CN112796660B - Construction method of double parallel branch horizontal communication well - Google Patents
Construction method of double parallel branch horizontal communication well Download PDFInfo
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- CN112796660B CN112796660B CN202110098242.9A CN202110098242A CN112796660B CN 112796660 B CN112796660 B CN 112796660B CN 202110098242 A CN202110098242 A CN 202110098242A CN 112796660 B CN112796660 B CN 112796660B
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- 238000004891 communication Methods 0.000 title claims abstract description 44
- 238000010276 construction Methods 0.000 title claims abstract description 13
- 238000005553 drilling Methods 0.000 claims abstract description 61
- 239000003245 coal Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims description 12
- 239000011152 fibreglass Substances 0.000 claims description 11
- 238000005259 measurement Methods 0.000 claims description 6
- 238000004458 analytical method Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000011161 development Methods 0.000 description 4
- 238000009933 burial Methods 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
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- 230000004048 modification 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/046—Directional drilling horizontal drilling
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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
- E21B43/006—Production of coal-bed methane
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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
- E21B43/30—Specific pattern of wells, e.g. optimising the spacing of wells
- E21B43/305—Specific pattern of wells, e.g. optimising the spacing of wells comprising at least one inclined or horizontal well
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
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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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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention discloses a construction method of a double parallel branch horizontal communication well, which comprises the following steps: (1) Drilling the vertical well section, the deflecting section and the horizontal section of the horizontal well A; (2) Drilling of a vertical well section and a deflecting section of the horizontal well B is completed, wherein the wellhead distance L of the double horizontal wells is adapted to the well site size of the double horizontal wells; (3) Continuing drilling of the horizontal section of the horizontal well B, and when the distance from the horizontal section A to the communication target point 80m, taking off the drill and replacing the drill with the drilling tool assembly with the strong magnetic joint; (4) Jacking the magnetic guiding instrument to a communication target point of the horizontal well A; (5) And setting the completion pipe column after the well is communicated by adjusting the well track of the horizontal well B to reach the communication target point of the horizontal well A. The invention has the following beneficial effects: the land-sign area is reduced when well positions are deployed on the ground, the two horizontal wells are communicated through the tail ends, the horizontal length is doubled, the contact area of the coal bed is increased, the coal bed gas drainage rate is improved, and the single well yield is improved.
Description
Technical Field
The invention belongs to the field of coal bed gas exploitation and coal gasification, and particularly relates to a construction method of a double parallel branch horizontal communication well.
Background
With the increasing demand of energy and the increasing shortage of conventional oil and gas resources in economic sustainable development, countries in the world are actively searching for new energy resources to make up for the gap of the conventional oil and gas resources. The coal bed gas resource is reasonably developed, so that the occurrence of mine accidents can be greatly reduced, and the dependence of national economy on conventional oil gas resources can be reduced.
The Chinese coal bed gas has abundant resources, but has the geological characteristics of low permeability, low pressure, low saturation, structural coal development, strong heterogeneity of coal reservoirs and the like, and determines that the conventional development of the coal bed gas by a ground vertical well and a directional well is not a development technology particularly suitable for the characteristics of the Chinese coal bed gas reservoir.
The existing well type is a U-shaped well, and the U-shaped well often has the problems of difficult land characterization, shallow coal seam burial teaching, incapability of effectively covering one well, low drilling meeting rate, small contact coal seam area and the like in the actual coal seam gas drilling process.
Disclosure of Invention
The invention aims to: aiming at the problems in the prior art, the invention discloses a construction method of a double parallel branch horizontal communication well, which overcomes the defects that one horizontal well has small contact coal bed area and can not completely cover a drainage surface, and enriches the well type of a well completion for coal bed gas drainage.
