CN107288546A - The completion method and horizontal well of a kind of horizontal well - Google Patents
The completion method and horizontal well of a kind of horizontal well Download PDFInfo
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- CN107288546A CN107288546A CN201710703381.3A CN201710703381A CN107288546A CN 107288546 A CN107288546 A CN 107288546A CN 201710703381 A CN201710703381 A CN 201710703381A CN 107288546 A CN107288546 A CN 107288546A
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000012546 transfer Methods 0.000 claims abstract description 12
- 238000005553 drilling Methods 0.000 claims description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 2
- 238000011105 stabilization Methods 0.000 claims description 2
- 238000005065 mining Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 3
- 238000007405 data analysis Methods 0.000 description 2
- 238000013480 data collection Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
-
- 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
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- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses the step 1 of the completion method of a kind of horizontal well and horizontal well, the wherein completion method of horizontal well) be used to realize the connection of horizontal well and producing well, step 2) it is used to verifying that horizontal well is connected with the bias of producing well whether meet the requirements.The horizontal segment of horizontal well deviates the axis certain distance of producing well, PE screen casings in horizontal segment also can deviate from axis a certain distance of producing well, the space in the producing well centre position that PE screen casings take reduces, decentralization space is provided for the tubing string in tripping in producing well, tubing string in producing well transferred to predetermined depth, it is ensured that mining operation is smoothed out.After the completion of horizontal well is connected with producing well bias, need to verify whether horizontal well meets the requirements with eccentric connect of producing well, horizontal well connects the satisfactory distance for meaning horizontal well deviation producing well axis with producing well and disclosure satisfy that the PE screen casings in horizontal segment do not influence the tubing string in producing well to transfer to predetermined depth.
Description
Technical field
The present invention relates to coal bed gas technical field, the completion method and horizontal well of more particularly to a kind of horizontal well.
Background technology
For the multi-branched horizontal well for exploiting coal bed methane, horizontal well is connected with producing well, the diameter of producing well
Only 0.5 meter, the spacing of two wells need to could complete the connection of two wells at least at 200 meters by special connection instrument.Existing skill
The connection of the horizontal segment and producing well of horizontal well is crept into generally towards the axis direction of producing well in art, has ensured that horizontal well and life
Produce the connection of well.
After horizontal well is connected with producing well, in horizontal well can tripping in PE screen casings, in producing well also can running string, due to PE
Screen casing has occupied the segment space of producing well, causes in producing well location conflicts between the tubing string of tripping in and PE screen casings, raw
The tubing string of production well is unable to tripping in predeterminated position, and the progress of mining operation is influenceed when serious.
Therefore, the problem of how solving location conflicts between the PE screen casings of horizontal well and the tubing string of producing well, as ability
Field technique personnel technical problem urgently to be resolved hurrily.
The content of the invention
In view of this, the invention provides a kind of completion method of horizontal well, to solve PE screen casings and the production of horizontal well
Between the tubing string of well the problem of location conflicts.Present invention also offers a kind of horizontal well.
To achieve the above object, the present invention provides following technical scheme：
A kind of completion method of horizontal well, including：
Step 1) the eccentric horizontal segment and producing well for connecting horizontal well；
Step 2) verify whether the horizontal well meets the requirements with eccentric connect of the producing well, verify the horizontal well
The distance for deviateing the axis of the producing well meets requirement, then enters and be oriented to operation, verifies that the horizontal well deviates the production
The distance of the axis of well is undesirable, then repeating said steps 1) and the step 2).
It is preferred that, in the completion method of above-mentioned horizontal well, the step 1) include：
Step 11) control drilling tool to creep into the vertical section of the horizontal well and control the drilling tool just to described in target point drilling
The first level section of the horizontal segment of horizontal well；
Step 12) the control drilling tool creeps into the of the horizontal segment towards the direction for deviateing the target point pre-determined distance
Two horizontal segments；
Step 13) the control drilling tool creeps into the 3rd horizontal segment of the horizontal segment, the 3rd horizontal segment and the life
Well bias connection is produced, the 3rd horizontal segment is connectivity points with the position that producing well bias is connected.
