CN115096492B - Deep oil and gas reservoir drilling type stress relief method crustal stress measuring device and method - Google Patents
Deep oil and gas reservoir drilling type stress relief method crustal stress measuring device and method Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 66
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- 239000011435 rock Substances 0.000 claims abstract description 22
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- 238000005516 engineering process Methods 0.000 description 2
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- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0047—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes measuring forces due to residual stresses
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- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
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Abstract
The invention belongs to the technical field of drilling type stress measurement of oil and gas reservoirs, and particularly relates to a deep oil and gas reservoir drilling type stress relief method crustal stress measurement device and method, aiming at an oil and gas reservoir, the device measures stress data of a target position after drilling to the target position, and particularly comprises the following steps: a measuring drilling mechanism and a releasing drilling mechanism; the measuring drilling mechanism is provided with an inner cylinder and a measuring module connected with the inner cylinder, the inner cylinder is configured to be capable of drilling downwards to form a measuring hole, the measuring module is driven by the inner cylinder to move to a target point of the measuring hole, the measuring module comprises a measuring contact pin, and a contact of the measuring contact pin faces outwards and can transversely stretch and retract to measure aperture data of the target point; the drill releasing mechanism comprises an outer cylinder, the outer cylinder is covered on the inner cylinder, the outer cylinder is configured to be capable of drilling downwards to form a releasing hole, and a rock body with released stress is arranged between the releasing hole and the measuring hole. This scheme is through once transferring equipment, once only creeps into and accomplishes the whole actions of measurement relief, and applicable in deep layer and super deep oil gas reservoir have improved the operating efficiency.
Description
Technical Field
The invention belongs to the technical field of drilling type stress measurement of oil and gas reservoirs, and particularly relates to a device and a method for measuring the ground stress of a deep oil and gas reservoir by a drilling type stress relief method.
Background
Complex stress exists in a hydrocarbon reservoir, and whether the stress is theoretically researched or applied to engineering, the stress state in the reservoir needs to be quantitatively determined. The magnitude and direction of the crustal stress are one of important bases for reasonably arranging oil and gas exploitation and drilling, and the technical difficulty, technical scheme and economic benefit of oil and gas reservoir transformation are directly restricted. Particularly, oil and gas reservoirs in China experience multi-phase tectonic movement, fault and natural fracture zone development, stratum formation and tectonic stress states are complex and are influenced by various geological factors, and a stress field in the oil and gas reservoirs is a very inhomogeneous stress field, so that the uncertainty of oil and gas single well yield is increased, and the risk of oil and gas exploration and development is increased.
Drilling is the most direct mode for deep rock mass detection, and currently, the method for testing the crustal stress of the oil and gas reservoir mainly comprises an imaging logging drilling collapse method, a hydraulic fracturing method and the like. The imaging logging borehole collapse method depends on the existence of a borehole collapse section, the obtained advantageous collapse direction and collapse parameters (collapse depth and width) are greatly influenced by factors such as slurry in a hole, the determination of stress and orientation is greatly influenced by the anisotropy of a rock mass, and the calculation result of the stress is unreliable. The stress direction of the hydraulic fracturing method is difficult to determine, after hydraulic fracturing, the direction of a fracture is determined through technologies such as a die plate, optical imaging, ultrasonic imaging and electronic imaging, the fracture is influenced by factors such as slurry in a hole and primary fractures, and the success rate of determining the stress direction of the hydraulic fracturing method is low.
The stress relief method is the test method which has the longest development time, the most mature technology and the most reliable result.
The drilling equipment and the measuring equipment of the existing stress relief method are independent, and measurement is carried out after drilling is finished, so that the whole process involves more steps: the drilling equipment drills downwards, after drilling is finished, the drilling equipment is lifted, after the drilling equipment is removed, the measuring equipment is put downwards, and the whole testing process is very complex.
Moreover, the measuring method is only suitable for measuring the stress of the shallow oil and gas reservoir and is not suitable for measuring the stress of the deep oil and gas reservoir, because once the measuring hole is too long, the measurement equipment cannot be ensured to be lowered along the original drilling hole due to the deflection problem, and therefore large errors exist.
