CN107060642B - Wellbore trajectory control method for natural alkali deep thin layer multi-connected horizontal well - Google Patents
Wellbore trajectory control method for natural alkali deep thin layer multi-connected horizontal well Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000003513 alkali Substances 0.000 title claims description 21
- 238000004891 communication Methods 0.000 claims abstract description 59
- 238000013461 design Methods 0.000 claims abstract description 24
- 238000005516 engineering process Methods 0.000 claims abstract description 23
- 238000005259 measurement Methods 0.000 claims abstract description 18
- 210000001503 joint Anatomy 0.000 claims abstract description 7
- 238000012937 correction Methods 0.000 claims abstract description 6
- 230000004927 fusion Effects 0.000 claims abstract description 4
- 238000005553 drilling Methods 0.000 claims description 35
- 238000010276 construction Methods 0.000 claims description 16
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 238000005065 mining Methods 0.000 claims description 10
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000002347 injection Methods 0.000 claims description 7
- 239000007924 injection Substances 0.000 claims description 7
- 238000005457 optimization Methods 0.000 claims description 7
- 238000013329 compounding Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000004090 dissolution Methods 0.000 claims description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 4
- 239000011707 mineral Substances 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000010835 comparative analysis Methods 0.000 claims description 3
- 230000007797 corrosion Effects 0.000 claims description 3
- 238000005260 corrosion Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 abstract description 5
- 241001625808 Trona Species 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 208000013407 communication difficulty Diseases 0.000 description 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- 238000010796 Steam-assisted gravity drainage Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010446 mirabilite Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000004083 survival 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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional 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
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/022—Determining slope or direction of the borehole, e.g. using geomagnetism
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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
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
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- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
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- Geochemistry & Mineralogy (AREA)
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- Geophysics And Detection Of Objects (AREA)
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Abstract
The invention discloses a wellbore trajectory control method for a three-way communication horizontal well in a deep layer of trona, which is characterized by comprising the following steps of: (1) optimizing the design of the rail section of the double-communication horizontal well; (2) error correction techniques; (3) LWD and RMRS fusion measurement and well track accurate control technology. The difficult problem of the profile design of the deep double-communication horizontal well is solved; the conventional LWD measuring instrument and the introduced RMRS measuring technology are adopted, the 'needle threading and wire leading' are realized through the fine control of a well track, two straight well bores with phi 118mm and phi 105mm are communicated at the vertical depths of 2981m and 3013m and the inclined depths of 3239.5m and 3512.6m at one stroke, and the 'point-to-point' butt joint is successfully realized.
Description
Technical Field
The invention belongs to the technical field of trona exploitation, and particularly relates to a method for controlling a wellbore trajectory of a trona deep thin layer multi-connected horizontal well.
background
the directional butt-joint communication well technology is a special technology developed in recent years, and at present, China is mainly used for mining soluble well mineral resources and coal bed gas. The directional well horizontal well technology is adopted, two or more boreholes are directionally butted and communicated at a certain depth of hundreds of meters or even kilometers, and the multi-well communication efficient mining technology is realized. With the progress of the directional horizontal well technology and the measuring tool instrument, point-to-point communication between the well hole and the borehole becomes possible, and the method is widely popularized and applied to high-efficiency exploitation in the fields of alkali and salt extraction and the like. At present, domestic communication technology is mostly applied to coal bed gas resources, the alkali mine utilization communication technology is few, and the utilization of the double communication technology is not precedent. The drilling matching technology of the communicated horizontal well provides powerful technical support for alkali resource exploitation, and meanwhile, the communicated well technology is widely applied to the field of shale gas exploitation, so that the survival and development space of the drilled well must be expanded by researching and applying the technology, and the technology has strong guiding significance on the high-efficiency exploitation technology (double-layer horizontal well) of the heavy oil steam assisted Gravity drainage (Steamassistance Gravity Drive) in the oil field.
