CN113586017A - Perforating and sand-preventing integrated pipe column suitable for volcanic reservoir and using method - Google Patents
Perforating and sand-preventing integrated pipe column suitable for volcanic reservoir and using method Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 239000004576 sand Substances 0.000 claims abstract description 97
- 230000002265 prevention Effects 0.000 claims abstract description 18
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000004904 shortening Methods 0.000 claims abstract description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 17
- 239000010959 steel Substances 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 13
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- 238000012360 testing method Methods 0.000 claims description 4
- 230000003213 activating effect Effects 0.000 claims description 3
- 238000012937 correction Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 239000012224 working solution Substances 0.000 claims 1
- 230000009466 transformation Effects 0.000 abstract description 10
- 238000010276 construction Methods 0.000 abstract description 8
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 6
- 238000002407 reforming Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 4
- 239000003345 natural gas Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 235000011837 pasties Nutrition 0.000 description 3
- 238000005474 detonation Methods 0.000 description 2
- 239000003208 petroleum Substances 0.000 description 2
- 241001530209 Swertia Species 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/11—Perforators; Permeators
- E21B43/116—Gun or shaped-charge perforators
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/07—Telescoping joints for varying drill string lengths; Shock absorbers
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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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in 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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/12—Packers; Plugs
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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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/086—Screens with preformed openings, e.g. slotted liners
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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Abstract
The invention discloses a perforating and sand-preventing integrated pipe column suitable for a volcanic reservoir and a using method thereof, wherein the pipe column comprises a first oil pipe, a second oil pipe, an expansion joint, a third oil pipe, a permanent completion packer, a fourth oil pipe, a sand-preventing sieve pipe, a perforating gun group and a ball-receiving ball seat arranged in the sand-preventing sieve pipe which are sequentially connected, and the expansion joint is in a stretching state when entering a well and is used for compensating the shortening of the length of the pipe column; the ball-catching ball seat arranged in the sand control screen pipe can slide downwards along the inner cavity of the sand control screen pipe. The invention realizes one-trip pipe column perforation, reservoir transformation, sand prevention and well completion operation, simplifies construction and improves construction efficiency; the well killing fluid is drained back in time through the pipe column structure after the perforation operation is finished, so that the pollution of a volcanic reservoir is avoided; the sand control treatment of the flow-back objects is realized through the sand control screen pipe, so that the flow-back objects are prevented from blocking the pipe column; meanwhile, the releasing device is used for realizing the releasing and well falling of the perforating gun group, and the problem that the shaft is buried due to sand production at the perforating section and bridging of the perforating gun group is avoided.
Description
Technical Field
The invention relates to the technical field of downhole operation tools of petroleum wells, in particular to an integrated tubular column suitable for perforating and sand prevention of a volcanic reservoir and a using method thereof.
Background
Recently, the great discovery that natural gas is obtained in volcanic rocks in Sichuan basin, and the natural gas resource distribution area is about 6000km2In the process of exploiting natural gas, the phenomena that sand is produced from the stratum and the back-up materials are pasty to block the pipe column occur; meanwhile, core indoor experiments show that the stratum has strong sensitivity, the well wall is easy to collapse, and the aims of preventing sand and protecting the reservoir can not be achieved by applying the conventional pipe column structure and the well completion process.
A comparison document, grand dawn. crammer seven-day volcanic gas reservoir development subject technology [ J ] natural gas industry, 2010 (02); swertia longissima, wangxiangqiang, etc. three ponds lake oil field volcanic rock well completion technology [ J ]. petroleum geology and engineering, 2011 (S1); the Li Jun Chang Ling volcanic rock gas reservoir well completion and production reservoir protection technology [ J ]. special oil and gas reservoir, 2012, (04) respectively explores and researches various volcanic rock gas reservoir well completion processes in China, but the conditions similar to sand production of the volcanic rock reservoir in the Sichuan basin do not occur, and the well completion operation of the volcanic rock reservoir in the Sichuan basin can not be effectively completed by adopting the conventional tubular column structure and the conventional well completion process.
Disclosure of Invention
The invention aims to solve the technical problem of well completion operation of volcanic rock reservoirs in Sichuan basin, and provides an integrated tubular column suitable for perforation and sand prevention of the volcanic rock reservoirs and a using method thereof.