It is preferred that, in the completion method of above-mentioned horizontal well, the step 2) include：
Step 21) drilling tool of pulling out of hole is to the casing shoe of the horizontal well；
Step 22) into the producing well running string string to the producing well end；
Step 23) transfer the drilling tool, observation suspending weight change, if suspending weight stabilization, drilling tool is transferred along the horizontal well
To the connectivity points, if suspending weight increase or reduction, above carry the drilling tool, while above carrying the tubing string of the producing well
Then string transfers the drilling tool to the connectivity points, the producing well transfers the tubing string string, determines the pipe to preset height
Whether the position that is hampered of post string, the eccentric throw that is hampered between position and the axis of the producing well described in checking meets the requirements, and tests
Demonstrate,prove the eccentric throw and meet requirement, then enter and be oriented to operation, verify that the eccentric throw is undesirable, then repeating said steps 1)
With the step 2).
It is preferred that, in the completion method of above-mentioned horizontal well, the step 21) also include being located at step 21) before step
Rapid 20) turn on pump circulates back reaming.
It is preferred that, in the completion method of above-mentioned horizontal well, the step 11) and the step 12) in forbid above carrying institute
State drilling tool.
A kind of horizontal well, the completion side opened up using the horizontal well described in any one above-mentioned scheme of the horizontal well
Method.
It can be seen from the above technical proposal that the completion method for the horizontal well that the present invention is provided, including step 1) and step
2), step 1) be used to realize the connection of horizontal well and producing well, step 2) be used to verify that horizontal well is connected with the bias of producing well
Whether meet the requirements.The PE screen casings that the horizontal segment of horizontal well deviates in the axis certain distance of producing well, horizontal segment also will be inclined
From axis a certain distance of producing well, the space in the producing well centre position that PE screen casings take reduces, in being tripping in producing well
Tubing string provide decentralization space so that the tubing string in producing well can be transferred to predetermined depth, it is ensured that mining operation it is smooth
Carry out.Whether meet, it is necessary to verify that horizontal well is connected with the bias of producing well after the completion of horizontal well is connected with producing well bias
It is required that, horizontal well connects the satisfactory distance for meaning horizontal well deviation producing well axis with producing well and disclosure satisfy that level
PE screen casings in section do not influence the tubing string in producing well to transfer to predetermined depth, so as to ensure smoothly entering for mining effect
OK.
Present invention also offers a kind of horizontal well, the water opened up described in any one above-mentioned scheme of use of the horizontal well
The completion method of horizontal well is opened up.Because the completion method of horizontal well has above-mentioned technique effect, pass through the completion side of the horizontal well
The horizontal well that method is opened up also has same technique effect, will not be repeated here.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
The flow chart of the completion method for the horizontal well that Fig. 1 provides for first embodiment of the invention；
The flow chart of the completion method for the horizontal well that Fig. 2 provides for second embodiment of the invention；
The flow chart of the completion method for the horizontal well that Fig. 3 provides for third embodiment of the invention.
Embodiment
The invention discloses a kind of completion method of horizontal well, with solve horizontal well PE screen casings and producing well tubing string it
Between location conflicts the problem of.The invention also discloses a kind of horizontal well.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Refer to Fig. 1-Fig. 3, the flow chart of the completion method for the horizontal well that Fig. 1 provides for first embodiment of the invention；
The flow chart of the completion method for the horizontal well that Fig. 2 provides for second embodiment of the invention；Fig. 3 is third embodiment of the invention
The flow chart of the completion method of the horizontal well of offer.
The invention discloses a kind of completion method of horizontal well, including：
Step 1) the eccentric horizontal segment and producing well for connecting horizontal well；
Step 2) verify whether horizontal well meets the requirements with eccentric connect of producing well, checking horizontal well deviates producing well
The distance of axis, which is met, to be required, then enters and be oriented to operation, and the distance for the axis that checking horizontal well deviates producing well is undesirable,
Then repeat step 1) and step 2).