the following difficulties mainly exist in the control of the well track:
1. The section design is difficult:
The design section of the horizontal well of the alkali well is different from that of a common horizontal well, the A, B target entry direction is required to be consistent, the design target point 80m before the communicated target point is required to be stably inclined, and when the designed target point is inconsistent with a target point measured by an RMRS instrument, the capacity (build rate) of a build tool is required to be kept to adjust the track of the communicated control section;
2. The requirement for accurate control of the well track is high:
And (3) performing fine control on the well track, constructing according to the designed track strictly before communication, if the deviation from the designed track is far, the deviation from the communicated target is large after the communication with the communicated RMRS instrument, the tool capacity cannot adjust the well track to the communicated target point, and backfilling and sidetracking are required to achieve the communication purpose. Two vertical wells are communicated in a deep layer of about 3000 meters, the diameters of well bores of the two vertical wells are small, namely the well bores with phi 118mm and the well bores with phi 105mm, and the two vertical wells are communicated with the wells accurately in a point-to-point manner; the method comprises the following steps that a vertical well is deep, the accumulated error of well data is large, the accuracy of the data directly determines whether one-time communication can be achieved, the error of target spot data is large, track adjustment cannot be achieved, communication failure is caused, and a sidetracking drill needs to be backfilled for a certain distance;
3. The communicated target well is small, and the communication difficulty is high:
In terms of reducing the communication difficulty, the diameter of the solution cavity is increased to more than half a meter after a groove (solution cavity expansion) is built, so that point-to-point communication between two wells is facilitated; however, the solution cavity is too large after the groove is built, the underground is unsafe when the point A is passed, and the solution cavity is easy to be blocked, so that the groove (the solution cavity is expanded) is not built, the drilled phi 118mm and phi 105mm boreholes are directly communicated by a new drilled phi 216mm borehole, the target point is too small, and the 'point-to-point' communication construction difficulty is high.
Disclosure of Invention
the method solves the problems of profile design and fine track control of deep horizontal well communication, realizes accurate point-to-point communication and butt joint, improves the once success rate of butt joint, and forms a set of well track control method of the trona deep thin layer multi-communication horizontal well.
in order to achieve the purpose, the invention adopts the technical scheme that: the method for controlling the well track of the natural alkali deep thin layer multi-connected horizontal well is characterized by comprising the following steps of:
(1) Optimization design of rail profile of double-communication horizontal well
aiming at the characteristic of the depth of a target layer of an alkali mine, the section design of the double-communication horizontal well is optimized by combining the engineering condition so as to reduce the construction difficulty;
(2) Error correction technique
At 2500-. Firstly, the data of the drilled well is corrected, the track measurement data of two vertical wells, the coordinates of the well mouth and the correction error of the ground altitude are used for carrying out error analysis on the data of the target well, the main sources of the data of the target well are a magnetic single-multipoint inclinometer, an electric continuous inclinometer and an electronic single-multipoint inclinometer, and the data have human errors and system errors. The artificial error can be reduced to an instrument precision range through rechecking, well body track data of the directional well in the precision range is calculated according to the type of the measuring instrument, the horizontal displacement and vertical depth error range caused by the instrument precision is analyzed, and high-precision gyroscope is carried out on the old well to obtain well logging eye track inclined data, so that the horizontal displacement precision error of the target well is calculated, and the error is reduced as far as possible before the well position is determined and construction is carried out. Secondly, the construction well uses a high-precision LWD measurement-while-drilling instrument to monitor the well track of the construction well, reduces the measurement deviation with the designed track, enters an RMRS (rotating magnetic ranging system) 100 meters before a communication point to establish communication with a target as early as possible, corrects the accumulated deviation of the drilling well and ensures accurate communication;
(3) LWD and RMRS fusion measurement and well track accurate control technology
aiming at the difficulties of loose deep alkali layer of alkali mine, easy corrosion of stratum, difficult mastering of drilling tool inclination making law and the like, the optimization of an inclination making tool and an LWD (logging while drilling) measuring instrument is carried out, the accurate monitoring and control of a well track are ensured, the prediction precision of well inclination and direction of a well bottom is improved, more accurate well bottom data information is provided for an RMRS (remote measurement system), the RMRS can feed back more accurate relative coordinates, the well track is accurately guided to advance towards a target point, and point-to-point accurate communication is realized.