The invention is realized by the following technical scheme:
a perforating and sand-preventing integrated tubular column suitable for a volcanic reservoir comprises a first oil pipe, a second oil pipe, an expansion joint, a third oil pipe, a permanent well completion packer, a fourth oil pipe, a sand-preventing sieve tube, a perforating gun group and a ball-receiving ball seat arranged in the sand-preventing sieve tube, wherein the expansion joint is in a stretching state when entering a well and is used for compensating for the shortening of the length of the tubular column;
the ball receiving ball seat arranged in the sand control screen pipe can slide downwards along the inner cavity of the sand control screen pipe. The invention provides a simple integral pipe column suitable for perforating and sand prevention of the volcanic reservoir, realizes that the perforating, reservoir transformation, sand prevention and well completion operations of the volcanic reservoir in the Sichuan basin are completed by one pipe column, simplifies construction and improves construction efficiency; the well killing fluid is drained back in time through the pipe column structure after the perforation operation is finished, so that the pollution of a volcanic reservoir is avoided; the sand control treatment of the flowback materials is realized through the sand control screen pipe, so that the flowback materials are prevented from being pasty to block the pipe column; meanwhile, the releasing device on the perforating gun group is used for releasing the perforating gun group and dropping the well, so that the problem that the shaft is buried due to sand production at the perforating section and bridging of the perforating gun group is avoided.
The further technical scheme is as follows:
the diameters of the first oil pipe and the third oil pipe are larger than that of the second oil pipe, and the first oil pipe, the second oil pipe and the third oil pipe form a dumbbell-shaped structure;
the third oil pipe is a thickened oil pipe with the thickness of 9-14 mm, and the length of the third oil pipe is matched with the effective hanging weight required to be applied to the permanent completion packer.
Further: when steel balls are matched in the ball catching ball seat and the force value of the ball catching ball seat, which hinders the ball catching ball seat from moving downwards, is larger than the pressure value of the ball catching ball seat, the ball catching ball seat is positioned between the fourth oil pipe and the sand control screen pipe;
further: when the ball catching seat is internally matched with a steel ball and the force value of the ball catching seat, which hinders the ball catching seat from moving downwards, is smaller than the pressure value of the ball catching seat, the ball catching seat slides downwards to the bottom of the sand control screen pipe.
Further: the fourth oil pipe and the sand control screen pipe are thickened oil pipes which are made of high-strength steel and have the thickness of 9-14 mm, and the length of the fourth oil pipe is not less than 50 m.
Further: the perforating gun group is connected with the bottom end of the sand control screen pipe, and the bottom end of the sand control screen pipe is in a blocking state.
Further: and a releasing device is arranged on the perforating gun group.
The method for using the integrated tubular column suitable for perforating, reforming and preventing sand in the volcanic reservoir comprises the following steps of:
the method comprises the following steps: the pipe column enters the well, and when the working environment of clear water or low-density oil testing is in the shaft, the integrated pipe column suitable for perforating, reforming and preventing sand of the volcanic reservoir is put down to a preset position and subjected to depth correction;
step two: the permanent completion packer is pressed and abutted in the shaft to seal the shaft annular space;
step three: perforating and releasing, activating the perforating gun group to perform perforating operation, and performing releasing work after perforating is completed;
step four: the well killing fluid is drained back, and after the perforation is finished, the well killing fluid is drained back in time through the tubular column after passing through the sand screen of the sand control screen pipe;
step five: and completing the well and putting into production. The use method of the integrated tubular column suitable for perforating, reforming and preventing sand of the volcanic reservoir provided by the invention can realize that the perforating, reservoir reforming, sand preventing and well completion operations of the volcanic reservoir in the Sichuan basin can be completed by one-time tubular column; the well killing fluid flowback process can avoid the pollution of volcanic reservoir; the perforation and releasing process can realize well completion work and simultaneously avoid the problem of shaft burying caused by sand production at a perforation section and bridging of a perforating gun group.
