, a second driving portion 4152 and a third driving portion 4153, the first driving portion 4151 is drivingly connected to the central valve 412, the second driving portion 4152 is drivingly connected to the lateral valve 413, the third driving portion 4153 is drivingly connected to the sampling structure 414, the driving structure 415 further includes two connector pins 60, and the two connector pins 60 are respectively disposed at two ends of the barrel 411 and are respectively electrically connected to the first driving portion 4151, the second driving portion 4152 and the third driving portion 4153. Through the arrangement, the driving structure 415 can be effectively ensured to respectively drive the central valve 412, the lateral valve 413 and the sampling structure 414, so that the service performance of the intelligent oil testing working barrel is effectively ensured.
As shown in fig. 5, one end of the connector lug 60 extends into the inside of the cylinder 411, the other end of the connector lug 60 is located outside the cylinder 411, and the connector lug 60 includes an electric wire 61, a protective tube 62, a packing 63, and a sealing structure 64. The protective tube 62 is sleeved outside the electric wire 61; the filler 63 is filled between the electric wire 61 and the protective tube 62; the seal structure 64 is fitted around the outside of the protection tube 62.
As shown in fig. 5, the sealing structure 64 includes at least one sealing packing 641, a first locking device 642, at least one packing pressing cap 643 and a second locking device 644, the first locking device 642 is sleeved on the outer side of the protection tube 62, and an accommodating space is provided between the first locking device 642 and the protection tube 62, and the sealing packing 641 is disposed in the accommodating space; the packing gland 643 corresponds to the packing 641 one by one, the packing gland 643 is arranged in the accommodating space, one end of the packing gland 643 abuts against the first locking device 642, and the other end of the packing gland 643 abuts against the packing 641; the second locking device 644 is sleeved on one end of the protection tube 62 far away from the cylinder 411, and one end of the sealing device close to the cylinder 411 is abutted with the first locking device 642. Through such an arrangement, the three-stage sealing structure 64 of the connector lug 60 can be realized, so that the liquid inlet of the connector lug 60 can be effectively prevented, and the short circuit of the connector lug 60 can be prevented.
As shown in fig. 6, the lateral valve 413 comprises a sleeve inner barrel 4131, a lateral seal 4132, a protective sleeve 4133, and a return spring 4134. The driving structure 415 is in driving connection with the sliding sleeve inner cylinder 4131 to drive the sliding sleeve inner cylinder 4131 to slide along the length direction of the cylinder 411; two sides of the lateral through hole are respectively provided with at least one lateral seal 4132, and the lateral seal 4132 is arranged between the sliding sleeve inner barrel 4131 and the barrel 411; when the lateral valve 413 is closed, one end of the protective sliding sleeve 4133 is abutted against the inner side wall of the cylinder 411, and the other end of the protective sliding sleeve 4133 is abutted against the sliding sleeve inner cylinder 4131; the return spring 4134 is disposed between the protective sliding sleeve 4133 and the cylinder 411, one end of the return spring 4134 abuts against the protective sliding sleeve 4133, the other end of the return spring 4134 abuts against the cylinder 411, and the length direction of the return spring 4134 is the same as the length direction of the cylinder 411. The lateral seals 4132 are effectively protected from the frac sand washout by the provision of the protective sleeve 4133 and the return spring 4134.
Specifically, the intelligent oil testing working barrel further comprises a pressure measuring structure, and the pressure measuring structure is arranged between the central valve 412 and the lateral valve 413.
Specifically, the pressure measuring structure includes a measurement and control circuit board 70, a direct-reading pressure gauge 80 and a storage type electronic pressure gauge 90, which are respectively arranged along the length direction of the cylinder 411, the measurement and control circuit board 70 is connected with the direct-reading pressure gauge 80, and the measurement and control circuit board 70 is close to the central valve 412 relative to the direct-reading pressure gauge 80.
In one embodiment of the present application, the direct-reading pressure gauge 80 transmits the monitored downhole pressure and temperature to the surface controller through the electric wire 61, so as to monitor downhole temperature and flow pressure in real time, record downhole temperature and flow pressure conditions of each system of oil testing, and realize system anticipation and quick decision making in the oil testing process. The storage type electronic pressure gauge 90 serves as a backup for the direct reading pressure gauge 80, and each functional action is controlled by an independent motor.
Preferably, there are two lateral through holes, and the two lateral through holes are symmetrically arranged with respect to the axis of the cylinder 411.
In one embodiment of the present application, the intelligent oil testing working cylinder is powered by an electric wire 61 and data transmission is performed, and enters the well along with the structure of the oil pipe, and one intelligent oil testing working cylinder is set in each layer to be tested. The ground control box controls the opening and closing of the underground intelligent oil testing working barrel, the opening and closing of a central channel of an oil pipe structure and underground PVT sampling, fracturing, pilot production and closing and pressure recovery processes through an electric wire 61.
The oil testing method does not need to move the oil testing pipe column 40 for many times, realizes real-time measurement of pressure and temperature of each layer in the well, has the advantages of no need of packing and no need of down-test, quick and efficient up-down switching and the like, reduces the operation cost, and realizes efficient oil testing.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The oil testing method is characterized by comprising the following steps:
putting the perforating gun (10) into the sleeve (20), and perforating a plurality of preset oil test layers (30);
-removing the perforating gun (10) and placing a test string (40) into the sleeve (20), aligning a plurality of electrically controlled test cartridges (41) of the test string (40) with a plurality of the test zones (30);
the oil testing pipe column (40) separates and seals a plurality of oil testing layers (30);
the oil testing pipe column (40) respectively tests a plurality of oil testing layers (30);
performing reverse circulation killing on the test oil pipe column (40);
and taking out the test oil pipe column (40).