The horizontal segment of horizontal well is connected with producing well bias, herein it should be noted that eccentric connection refers to horizontal well
Horizontal segment deviates the axis of producing well, and the axis of horizontal segment and the axis of producing well are non-intersect, and axis and the production of horizontal segment
There is a certain distance in the horizontal direction between the axis of well.
The PE screen casings that the horizontal segment of horizontal well deviates in the axis certain distance of producing well, horizontal segment also can deviate from production
Axis a certain distance of well, the space in the producing well centre position that PE screen casings take reduces, and is the tubing string in tripping in producing well
There is provided decentralization space so that the tubing string in producing well can be transferred to predetermined depth, it is ensured that mining operation is smoothed out.
Whether accorded with after the completion of horizontal well is connected with producing well bias, it is necessary to verify that horizontal well is connected with the bias of producing well
Close and require, horizontal well connects the satisfactory distance for meaning horizontal well deviation producing well axis with producing well and disclosure satisfy that water
PE screen casings in flat section do not influence the tubing string in producing well to transfer to predetermined depth, ensure that being smoothed out for mining effect.
Horizontal well deviates the required distance of the axis of producing well：The axial line distance that horizontal well deviates producing well is at least tubing string
The radius sum of radius and PE screen casings.
If the distance that horizontal well deviates the axis of producing well meets production requirement, into guide effect；If level
The distance of axis that well deviates producing well is unsatisfactory for production requirement, then repeat step 1) and step 2), that is, repeat eccentric connection with
Whether the eccentric connection of checking meets the requirements.Only when the distance that horizontal well deviates the axis of producing well meets production requirement, bore
The horizontal completion entered could carry out normal coal-bed gas exploitation, otherwise can reduce the efficiency and yield of coal-bed gas exploitation.
In a specific embodiment of this programme, step 1) specifically include：
Step 11) control the vertical section and control drilling tool of drilling tool drilling horizontal well just creeping into the level of horizontal well to target point
The first level section of section；
Step 12) drilling tool is controlled towards the second horizontal segment of the direction drilling horizontal segment for deviateing target point pre-determined distance；
Step 13) control drilling tool creeps into the 3rd horizontal segment of horizontal segment, and the 3rd horizontal segment and producing well are eccentric to be connected, and the 3rd
Horizontal segment is connectivity points with the position that producing well bias is connected.
Step 1) it is used to realize the connection of horizontal well and producing well, specific connection step includes step 11)-step 13).
Step 11) be used for realize horizontal well vertical section and first level section drilling, and producing well drilling.First
, it is necessary to which drilling tool is just crept into target point in the drilling process of horizontal segment.The drilling situation of underground is understood on well for convenience, preferably
, target point depth tripping in strong magnetic joint, producing well is connected between the drill bit and screw rod of drilling tool inserting tube, strong magnetic joint
For providing the magnetic field to be measured of an alternation, the maximum effective distance of electromagnetic signal is 40-70m, and inserting tube connects for gathering strong magnetic
The magnetic field intensity signal that head is produced, the signal of inserting tube collection reaches ground data acquisition software after treatment and data analysis is soft
After part, azimuth-range of the horizontal well track relative to the target point of producing well is drawn.
Depth of setting, the distance interval of adjacent two data collection and the horizontal well of drilling tool are inputted in data acquisition software
Initial well depth, generally the data of collection are once analyzed by DAS every 3m, in this programme
A specific embodiment in, adjacent two data collection distance at intervals of half meter.
During data acquisition, data receiver software constantly receives the field strength values (Hx, Hy and Hz) of strong magnetic joint, and
The three bars curves on field strength values are generated by DAS, herein it should be noted that needing to ensure three letters
Number curve stops data acquisition, and gathered data again, reforms data analysis without breakpoint when wrong.
In a specific embodiment of this programme, when connection operation starts, the test point distance sleeve footwear of instrument are connected
Distance be less than 8m when, the horizontal well track measured relative to the target point of producing well orientation by the magnetic disturbance of sleeve pipe
Influence is big, and the data now measured cannot function as connecting the Main Basiss of operation, it is necessary to by follow-up measurement data, subsequently take
After several groups of connection data, tool-face position and screw rod build angle rate etc. judge to connect number when operation starts with checking during with reference to drilling
According to reasonability and accuracy, it is then determined that whether the foundation analyzed as final data.