The further concrete operation method comprises the following steps:
the specific operation method of the second step is as follows: after the pipe column is lowered to a proper position and is calibrated, a steel ball is thrown into the pipe column to a ball catching ball seat, the fourth oil pipe is not communicated with the sand prevention screen pipe after the steel ball is matched with the ball catching ball seat, then a permanent well completion packer is pressurized, and the permanent well completion packer is pressurized and abutted against the inside of the shaft, so that the sealing of the annular space of the shaft is realized, and the sealing effect of the annular space of the shaft is tested;
the third step comprises the following specific operation steps: and after the permanent completion packer seals the annular space of the shaft, the permanent completion packer continues to pressurize the inside of the pipe column until the downward pressure value of the ball-catching ball seat is larger than the force resisting the downward movement of the ball-catching ball seat, the ball-catching ball seat slides downwards to the bottom of the sand control screen pipe and excites the emission gun group to carry out perforation operation, and after the perforation operation is finished, the releasing device is activated to realize the releasing operation of the emission gun group.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention is suitable for perforating and sand prevention integrated tubular column of the volcanic reservoir and the using method, can realize that perforating, reservoir transformation, sand prevention and well completion operation of the volcanic reservoir in the Sichuan basin are finished by one tubular column through a simple tubular column structure and the using method, simplifies construction, improves construction efficiency and effectively protects the volcanic reservoir;
2. the invention is suitable for perforating and sand prevention integrated tubular column of the volcanic reservoir and its operation method, carry on the flow back of the well killing fluid in time through the tubular column structure after the perforation operation is finished, avoid the pollution of the volcanic reservoir;
3. the invention is suitable for perforating and sand prevention integrated tubular column of volcanic reservoir and its operation method, realize the releasing and falling of perforating gun group through the releasing device on the perforating gun group, avoid the perforating section sand production and perforating gun group bridge and cause the problem that the wellbore is buried;
4. the invention is suitable for perforating and sand prevention integrated tubular column of volcanic reservoir and its operation method, realize the sand prevention treatment to the back-drain through the sand control screen pipe, prevent the back-drain from presenting the paste and stopping up the tubular column;
5. the invention relates to an integrated tubular column suitable for perforating and sand prevention of a volcanic reservoir and a using method thereof.A telescopic joint can be used for compensating the shortening of the tubular column during the modification of the reservoir and ensuring that the hanging weight of the tubular column at the lower part of the telescopic joint can be effectively applied to a permanent well completion packer so as to ensure the effective sealing of the permanent well completion packer in the modification process.
6. The first oil pipe, the second oil pipe and the third oil pipe form a dumbbell-shaped structure, the third oil pipe adopts a thickened oil pipe, and the weight of the thickened oil pipe can be effectively applied to the permanent well completion packer to meet the hanging weight requirement of the permanent well completion packer, so that the effective sealing of the permanent well completion packer in the transformation process is ensured, and the problem of casing channeling caused by the failure of the packer in the transformation process can be effectively reduced;
7. the fourth oil pipe and the sand control screen pipe are both made of high-strength steel and can resist the influence of higher perforation detonation effect, so that the problem of oil pipe fracture is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a schematic view of the structure of the present invention.
Reference numbers and corresponding part names in the drawings:
1-a first oil pipe, 2-a second oil pipe, 3-a telescopic joint, 4-a third oil pipe, 5-a permanent completion packer, 6-a fourth oil pipe, 7-a ball-catching ball seat, 8-a sand control screen pipe and 9-a perforating gun group.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to one of ordinary skill in the art that: it is not necessary to employ these specific details to practice the present invention. In other instances, well-known structures, circuits, materials, or methods have not been described in detail so as not to obscure the present invention.
Throughout the specification, reference to "one embodiment," "an embodiment," "one example," or "an example" means: the particular features, structures, or characteristics described in connection with the embodiment or example are included in at least one embodiment of the invention. Thus, the appearances of the phrases "one embodiment," "an embodiment," "one example" or "an example" in various places throughout this specification are not necessarily all referring to the same embodiment or example. Furthermore, the particular features, structures, or characteristics may be combined in any suitable combination and/or sub-combination in one or more embodiments or examples. Further, those of ordinary skill in the art will appreciate that the illustrations provided herein are for illustrative purposes and are not necessarily drawn to scale. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "vertical", "horizontal", "upper", "lower", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore, should not be construed as limiting the scope of the present invention.