The technical scheme is as follows: a construction method of a double parallel branch horizontal communication well comprises the following steps:
(1) Drilling the vertical well section, the deflecting section and the horizontal section of the horizontal well A;
(2) Drilling of a vertical well section and a deflecting section of the horizontal well B is completed, wherein the wellhead distance L of the double horizontal wells is adapted to the well site size of the double horizontal wells;
(3) Continuing drilling of the horizontal section of the horizontal well B, and when the horizontal section is 80m away from the communication target point of the horizontal well A, taking off the drill and replacing the drill assembly with the strong magnetic joint, wherein:
the horizontal distance H of the horizontal section of the double horizontal wells is 50-100m;
(4) Jacking the magnetic guiding instrument to a communication target point of the horizontal well A;
(5) And setting the completion pipe column after the well is communicated by adjusting the well track of the horizontal well B to reach the communication target point of the horizontal well A.
Further, the step (1) includes the steps of:
(11) Drilling of the vertical well section A is completed, a first vertical well section sleeve is put into the vertical well section A, and the vertical well section A is provided with a first vertical well section sleeve, wherein: the bottom end of the vertical well section of the horizontal well A is lowered to at least 20m below the bedrock;
(12) And finishing drilling of the A horizontal well deflecting section, and lowering a first deflecting section sleeve into the A horizontal well deflecting section, wherein: the bottom of the A horizontal well deflecting section is landed on a target layer;
(13) Completing drilling of the horizontal section of the horizontal well A, and putting a first horizontal section sleeve into the horizontal section of the horizontal well A, wherein the front end of the first horizontal section sleeve is sleeved with a glass fiber reinforced plastic sleeve, and the area where the glass fiber reinforced plastic sleeve is located is a communication target point;
further, in the step (1), drilling of the vertical well section, the deflecting section and the horizontal section of the horizontal well, and in the step (2), drilling of the vertical well section, the deflecting section and the horizontal section of the horizontal well of the part B are all directional drilling tools, and the directional drilling tools are a drill bit, a screw, a non-magnetic joint and a drill rod which are sequentially connected.
Further, in the step (12), the target layer is a coal seam or a coal seam roof or a coal seam floor.
Further, in the step (1), the inner diameter of the well completion string of the horizontal well A is larger than 90mm.
Further, the step (2) includes the steps of:
(21) Completing drilling of the vertical well section of the horizontal well B, and lowering a second vertical well section sleeve into the vertical well section of the horizontal well B, wherein: the bottom end of the vertical well section of the horizontal well B is lowered to at least 20m below the bedrock;
(12) And finishing drilling of the B horizontal well deflecting section, and lowering a second deflecting section sleeve into the B horizontal well deflecting section, wherein: and the bottom of the B horizontal well deflecting section is landed on a target layer.
In the step (4), the oil pipe and the non-magnetic drill collar are selected as the top feeding tool, and the magnetic guiding instrument is placed in the non-magnetic drill collar and is fed into the communication target point of the horizontal well A along the first horizontal section sleeve, so that the instrument is prevented from being damaged when being propped against the magnetic guiding instrument.
Further, in the step (5), in the drilling process of the communicating section, track measurement is performed every 3m of drilling, and the measurement process is as follows:
51 Lifting the drilling tool after drilling for 3 m;
52 At a constant speed, the magnetic guiding instrument collects a point every 0.5 m;
53 And (3) analyzing after collecting the data, and adjusting the tool surface according to the analysis result to drill into the communication target point.
In the step (4), the magnetic guiding instrument is jacked into the glass fiber reinforced plastic sleeve through the through cable and the oil pipe for the protection device at the joint of the through cable and is placed at a position 5m below the top of the glass fiber reinforced plastic sleeve.
Furthermore, two non-magnetic drill collars are needed to be added at the bottom of the oil pipe, so that the magnetic guiding instrument is prevented from being blocked in the jacking process.
Further, the horizontal well A is a casing well cementation well completion or an open hole well completion, and the horizontal well B is a casing well cementation well completion or an open hole well completion.
The beneficial effects are that: the construction method of the double parallel branch horizontal communication well disclosed by the invention has the following beneficial effects:
the land-sign area is reduced when well positions are deployed on the ground, the two horizontal wells are communicated through the tail ends, the horizontal length is doubled, the contact area of the coal bed is increased, the coal bed gas drainage rate is improved, and the single well yield is improved.