How to break through the above-mentioned problem that troubles the stress relief method for a long time, realize the high-efficient stress test of deep hole and ultra-deep hole is the important direction of ground stress test technical development.
Disclosure of Invention
The scheme provides a deep oil and gas reservoir drilling type stress relief method crustal stress measuring device and method, and solves the technical problems that an existing measuring method is only suitable for measuring shallow oil and gas reservoir stress, the measuring process is complex and the like.
The scheme provides a deep oil and gas reservoir stress relief drilling type ground stress measuring device,
the method comprises the following steps: a measuring drilling mechanism and a releasing drilling mechanism;
the measuring and drilling mechanism is provided with an inner cylinder and a measuring module connected with the inner cylinder, the inner cylinder is configured to be capable of drilling downwards to form a measuring hole, the measuring module is driven by the inner cylinder to move to a target point of the measuring hole, the measuring module comprises a measuring contact pin, and a contact of the measuring contact pin faces outwards and can transversely stretch and retract to measure aperture data of the target point;
the drill releasing mechanism comprises an outer cylinder, the outer cylinder is covered on the inner cylinder, the outer cylinder is configured to be capable of drilling downwards to form a releasing hole, and a stress-released rock body is arranged between the releasing hole and the measuring hole.
Still further, the measurement stylus includes an elastic expansion and contraction portion and a contact head, the measurement stylus having a measurement state and a retracted state;
in a retraction state, the contact retracts under the blocking action of a sliding sleeve block arranged outside the inner cylinder, and the elastic telescopic part retracts to store energy;
under the measuring state, the measuring contact pin moves downwards to the position where the contact is far away from the sliding sleeve block so as to remove the blocking effect of the sliding sleeve block, and the contact extends out under the elastic action of the elastic telescopic part.
Furthermore, the measuring module further comprises a main body, the main body is of an annular structure, a plurality of through telescopic holes are distributed in the main body along the radial direction in an annular array mode, the measuring contact pins are arranged in the telescopic holes, and the contacts of the contact pins face outwards.
Furthermore, the measuring drilling mechanism further comprises a first positioning mechanism, the first positioning mechanism is positioned in the inner cylinder through a first limit pin inserted in the side wall of the inner cylinder, and the first positioning mechanism is arranged above the measuring module;
the first positioning mechanism comprises a first ball seat, and the first ball seat is provided with a through hole with the diameter gradually reduced from top to bottom;
the first positioning mechanism is configured to release the limiting relation between the first positioning mechanism and the inner cylinder by cutting the first limiting pin under the impact of the first ball when the first ball is thrown into the first ball seat.
Furthermore, a digital compass, a data memory and a measuring hole drill bit are sequentially arranged below the measuring module.
Furthermore, the drilling relieving mechanism is provided with a second positioning mechanism, the second positioning mechanism is positioned in the outer cylinder through a second limit pin inserted in the inner wall of the outer cylinder, and the second positioning mechanism is arranged above the inner cylinder.
Further, in the case of a liquid crystal display device,
the second positioning mechanism comprises a second ball seat, and the second ball seat is provided with a through hole with the diameter gradually reduced from top to bottom;
the second positioning mechanism is configured to release the position-restricting relationship between the second positioning mechanism and the outer cylinder by cutting the second stopper pin by an impact of the second ball when the second ball is dropped into the second ball seat.
Furthermore, the upper part of the outer barrel is connected with a drill rod joint, the outer wall of the outer barrel is provided with a stepped structure, and the lower end of the drill rod joint is connected with the stepped structure;
and a hole removing drill bit is further arranged at the lower part of the outer barrel.
A method for measuring the geostress by a deep oil and gas reservoir stress relieving method comprises the following steps:
s1: the measuring drilling mechanism drills downwards to form a measuring hole, and a measuring module of the drilling mechanism measures position data of the measuring hole;
s2: the drill releasing mechanism drills downwards to form a releasing hole so as to release the stress of the rock stratum between the measuring hole and the releasing hole, and the measuring module measures the position data of the measuring hole after the stress is released.