Examples
As shown in fig. 1, the perforating and sand-preventing integrated tubular column suitable for volcanic reservoir comprises a first oil pipe 1, a second oil pipe 2, an expansion joint 3, a third oil pipe 4, a permanent completion packer 5, a fourth oil pipe 6, a sand-preventing screen pipe 8, a perforating gun group 9 and a ball-catching ball seat 7 arranged in the sand-preventing screen pipe 8 which are connected in sequence, wherein the expansion joint 3 is in a stretching state when entering a well and is used for compensating for the length reduction of the tubular column; in the embodiment, perforation, reservoir transformation, sand prevention and well completion operations of the volcanic rock reservoir in the Sichuan basin are completed by one-time pipe column, so that construction is simplified, and construction efficiency is improved; the well killing fluid is drained back in time through the pipe column structure after the perforation operation is finished, so that the pollution of a volcanic reservoir is avoided; the sand control treatment of the flowback materials is realized through the sand control screen pipe 8, and the flowback materials are prevented from being pasty to block the pipe column; the expansion joint 3 can be used for compensating the shortening of the pipe column during the reservoir transformation and ensuring that the hanging weight of the pipe column at the lower part can be effectively applied to the permanent well completion packer, thereby ensuring the effective sealing of the permanent well completion packer in the transformation process.
The ball catching seats 7 arranged in the sand control screen 8 can slide downwards along the inner cavity of the sand control screen 8. In this embodiment, when the ball-catching ball seat 7 is located between the fourth oil pipe 6 and the sand control screen 8, the fourth oil pipe 6 and the sand control screen are not communicated with each other, and at this time, when the pipe string is pressurized from the top of the pipe string, the permanent completion packer 5 is pressurized and abutted in the wellbore, so as to seal the annular space of the wellbore; when the ball receiving ball seat 7 slides to the bottom of the sand control screen pipe 8, the fourth oil pipe 6 is communicated with the sand control screen pipe, and after the perforation operation is completed, the well killing fluid can be returned through the pipe column, so that the pollution of a volcanic reservoir is avoided.
The diameters of the first oil pipe 1 and the third oil pipe 4 are larger than the diameter of the second oil pipe 2, and the first oil pipe 1, the second oil pipe 2 and the third oil pipe 4 form a dumbbell-shaped structure; first oil pipe 1, second oil pipe 2 and third oil pipe 4 constitute dumbbell structure in this embodiment, can guarantee that its weight is effectual to be exerted and satisfy its heavy hanging requirement on permanent completion packer 5 to guarantee to reform transform effective sealed of in-process permanent completion packer 5, compare in current perforation, transformation test tubular column, can effectually reduce to reform transform the in-process and lead to the problem that the cover is scurried and is led to because of the packer inefficacy.
The third oil pipe 4 is a thickened oil pipe with the thickness of 9-14 mm, and the length of the third oil pipe 4 is matched with the effective hanging weight required to be applied on the permanent completion packer 5. In this embodiment, the third oil pipe 4 is a thickened oil pipe, which has better bending resistance, and can ensure that the hanging weight of the oil pipe on the permanent completion packer 5 is effectively applied to the thickened oil pipe, thereby ensuring the sealing effect of the permanent completion packer 5.
When a steel ball is matched in the ball catching ball seat 7 and the force value of the ball catching ball seat 7 for preventing the ball catching ball seat 7 from moving downwards is larger than the pressure value of the ball catching ball seat 7, the ball catching ball seat 7 is positioned between the fourth oil pipe 6 and the sand control screen pipe 8; in this embodiment, the ball-catching ball seat 7 needs to be matched with the steel ball when separating the fourth oil pipe 6 from the sand control screen pipe 8 and moving downwards; when the packer is set, a force for blocking the downward movement of the ball-catching ball seat 7 exists between the sand control screen pipe 8, and the force for blocking the downward movement is larger than a downward pressure value borne by the ball-catching ball seat 7 when the permanent completion packer 5 is pressurized and sealed, so that the ball-catching ball seat 7 is positioned between the fourth oil pipe 6 and the sand control screen pipe 8, and the permanent completion packer 5 can be pressurized and sealed; in this embodiment, the ball-catching seat 7 is preferably fixed between the fourth tubing 6 and the sand screen 8 by a pin, which provides a force to resist downward movement of the ball-catching seat 7, and the downward pressure on the ball-catching seat 7 when the pin is cut is greater than the downward pressure on the ball-catching seat 7 when the permanent completion packer 5 is pressurized and sealed.
When the ball catching seat 7 is internally matched with a steel ball and the force value of the ball catching seat 7 for preventing the ball catching seat 7 from moving downwards is smaller than the pressure value of the ball catching seat 7, the ball catching seat 7 slides downwards to the bottom of the sand control screen pipe 8. In this embodiment, after the permanent completion packer 5 is pressurized and sealed, the ball-catching ball seat 7 slides downward to the bottom of the sand control screen 8 when the downward pressure on the ball-catching ball seat 7 is greater than the force resisting the downward movement of the ball-catching ball seat, at this time, the fourth oil pipe 6 is communicated with the sand control screen 8, and the well killing fluid and the like can be discharged back through the pipe string, and the perforating gun set 9 can be activated to perform perforating operation only when the ball-catching ball seat 7 falls to the bottom of the sand control screen 8.