The directional butt-joint communicated well technology realizes the direct butt-joint communication of two or more wells in a target production layer: the injection, dissolution and mining are integrated, the contact area of water injection and mineral deposit is large, the yield and the content of alkaline water are high, the ore control area is large, the resource utilization rate is high, the production management of the mining well is simple, and the pollution to the ground and the stratum is small.
the wellbore trajectory control technique includes:
(1) straight well section control
The vertical well section of the horizontal communicating well adopts double-supporting screw drilling to adjust the well inclination direction at any time. Controlling well deviation before a deviation point, controlling the closing distance within 30m of a design range, and enabling the closing direction to fall on a direction line which is favorable for matching with a design track as far as possible;
(2) Deflecting segment control
through comparative analysis, the single 1.25-degree screw can ensure the build-up rate and adopt a mode of compounding half roots and sliding half roots, the well track is ensured to be smooth, and the effects of fast drilling and drilling strictly according to a designed section are achieved. Well deviation and direction are consistent with the design, which is beneficial to the next communication construction;
(3) fine control of wellbore trajectory while communicating
The well track is accurately controlled to run along a design line, the communication and butt joint requirements are accurate for predicting the well inclination and the azimuth at the bottom of the well, so that the performance (the build-up rate during sliding and the increase and decrease inclination during compounding) of a drilling tool is required to be accurately mastered, the influence on the accurate guidance of the RMRS when the prediction deviation is large is avoided, when the drilling is carried out to about 100m before the A target, an RMRS instrument is put into the well to be communicated, and meanwhile, the accurate predicted well inclination, azimuth, vertical depth, relative north coordinates and relative east coordinates of the well are provided for an RMRS engineer; the relative distance and the deviation angle of the target point relative to the drill bit (the strong magnetic short section) are calculated through software after RMRS measurement of the vertical well, a directional engineer is guided to adjust the track according to feedback data, drilling is continued after the azimuth is adjusted, communication measurement is performed once when drilling is carried out for 5-10 m, and the process is repeated, the track of the well hole is continuously adjusted to enable the drill bit to be aligned with a target well hole, so that point-to-point communication and needle threading and leading wire communication are achieved.
Adopt above-mentioned technical scheme's beneficial effect: the invention technology is applied to HV027-8 wells of the applicant, and the HV027-8 wells are the first mining alkali double-communication horizontal wells of an Anhui alkali mine arrangement. The well is a three-opening well body structure, a technical casing (with the lower depth of 1500 meters) is used for sealing an upper gushing mirabilite layer, a phi 216mm well hole is formed in three openings, the well depth is 3504m, the deflecting point is 2700m, the maximum well deflection is 83.47 degrees, the A target distance well mouth is 387m, the vertical depth is 2981.9 m and is communicated with a VT012-8 well phi 118mm well hole, the B target distance well mouth is 657m, and the vertical depth is 3013m and is communicated with a VT013-8 alkali well phi 105mm well hole. Through comprehensive technology optimization implementation, two vertical wells are successfully communicated at one stroke: HV027-8 well phi 216mm well is communicated with A target VT012-8 well phi 118mm well at well depth 3239.5m, and is communicated with B target VT013-8 well phi 105mm well at well depth 3512.6m, so that point-to-point butt joint is successfully realized, integration of injection, dissolution and mining is realized, large displacement, three communication, ultra-long horizontal section, high drilling rate, high yield, good quality, large single well control area, high resource utilization rate, small pollution to the ground and stratum, and good effect and remarkable economic and social benefits are obtained; the primary deep hole phi 216mm in China is accurately communicated with the hole phi 108mm and the hole phi 105mm at one time; HV027-8 well communication was successful only for 62 days, and the sum of 83 days for direct well guidance was 28.5 days earlier than the design 112.5 days. The yield of the alkali mine is also largeThe width is improved: vertical well single well daily production liquid (after-fracturing effect) 500m3and the production fluid after connection (without fracturing) is 1000m3the production efficiency is 2 times of that of a single straight well, and the production effect is better.