Drawings
FIG. 1 is a schematic illustration of a dual horizontal well bore configuration.
Fig. 2 is a schematic diagram of a magnetic steering instrument overhead position.
Wherein:
1-A horizontal well
11-first straight section casing 12-first beveled section casing
13-first horizontal section sleeve
2-B horizontal well
21-second straight wellbore section casing 22-second casing of deflecting section
23-second horizontal section casing 24-drilling tool change point
3-communication target point 31-glass fiber reinforced plastic sleeve
4-oil pipe
5-non-magnetic joint
6-magnetic guide instrument
7-core cable
Horizontal distance of horizontal section of H-double horizontal well
L-double horizontal wellhead distance
The specific embodiment is as follows:
the following detailed description of specific embodiments of the invention.
Example 1
As shown in fig. 1 and 2, a construction method of a double parallel branch horizontal communication well includes the following steps:
(1) Drilling the vertical well section, the deflecting section and the horizontal section of the horizontal well A;
(2) Drilling of a vertical well section and a deflecting section of the horizontal well B is completed, wherein the wellhead distance L of the double horizontal wells is adapted to the well site size of the double horizontal wells;
(3) Continuing the drilling of the horizontal section of the horizontal well B, and when the drilling is 80m away from the communication target point 3 of the horizontal well A1 (namely, the drilling tool replacement point 24), taking off and replacing the drilling tool with the drilling tool assembly with the strong magnetic joint, wherein:
the horizontal distance H of the horizontal section of the double horizontal wells is 50m;
(4) The magnetic guiding instrument 6 is jacked to the communication target point 3 of the horizontal well A1;
(5) And setting a completion string (a second horizontal section sleeve 23) after completing the communication by adjusting the borehole track of the horizontal well B2 to reach the communication target point 3 of the horizontal well A1.
The communication basis of the horizontal well A1 and the horizontal well B2 is as follows: the magnetic guiding instrument 6 in the horizontal well A1 analyzes the azimuth and vertical depth deviation and the residual distance of the drill bit of the horizontal well B and the communication target point 3 of the horizontal well A1 according to the signal intensity of the rotating magnetic field of the strong magnetic joint in the horizontal well B drilling tool assembly, so that the relative spatial positions of the drill bit and the butt joint target point are calculated, the track direction of the horizontal well B2 is adjusted according to the azimuth deviation and vertical depth deviation of the prompt, and the communication purpose is achieved.
Further, the step (1) includes the steps of:
(11) Completing drilling of the vertical section of the horizontal well A, and lowering a first vertical section sleeve 11 into the vertical section of the horizontal well A, wherein: the bottom end of the vertical well section of the horizontal well A is lowered to at least 20m below the bedrock;
(12) Completing the drilling of the A horizontal well deflecting section and lowering a first deflecting section sleeve 12 into the A horizontal well deflecting section, wherein: the bottom of the A horizontal well deflecting section is landed on a target layer;
(13) Completing drilling of the horizontal section of the horizontal well A, and putting a first horizontal section sleeve 13 into the horizontal section of the horizontal well A, wherein the front end of the first horizontal section sleeve 13 is sleeved with a glass fiber reinforced plastic sleeve 31 (providing a communication nonmagnetic environment), and the area where the glass fiber reinforced plastic sleeve 31 is located is a communication target point 3;
further, the drilling of the vertical well section A, the deflecting section and the horizontal well section in the step (1), the drilling of the horizontal well section B, the deflecting section and the horizontal well section B in the step (2) are all directional drilling tools, the directional drilling tool is a drill bit, a screw rod, a non-magnetic joint 5 and a drill rod which are connected in sequence.
Further, in the step (12), the target layer is in a coal seam.
Further, in the step (1), the inner diameter of the completion string of the horizontal well 1A is larger than 90mm.