The fourth oil pipe 6 and the sand control screen pipe 8 are thickened oil pipes which are made of high-strength steel and have the thickness of 9-14 mm, and the length of the fourth oil pipe 6 is not less than 50 m. In the embodiment, the fourth oil pipe 6 and the sand control screen pipe 8 are made of thickened oil pipes, so that the fourth oil pipe 6 or the sand control screen pipe 8 can be prevented from being damaged or broken due to impact force generated by perforation detonation.
The perforating gun group 9 is connected with the bottom end of the sand control screen pipe 8, and the bottom end of the sand control screen pipe 8 is in a plugging state. In this embodiment, the bottom of the sand control screen 8 is in a plugging state, so that fluid in a production zone after well completion enters a shaft through the sand control section of the sand control screen 8, and the sand control effect of the well completion is guaranteed.
And a releasing device is arranged on the perforating gun group 9. In the embodiment, the perforating gun group 9 is released to drop the well when the releasing device works after the perforating operation is finished, so that the possibility of burying a tubular column caused by sand production of a shaft in a perforating section is reduced.
Example 2:
as shown in figure 1, the method for using the integrated tubular column suitable for perforating and sand control in the volcanic reservoir comprises the following steps:
the method comprises the following steps: the pipe column enters the well, and when the working environment of clear water or low-density oil testing is in the shaft, the integrated pipe column suitable for perforating, reforming and preventing sand of the volcanic reservoir is put down to a preset position and subjected to depth correction;
step two: the shaft is sealed, and the permanent well completion packer 5 is pressed and abutted in the shaft to realize the sealing of the shaft annular space;
step three: perforating and releasing, activating the perforating gun group 9 to perform perforating operation, and performing releasing work after perforating is completed;
step four: the well killing fluid is drained back, and after the perforation is finished, the well killing fluid is drained back in time through the tubular column after passing through the sand screen of the sand control screen 8;
step five: and completing the well and putting into production. In the embodiment, the integrated tubular column suitable for perforating and sand prevention of the volcanic reservoir is used by the method, so that the processes of perforating, reforming, sand prevention, well completion and the like can be completed by one tubular column, and the pollution of the volcanic reservoir can be avoided by the well killing fluid flowback process; the perforation and releasing process can realize well completion work and simultaneously avoid the problem of shaft burying caused by sand production at a perforation section and bridging of a perforating gun group. Compared with the traditional process, the method is simple to operate, and can effectively realize perforation, reservoir transformation, sand prevention and well completion operation on the volcanic rock reservoir in the Sichuan basin.
The specific operation method of step two in this embodiment is as follows:
after the pipe column is lowered to a proper position and is calibrated, a steel ball is thrown into the pipe column to a ball catching ball seat 7, after the steel ball is matched with the ball catching ball seat 7, the fourth oil pipe 6 is not communicated with the sand control screen pipe 8, then the permanent well completion packer 5 is pressurized, the permanent well completion packer 5 is pressurized and abutted in the shaft, the sealing of the annular space of the shaft is realized, and the sealing effect of the annular space of the shaft is tested;
the third step comprises the following specific operation steps:
after the permanent completion packer 5 completes the sealing of the annular space of the shaft, the pressure is continuously applied to the pipe column until the downward pressure value applied to the ball-catching ball seat 7 is larger than the force which is applied to the ball-catching ball seat and hinders the downward movement of the ball-catching ball seat, the ball-catching ball seat 7 slides downwards to the bottom of the sand control screen pipe 8, the launching gun group is excited to carry out the perforating operation, and after the perforating operation is completed, the releasing device is activated to realize the releasing operation of the perforating gun group.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The perforating and sand-preventing integrated pipe column suitable for the volcanic reservoir is characterized by comprising a first oil pipe (1), a second oil pipe (2), an expansion joint (3), a third oil pipe (4), a permanent well completion packer (5), a fourth oil pipe (6), a sand-preventing sieve pipe (8), a perforating gun group (9) and a ball-collecting ball seat (7) arranged in the sand-preventing sieve pipe (8), wherein the expansion joint (3) is in a stretching state when entering a well and is used for compensating for the shortening of the length of the pipe column;
the ball catching ball seat (7) arranged in the sand control screen pipe (8) can slide downwards along the inner cavity of the sand control screen pipe (8).