2. The method of testing oil according to claim 1, wherein the step of separating and sealing the plurality of test oil layers (30) by the test oil string (40) comprises the steps of:
the ground control box (50) closes a plurality of electric control test cylinders (41) of the test oil pipe column (40) so as to isolate the sleeve (20) from the oil pipe structure (42);
-pressurising the tubing structure (42), a plurality of packers (43) on the tubing structure (42) being inflated and sealed against the sleeve (20) such that a region between adjacent sleeves (20) and the tubing structure (42) is divided into a plurality of separate test sections by the packers (43).
3. The oil testing method according to claim 1, wherein the oil testing string (40) respectively tests a plurality of the oil testing layers (30) comprises the following steps:
step S1; the ground control box (50) opens one electric control test cylinder (41) in a plurality of electric control test cylinders (41);
step S2: if the oil test layer (30) corresponding to the opened electric control test cylinder (41) produces oil, executing step S3, and if the corresponding oil test layer (30) does not produce oil, directly executing step S4 by skipping step S3;
the step S3: performing unstable well testing on the oil testing layer (30) corresponding to the opened electronic control testing cylinder (41);
the step S4: fracturing the oil test layer (30) corresponding to the opened electric control testing cylinder (41), and performing unstable well testing on the oil test layer (30) corresponding to the opened electric control testing cylinder (41);
repeating the steps S1 to S4, and performing oil testing on different oil testing layers (30) until the oil testing of all the oil testing layers (30) is completed.
4. A method of testing oil according to claim 3, characterized in that in performing an unstable test of the oil testing zone (30) corresponding to the opened electrically controlled test cartridge (41), the size of the surface choke is changed, and the electrically controlled test cartridge (41) records the oil flow temperature and pressure.
5. A method for testing oil according to claim 3, characterized in that in performing unstable well testing on the oil testing layer (30) corresponding to the opened electrically controlled testing cylinder (41), the opened electrically controlled testing cylinder (41) is closed, and a pressure recovery test is performed on the oil testing layer (30).
6. The oil testing method according to claim 5, characterized in that in the unstable well testing of the oil testing layer (30) corresponding to the opened electronic control testing cylinder (41), after the electronic control testing cylinder (41) is closed, oil reserved in the electronic control testing cylinder (41) is sampled.
7. The method of testing oil according to claim 1, wherein the reverse circulation killing of the test string (40) comprises the steps of: and the ground control box (50) closes all the electric control test cylinders (41), opens a counter-pressure well valve (44) of the test oil pipe column (40), and leads fluid into the oil pipe structure (42) through the counter-pressure well valve (44).
8. The test run method according to claim 1, wherein during said removing of said test run string (40), said test run string (40) is removed if the density in the tubing arrangement (42) is equal to the density in said sleeve (20).
9. A test string, characterized in that the test method according to any of claims 1 to 8 is applied in the test string (40), the test string (40) comprising:
a tubing structure (42);
the oil pipe structure comprises a plurality of electric control test cylinders (41), wherein the electric control test cylinders (41) are arranged in a plurality, the plurality of electric control test cylinders (41) are sleeved on the oil pipe structure (42) at intervals, and the electric control test cylinders (41) are communicated with the inside of the oil pipe structure (42);
a plurality of packers (43), wherein the packers (43) are sleeved on the oil pipe structure (42), and one packer (43) is arranged between every two adjacent electric control test cylinders (41);
a surface control box (50), wherein a cable of the surface control box (50) penetrates through the packer (43) to be electrically connected with each electric control test cylinder (41).
10. The test string according to claim 9, wherein the test string (40) further comprises a counter-pressure well valve (44), the counter-pressure well valve (44) is disposed above all the packers (43), the tubing structure (42) has a plurality of tubing, the plurality of tubing are sequentially connected to form the tubing structure (42), the tubing at least below the counter-pressure well valve (44) has a central oil hole and an offset hole, the electrically controlled testing cartridge (41) is communicated with the central oil hole, and the cable is threaded into the offset hole to be electrically connected with the electrically controlled testing cartridge (41).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110039039.4A CN114753827A (en) | 2021-01-12 | 2021-01-12 | Oil testing method and oil testing tubular column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110039039.4A CN114753827A (en) | 2021-01-12 | 2021-01-12 | Oil testing method and oil testing tubular column |
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| CN111155992A (en) * | 2018-11-07 | 2020-05-15 | 中国石油天然气股份有限公司 | Multilayer combined operation oil testing device and method |
| CN211115961U (en) * | 2019-10-29 | 2020-07-28 | 中国石油集团川庆钻探工程有限公司长庆井下技术作业公司 | Intelligent switch test valve stratum test tubular column |
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| US5287741A (en) * | 1992-08-31 | 1994-02-22 | Halliburton Company | Methods of perforating and testing wells using coiled tubing |
| US20110017448A1 (en) * | 2008-01-11 | 2011-01-27 | Douglas Pipchuk | Zonal testing with the use of coiled tubing |
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