Further, the step (2) includes the steps of:
(21) Completing the drilling of the vertical section of the horizontal well B, and lowering a second vertical section sleeve 21 into the vertical section of the horizontal well B, wherein: the bottom end of the vertical well section of the horizontal well B is lowered to at least 20m below the bedrock;
(12) Completing the drilling of the B horizontal well casing section and running a second casing 22 into said B horizontal well casing section, wherein: and the bottom of the B horizontal well deflecting section is landed on a target layer.
In the step (4), the oil pipe 4 and the non-magnetic drill collar are selected as the top feeding tool, the magnetic guiding instrument 6 is placed in the non-magnetic drill collar and is fed into the communication target point 3 of the horizontal well A1 along the first horizontal section sleeve 13, and the instrument is prevented from being damaged when the magnetic guiding instrument 6 is lifted.
Further, in the step (5), in the drilling process of the communicating section, track measurement is performed every 3m of drilling, and the measurement process is as follows:
51 Lifting the drilling tool after drilling for 3 m;
52 At a constant speed, the magnetic guiding instrument 6 collects a point every 0.5 m;
53 After data are collected, analysis is carried out, a tool face is adjusted according to analysis results, and drilling is carried out to the communication target point 3.
Further, in the step (4), the magnetic guiding instrument 6 is pushed into the glass fiber reinforced plastic sleeve 31 through the through cable 7 and the oil pipe 4 for the protection device at the joint of the through cable 7, and is placed at a position 5m below the top of the glass fiber reinforced plastic sleeve 31.
Furthermore, two non-magnetic drill collars are required to be added at the bottom of the oil pipe 4, so that the magnetic guiding instrument 6 is prevented from being blocked in the jacking process;
further, the horizontal well A1 is a casing well cementation completion, and the horizontal well B2 is a casing well cementation completion.
Example 2
Substantially the same as in embodiment 1, the difference is only that:
the horizontal distance H of the horizontal section of the double horizontal wells is 100m;
the target layer in the step (12) is a coal seam roof;
the horizontal well 1 is an open hole completion; horizontal well 2 is an open hole completion.
Example 2
Substantially the same as in embodiment 1, the difference is only that:
the horizontal distance H of the horizontal section of the double horizontal wells is 70m;
the target layer in the step (12) is a coal seam floor;
the horizontal well 1 is a casing well cementation well completion; horizontal well 2 is an open hole completion.
The embodiments of the present invention have been described in detail. However, the present invention is not limited to the above-described embodiments, and various modifications may be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Claims (8)
1. The construction method of the double parallel branch horizontal communication well is characterized by comprising the following steps of:
(1) Drilling the vertical well section, the deflecting section and the horizontal section of the horizontal well A;
(2) Drilling of a vertical well section and a deflecting section of the horizontal well B is completed, wherein the wellhead distance L of the double horizontal wells is adapted to the well site size of the double horizontal wells;
(3) Continuing drilling of the horizontal section of the horizontal well B, and when the horizontal section is 80m away from the communication target point of the horizontal well A, taking off the drill and replacing the drill assembly with the strong magnetic joint, wherein:
the horizontal distance H of the horizontal section of the double horizontal wells is 50-100m;
(4) Jacking the magnetic guiding instrument to a communication target point of the horizontal well A;
(5) And setting the completion pipe column after the well is communicated by adjusting the well track of the horizontal well B to reach the communication target point of the horizontal well A.
2. The method of constructing a double parallel branch horizontal communication well of claim 1, wherein step (1) comprises the steps of:
(11) Drilling of the vertical well section A is completed, a first vertical well section sleeve is put into the vertical well section A, and the vertical well section A is provided with a first vertical well section sleeve, wherein: the bottom end of the vertical well section of the horizontal well A is lowered to at least 20m below the bedrock;
(12) And finishing drilling of the A horizontal well deflecting section, and lowering a first deflecting section sleeve into the A horizontal well deflecting section, wherein: the bottom of the A horizontal well deflecting section is landed on a target layer;
(13) And finishing drilling of the horizontal section of the horizontal well A, and putting a first horizontal section sleeve into the horizontal section of the horizontal well A, wherein the front end of the first horizontal section sleeve is sleeved with a glass fiber reinforced plastic sleeve, and the area where the glass fiber reinforced plastic sleeve is located is a communication target point.