2. The integrated string for perforating and sand control in a volcanic reservoir as claimed in claim 1, wherein the diameters of the first oil pipe (1) and the third oil pipe (4) are larger than the diameter of the second oil pipe (2), and the first oil pipe (1), the second oil pipe (2) and the third oil pipe (4) form a dumbbell-shaped structure;
the third oil pipe (4) is a thickened oil pipe with the thickness of 9-14 mm, and the length of the third oil pipe (4) is matched with the effective hanging weight required to be applied to the permanent completion packer (5).
3. The perforating and sand control integrated tubular column suitable for the volcanic reservoir as claimed in claim 1, wherein when the ball-catching ball seat (7) is internally fitted with steel balls and the force value of the ball-catching ball seat (7) resisting the downward movement is larger than the force value of the ball-catching ball seat (7), the ball-catching ball seat (7) is positioned between the fourth oil pipe (6) and the sand control screen (8);
when the ball catching ball seat (7) is internally matched with a steel ball, and the force value of the ball catching ball seat (7) resisting the downward movement is smaller than the pressure value of the ball catching ball seat (7), the ball catching ball seat (7) slides downwards to the bottom of the sand control screen pipe (8).
4. The perforating and sand-preventing integrated tubular column for the volcanic reservoir as claimed in claim 1, wherein the fourth tubing (6) and the sand-preventing screen (8) are thickened tubing made of high-strength steel and having a thickness of 9mm to 14mm, and the length of the fourth tubing (6) is not less than 50 m.
5. The perforating and sand control integrated tubular column for the volcanic reservoir as claimed in claim 1, wherein said perforating gun set (9) is connected to the bottom end of said sand control screen (8), and the bottom end of said sand control screen (8) is in a plugging state.
6. The integrated string for perforating and sand control in volcanic reservoir as claimed in claim 1, wherein a releasing device is arranged on the perforating gun group (9).
7. The use method of the perforating and sand-preventing integrated tubular column suitable for the volcanic reservoir stratum as claimed in any one of claims 1 to 6 is characterized by comprising the following steps:
the method comprises the following steps: the pipe column enters a well, and when the environment of clear water or low-density oil testing working solution exists in a shaft, the integrated pipe column suitable for perforating and sand prevention of the volcanic reservoir is put down to a preset position and subjected to depth correction;
step two: the permanent well completion packer (5) is pressed and abutted in the shaft to seal the shaft annular space;
step three: perforating and releasing, activating the perforating gun group (9) to perform perforating operation, and releasing after perforating is completed;
step four: the well killing fluid is drained back, and after the perforation is finished, the well killing fluid is drained back in time through the tubular column after passing through the sand screen of the sand control screen (8);
step five: and completing the well and putting into production.
8. The use method of the integrated tubular column suitable for perforating and sand control in the volcanic reservoir as claimed in claim 7, wherein the specific operation method of the second step is as follows:
after the pipe column is lowered to a proper position and is calibrated, a steel ball is thrown into the pipe column to a ball catching ball seat (7), the fourth oil pipe (6) is not communicated with a sand control screen pipe (8) after the steel ball is matched with the ball catching ball seat (7), then a permanent well completion packer (5) is pressurized, the permanent well completion packer (5) is pressurized and abutted in a shaft, the sealing of the annular space of the shaft is realized, and the sealing effect of the annular space of the shaft is tested;
the third step comprises the following specific operation steps:
after the permanent completion packer (5) completes the sealing of the annular space of the shaft, the pressure is continuously applied to the pipe column until the downward pressure value of the ball-catching ball seat (7) is larger than the force resisting the downward movement of the ball-catching ball seat, the ball-catching ball seat (7) slides downwards to the bottom of the sand control screen pipe (8), the launching gun group is activated to carry out the perforating operation, and after the perforating operation is completed, the releasing device is activated to realize the releasing operation of the perforating gun group.
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| CN202111013545.2A CN113586017B (en) | 2021-08-31 | 2021-08-31 | Integrated pipe column suitable for perforation and sand prevention of volcanic reservoir and use method |
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| CN113586017B CN113586017B (en) | 2023-05-16 |
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