Detailed Description
The wellbore trajectory control method for the three-way communication horizontal well in the deep layer of the trona is characterized by comprising the following steps of:
(1) Optimization design of rail profile of double-communication horizontal well
Aiming at the characteristic of the depth of a target layer of an alkali mine, the section design of the double-communication horizontal well is optimized by combining the engineering condition so as to reduce the construction difficulty;
(2) Error correction technique
At 2500-. Firstly, the data of the drilled well is corrected, the track measurement data of two vertical wells, the coordinates of the well mouth and the correction error of the ground altitude are used for carrying out error analysis on the data of the target well, the main sources of the data of the target well are a magnetic single-multipoint inclinometer, an electric continuous inclinometer and an electronic single-multipoint inclinometer, and the data have human errors and system errors. The artificial error can be reduced to an instrument precision range through rechecking, well body track data of the directional well in the precision range is calculated according to the type of the measuring instrument, the horizontal displacement and vertical depth error range caused by the instrument precision is analyzed, and high-precision gyroscope is carried out on the old well to obtain well logging eye track inclined data, so that the horizontal displacement precision error of the target well is calculated, and the error is reduced as far as possible before the well position is determined and construction is carried out. Secondly, the construction well uses a high-precision LWD measurement-while-drilling instrument to monitor the well track of the construction well, reduces the measurement deviation with the designed track, enters an RMRS (rotating magnetic ranging system) 100 meters before a communication point to establish communication with a target as early as possible, corrects the accumulated deviation of the drilling well and ensures accurate communication;
(3) LWD and RMRS fusion measurement and well track accurate control technology
Aiming at the difficulties of loose deep alkali layer of alkali mine, easy corrosion of stratum, difficult mastering of drilling tool inclination making law and the like, the optimization of an inclination making tool and an LWD (logging while drilling) measuring instrument is carried out, the accurate monitoring and control of a well track are ensured, the prediction precision of well inclination and direction of a well bottom is improved, more accurate well bottom data information is provided for an RMRS (remote measurement system), the RMRS can feed back more accurate relative coordinates, the well track is accurately guided to advance towards a target point, and point-to-point accurate communication is realized.
The directional butt-joint communicated well technology realizes the direct butt-joint communication of two or more wells in a target production layer: the injection, dissolution and mining are integrated, the contact area of water injection and mineral deposit is large, the yield and the content of alkaline water are high, the ore control area is large, the resource utilization rate is high, the production management of the mining well is simple, and the pollution to the ground and the stratum is small.
The wellbore trajectory control technique includes:
(1) controlling a straight well section: the vertical well section of the horizontal communicating well adopts double-supporting screw drilling to adjust the well inclination direction at any time. Controlling well deviation before a deviation point, controlling the closing distance within 30m of a design range, and enabling the closing direction to fall on a direction line which is favorable for matching with a design track as far as possible;
(2) controlling a deflecting section: through comparative analysis, the single 1.25-degree screw can ensure the build-up rate and adopt a mode of compounding half roots and sliding half roots, the well track is ensured to be smooth, and the effects of fast drilling and drilling strictly according to a designed section are achieved. Well deviation and direction are consistent with the design, which is beneficial to the next communication construction;
(3) fine control of wellbore trajectory while communicating: the well track is accurately controlled to run along a design line, the communication and butt joint requirements are accurate for predicting the well inclination and the azimuth at the bottom of the well, so that the performance (the build-up rate during sliding and the increase and decrease inclination during compounding) of a drilling tool is required to be accurately mastered, the influence on the accurate guidance of the RMRS when the prediction deviation is large is avoided, when the drilling is carried out to about 100m before the A target, an RMRS instrument is put into the well to be communicated, and meanwhile, the accurate predicted well inclination, azimuth, vertical depth, relative north coordinates and relative east coordinates of the well are provided for an RMRS engineer; the relative distance and the deviation angle of the target point relative to the drill bit (the strong magnetic short section) are calculated through software after RMRS measurement of the vertical well, a directional engineer is guided to adjust the track according to feedback data, drilling is continued after the azimuth is adjusted, communication measurement is performed once when drilling is carried out for 5-10 m, and the process is repeated, the track of the well hole is continuously adjusted to enable the drill bit to be aligned with a target well hole, so that point-to-point communication and needle threading and leading wire communication are achieved.