Step 12) be used for horizontal well the second horizontal segment drilling, the drilling of the second horizontal segment needs progressively to deviate target
Point is crept into, after the second horizontal segment drilling terminates, and target point pre-determined distance is deviateed in the end of the second horizontal segment.Second horizontal segment
Realize deviation of the horizontal well relative to producing well.
In a specific embodiment of this programme, operation early stage is connected, first level section, first are just crept into target point
The length of horizontal segment is 12m, then creeps into the second horizontal segment, and the second horizontal segment deviates target point and carries out connection operation, and straight well rises
Data of two group of second horizontal segment relative to the azimuth-range of the target point of producing well are at least analyzed before connection instrument, control is bored
The distance that head deviates target point is 15cm, and last group analysis data calculates the distance for deviateing target point within 15cm then no longer
Carry out orientation adjustment.
It is determined that target point vertical depth when, it is necessary to controlled with reference to the drill bit of drilling tool in the physical location in coal seam into target hang down
It is deep.
The length that drilling tool creeps into i.e. the 3rd horizontal segment during to apart from connectivity points 5m is that drilling tool is carried in 5m, notice, connects engineering
Teacher and orientation engineer's verification downhole data and track data, it is determined that last 5m drilling mode, now the straight well such as horizontal well rises
Go out to connect instrument.If the drilling orientation of horizontal well needs adjustment, using directional drilling mode, the drilling orientation of such as horizontal well
It is not required to adjust orientation, using rotary drilling mode.
In step 11) and step 12) in, it is necessary to data acquisition software gather information analyze, directional well engineering
Bit location hole deviation, orientation, vertical depth, north and south coordinate and the thing for the information prediction horizontal well that teacher gathers according to data acquisition software
Coordinate, and it is supplied to connection engineer；
The data for connecting engineer's information gathered by data acquisition software and being predicted according to orientation engineer are divided
Analysis, data below is provided to orientation well engineer：Distance of the drill bit away from inserting tube, the shaft bottom south new to target azimuth difference, target spot
The new thing coordinate of northern coordinate, target spot and the new vertical depth of target spot；
The data that orientation well engineer is provided according to connection engineer determine the drilling measure of the 3rd horizontal segment, connect instrument
(connection instrument includes underground part and well-surface part, and underground part mainly includes strong magnetic joint and inserting tube, and well-surface part includes number
According to acquisition software and DAS) accuracy of data presented by the horizontal well of orientation well engineer prediction drill bit position
The accuracy for putting hole deviation, orientation, vertical depth, north and south coordinate and thing coordinate is directly affected, and orientation well engineer is needed according to most
The information of new data collection software collection Accurate Prediction shaft bottom orientation as much as possible.
In a specific embodiment of this programme, step 2) include：
Step 21) trip-out drilling tool to horizontal well casing shoe；
Step 22) into producing well running string string to producing well end；
Step 23) drilling tool is transferred along horizontal well, observation suspending weight changes, if suspending weight is stable, drilling tool is transferred to connectivity points,
If suspending weight increases or reduced, drilling tool is above carried, while then the tubing string string for above carrying producing well transfers drilling tool to preset height
To connectivity points, producing well decentralization tubing string string determines the position that is hampered of tubing string string, checking is hampered between position and the axis of producing well
Eccentric throw whether meet the requirements, checking eccentric throw meet require, then enter be oriented to operation, checking eccentric throw it is undesirable,
Then repeat step 1) and step 2).
Step 21) drilling tool can be played a protective role, prevent bit freezing.Due to producing well transfer tubing string string time compared with
Long, drilling tool, which is carried to casing shoe, to be played a protective role to drilling tool, improve the security of drilling tool work.
Step 2) it is used to verify whether horizontal well meets the requirements with eccentric connect of producing well, specifically include step 21)-step
It is rapid 23).
Step 21) and step 22) can carry out simultaneously.