3. The method for constructing a double parallel branch horizontal communication well according to claim 2, wherein the objective layer in the step (12) is a coal seam or a coal seam roof or a coal seam floor.
4. The construction method of the double parallel branch horizontal communication well according to claim 1, wherein in the step (1), drilling of the vertical well section, the deflecting section and the horizontal well section of the A horizontal well, drilling of the vertical well section, the deflecting section of the B horizontal well and the horizontal well section of the part B horizontal well are all directional drilling tools, and the directional drilling tools are a drill bit, a screw, a non-magnetic joint and a drill rod which are sequentially connected.
5. The construction method of the double parallel branch horizontal communication well according to claim 1, wherein in the step (1), the inner diameter of a well completion pipe column of the horizontal well A is larger than 90mm, the horizontal well A is a well completion with casing or an open hole well completion, and the horizontal well B is a well completion with casing or an open hole well completion.
6. The method for constructing a double parallel branch horizontal communication well as set forth in claim 1, wherein the step (2) comprises the steps of:
(21) Completing drilling of the vertical well section of the horizontal well B, and lowering a second vertical well section sleeve into the vertical well section of the horizontal well B, wherein: the bottom end of the vertical well section of the horizontal well B is lowered to at least 20m below the bedrock;
(22) And finishing drilling of the B horizontal well deflecting section, and lowering a second deflecting section sleeve into the B horizontal well deflecting section, wherein: and the bottom of the B horizontal well deflecting section is landed on a target layer.
7. The construction method of the double parallel branch horizontal communication well according to claim 1, wherein in the step (4), an oil pipe and a non-magnetic drill collar are selected as the top feeding tool, a magnetic guiding instrument is placed in the non-magnetic drill collar and is fed into a communication target point of the A horizontal well along the first horizontal section sleeve, and the instrument is prevented from being damaged when being pushed.
8. The construction method of a double parallel branch horizontal communication well according to claim 1, wherein in the step (5), in the drilling process of the communication section, track measurement is performed every 3m of drilling, and the measurement process is as follows:
51 Lifting the drilling tool after drilling for 3 m;
52 At a constant speed, the magnetic guiding instrument collects a point every 0.5 m;
53 And (3) analyzing after collecting the data, and adjusting the tool surface according to the analysis result to drill into the communication target point.
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| CN202110098242.9A CN112796660B (en) | 2021-01-25 | 2021-01-25 | Construction method of double parallel branch horizontal communication well |
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| CN113156534A (en) * | 2021-04-19 | 2021-07-23 | 广州探霸仪器有限公司 | Control method, device and equipment of detection system and storage medium |
| CN114909119B (en) * | 2022-04-29 | 2023-03-24 | 大庆辰平钻井技术服务有限公司 | Drilling method for converting original vertical well or inclined well into U-shaped geothermal well with ultra-short radius |
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| CN1515783A (en) * | 2003-08-29 | 2004-07-28 | 化工部长沙设计研究院 | Method for exploiting natural alkali mineral by utilizing horizontal butt well |
| US7510030B2 (en) * | 2006-06-30 | 2009-03-31 | Vector Magnetics Llc | Elongated cross coil assembly for use in borehole location determination |
| CN103216234B (en) * | 2013-04-23 | 2015-11-18 | 中国地质科学院勘探技术研究所 | A kind of construction method of horizontal branch many well groups butt shaft |
| CN104196453B (en) * | 2014-08-29 | 2017-02-15 | 富地柳林燃气有限公司 | Coalbed methane development well |
| CN110043229B (en) * | 2019-04-02 | 2022-08-05 | 广州海洋地质调查局 | Sea area natural gas hydrate multi-well group communication gathering mining method |
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