Claims (1)
1. a well track control method for a natural alkali deep thin layer multi-connected horizontal well is characterized by comprising the following steps:
(1) optimization of rail profile of double-communication horizontal well
Aiming at the characteristic of the depth of a target layer of an alkali mine, the profile design of a multi-connected horizontal well is optimized by combining the engineering condition so as to reduce the construction difficulty;
(2) error correction
At 2500-,
firstly, correcting drilled well data, correcting errors of track measurement data of two vertical wells, well head coordinates and ground elevation, carrying out error analysis on the data of a target well, wherein the main sources of the data of the target well are a magnetic single-multipoint inclinometer, an electric continuous inclinometer and an electronic single-multipoint inclinometer, the data have artificial errors and system errors, the artificial errors can be reduced to an instrument precision range through rechecking, well body track data of a directional well in the precision range can be calculated according to the type of a measuring instrument, the error range of horizontal displacement and vertical depth caused by instrument precision is analyzed, and a high-precision gyroscope is carried out on an old well to obtain track inclination data of the well logging eye, so that the horizontal displacement precision error of the target well is calculated, and the errors are reduced as far as possible before well position determination and construction are carried out; secondly, the construction well monitors the well track of the construction well by using a high-precision LWD (logging while drilling) measuring instrument, reduces the measurement deviation with the designed track, enters a rotating magnetic distance measuring system RMRS (remote monitoring system) 100 meters before a communication point to establish communication with a target as early as possible, corrects the accumulated deviation of the drilling well and ensures accurate communication;
(3) LWD and rotary magnetic ranging system RMRS fusion measurement and well track accurate control technology
Aiming at the problems of loose deep alkali layer of alkali mine, easy corrosion of stratum and difficult mastering of drilling tool inclination-making law, the optimization of an inclination-making tool and an LWD (logging while drilling) measuring instrument is carried out, the well track is accurately monitored and controlled, the prediction precision of well inclination and azimuth at the bottom of a well is improved, more accurate bottom-hole data information is provided for a rotary magnetic distance measuring system RMRS, the rotary magnetic distance measuring system RMRS can feed back more accurate relative coordinates, the well track is accurately guided to advance towards the target direction, and point-to-point accurate communication is realized;
The directional butt-joint communicated well technology realizes the direct butt-joint communication of two or more wells in a target production layer: the injection, dissolution and mining are integrated, the contact area of water injection and mineral deposit is large, the yield and the content of alkaline water are high, the ore control area is large, the resource utilization rate is high, the production management of a mining well is simple, and the pollution to the ground and the stratum is small; the wellbore trajectory control technique includes:
(1) Controlling a straight well section: drilling a straight well section of the horizontal communication well by adopting a double-supporting screw rod, adjusting the well deviation direction at any time, controlling the well deviation before a deviation point, controlling the closing distance within 30m of a design range, and enabling the closing direction to fall on a direction line which is favorable for matching with a design track as far as possible;
(2) Controlling a deflecting section: through comparative analysis, the single 1.25-degree screw can ensure the build-up rate and adopt a mode of compounding half roots and sliding half roots, the well track is ensured to be smooth, the effects of fast drilling and drilling strictly according to a designed section are achieved, the well deviation and the direction are consistent with the design, and the next-step communication construction is facilitated;
(3) fine control of wellbore trajectory while communicating: the well track is accurately controlled to run along a design line, the communication and butt joint requirements are accurate for predicting well deviation and azimuth at the bottom of a well, the performance of the build-up rate when a drilling tool slides and the performance of the increase and decrease deviation conditions during compounding are accurately mastered, the influence on the accurate guidance of RMRS when the prediction deviation is large is avoided, when the drilling tool is drilled to about 100m before an A target, an RMRS instrument is put into the well to be communicated, and meanwhile, more accurate predicted well deviation, azimuth, vertical depth, relative north coordinates and relative east coordinates at the bottom of the well are provided for an RMRS engineer; the relative distance and the deviation angle of the target point relative to the drill bit (the strong magnetic short section) are calculated through software after RMRS measurement of the vertical well, a directional engineer is guided to adjust the track according to feedback data, drilling is continued after the azimuth is adjusted, communication measurement is performed once when drilling is carried out for 5-10 m, and the process is repeated, the track of the well hole is continuously adjusted to enable the drill bit to be aligned with a target well hole, so that point-to-point communication and needle threading and leading wire communication are achieved.
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| CN109057768A (en) * | 2018-08-02 | 2018-12-21 | 四川盐业地质钻井大队 | Recovery method suitable for thin interbed native soda deposit |
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| 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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| CN103472484B (en) * | 2013-09-18 | 2016-08-17 | 西南石油大学 | Horizontal well path optimization method based on RS three-dimensional sensitive earthquake attributive analysis |
| CN103510855B (en) * | 2013-10-17 | 2015-11-04 | 中国石油集团渤海钻探工程有限公司 | A kind of horizontal well logging guide track optimization method |
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