Step 21) also include be located at step 21) before step 20) turn on pump circulation back reaming, facilitate above carrying for drilling tool, keep away
Exempt to break drilling rod during above the carrying of drilling tool.
Step 11) and step 12) in forbid above carrying drilling tool, it is to avoid cause signal acquisition to interrupt due to above carrying drilling tool, collect
During signal, it is desirable to which drilling tool is continuous and at the uniform velocity transfers.
, it is necessary to illustrate with driller on duty during connecting operation, the first level section of horizontal well and the second horizontal segment are normal
If forbidding above carrying drilling tool without special circumstances, it is necessary to need prior notice to connect engineer when above carrying drilling tool during drilling.
The first level section and the second horizontal segment of horizontal well do data point during normal drilling if necessary to above carry drilling tool
Analysis notifies orientation well engineer, it is necessary to connect engineer, is given an order by orientation well engineer and determines above to carry drilling tool to required well depth.
Present invention also offers a kind of horizontal well, the water opened up described in any one above-mentioned scheme of use of the horizontal well
The completion method of horizontal well is opened up.Because the completion method of horizontal well has above-mentioned technique effect, pass through the completion side of the horizontal well
The horizontal well that method is opened up also has same technique effect, will not be repeated here.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (6)
1. a kind of completion method of horizontal well, it is characterised in that including：
Step 1) the eccentric horizontal segment and producing well for connecting horizontal well；
Step 2) verify whether the horizontal well meets the requirements with eccentric connect of the producing well, verify that the horizontal well deviates
The distance of the axis of the producing well, which is met, to be required, then enters and be oriented to operation, verifies that the horizontal well deviates the producing well
The distance of axis is undesirable, then repeating said steps 1) and the step 2).
2. the completion method of horizontal well according to claim 1, it is characterised in that the step 1) include：
Step 11) control drilling tool to creep into the vertical section of the horizontal well and control the drilling tool just to creep into the level to target point
The first level section of the horizontal segment of well；
Step 12) drilling tool is controlled towards the second water of the direction drilling horizontal segment for deviateing the target point pre-determined distance
Flat section；
Step 13) the control drilling tool creeps into the 3rd horizontal segment of the horizontal segment, the 3rd horizontal segment and the producing well
Bias connection, the 3rd horizontal segment is connectivity points with the position that producing well bias is connected.
3. the completion method of horizontal well according to claim 2, it is characterised in that the step 2) include：
Step 21) drilling tool of pulling out of hole is to the casing shoe of the horizontal well；
Step 22) into the producing well running string string to the producing well end；
Step 23) transfer the drilling tool, observation suspending weight change, if suspending weight stabilization, drilling tool is transferred to institute along the horizontal well
Connectivity points are stated, if suspending weight increase or reduction, above carry the drilling tool, while above carrying the tubing string string of the producing well extremely
Preset height, then transfers the drilling tool to the connectivity points, the producing well transfers the tubing string string, determines the tubing string string
The position that is hampered, whether the checking eccentric throw being hampered between position and the axis of the producing well meet the requirements, checking institute
State eccentric throw and meet requirement, then enter and be oriented to operation, verify that the eccentric throw is undesirable, then repeating said steps 1) and institute
State step 2).
4. the completion method of horizontal well according to claim 3, it is characterised in that the step 21) also include being located at step
It is rapid 21) before step 20) turn on pump circulation back reaming.
5. the completion method of horizontal well according to claim 2, it is characterised in that the step 11) and the step 12)
In forbid above carrying the drilling tool.
6. a kind of horizontal well, it is characterised in that the water opened up in use claim 1-5 described in any one of the horizontal well
The completion method of horizontal well.
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| CN108104756A (en) * | 2017-12-15 | 2018-06-01 | 天水电气传动研究所有限责任公司 | A kind of control method of automatic back reaming |
| CN109322618A (en) * | 2018-10-19 | 2019-02-12 | 成都科盛石油科技有限公司 | Heterogeneous shale gas well Reservoir Section finishing drilling method |
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| CN107288546B (en) | 2019-05-03 |
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