Further, the method comprises the following steps:
a first ball body is put into the first ball seat, a first limiting pin for connecting the inner cylinder and the first ball seat is cut off, so that the limiting relation between the first ball seat and the inner cylinder is released, the first ball seat drives the measuring module to move downwards, a measuring contact pin of the measuring module is changed from a retraction state to a measuring state, and the measuring contact pin measures first position data of the measuring hole;
and a second ball body is put into the second ball seat, and a second limiting pin for connecting the outer barrel and the second ball seat is cut off, so that the limiting relation between the second ball seat and the outer barrel is relieved, the second ball seat drills downwards to form a relief hole, the stress of a rock body between the relief hole and the measuring hole is relieved, and the measuring module measures second position data of the measuring hole after the stress is relieved.
Analyzing the technical effect:
the invention provides a deep oil and gas reservoir stress relief drilling type ground stress measuring device, which comprises: a measuring drilling mechanism and a drilling relieving mechanism;
the measuring drilling mechanism is provided with an inner cylinder and a measuring module connected to the inner cylinder, the inner cylinder is configured to be capable of drilling downwards to form a measuring hole, the measuring module is driven by the inner cylinder to move to a target point of the measuring hole, the measuring module comprises a measuring contact pin, and a contact of the measuring contact pin faces outwards and can transversely stretch and retract to measure aperture data of the target point;
the drill releasing mechanism comprises an outer cylinder, the outer cylinder is covered on the inner cylinder, the outer cylinder is configured to be capable of drilling downwards to form a releasing hole, and a stress-released rock body is arranged between the releasing hole and the measuring hole.
The measuring steps of the measuring device are as follows:
s1: the measuring drilling mechanism drills downwards to form a measuring hole, and a measuring module of the drilling mechanism measures first position data of the measuring hole; specifically, the first position data of the target point position of the measuring hole is measured by measuring the transverse extension of the contact pin to the wall of the measuring hole
S2: the measurement module measures second position data of the measurement hole after stress relief, specifically, the measurement contact pin transversely extends to abut against the hole wall of the measurement hole, and therefore second position data of the measurement hole corresponding to the rock body after stress relief are measured and obtained.
The calculation principle of the scheme is specifically that the direction of the ground stress is determined according to shape characteristics and rock mechanical parameters before and after the stress on the section of the measuring hole is relieved, according to the elastic mechanical theory and direction information acquired by a digital compass, and the size of the ground stress is calculated in such a way.
This scheme is through once transferring equipment, once only creeps into and accomplishes the whole actions of measurement relief, and applicable in deep layer and super deep oil gas reservoir have improved the operating efficiency.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
FIG. 1 is a cross-sectional view of the overall structure of a ground stress measuring device according to an embodiment of the present invention
Fig. 2 is a schematic overall structural diagram of a ground stress measuring device according to an embodiment of the present invention;
FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 2;
fig. 4 is a schematic view of the overall structure of the measuring stylus;
FIG. 5 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 4;
FIG. 6 is a schematic diagram of the overall structure of the measurement module;
FIG. 7 is a schematic cross-sectional view B-B of FIG. 6;
FIG. 8 is a schematic cross-sectional view of C-C of FIG. 6;
FIG. 9 is a schematic view of the contacts of the measurement stylus being restrained in a retracted state by the sliding sleeve stops;
FIG. 10 is a schematic diagram of the state of the measurement device in step S1 of the deep hydrocarbon reservoir stress relieving method for geostress measurement;
FIG. 11 is a schematic diagram of the state of the measurement device in step S2 of the deep hydrocarbon reservoir stress relief method of geostress measurement;
FIG. 12 is a step diagram of a method for measuring ground stress according to an embodiment of the present invention;
FIG. 13 is a schematic diagram showing the change of the position of the measurement point before and after stress relief.
Description of the reference numerals:
100-measuring the drilling mechanism; 200-releasing the drilling mechanism; 110-an inner cylinder; 120-a measurement module; 130-sliding sleeve block; 140-a first positioning mechanism; 150-a digital compass; 160-a data memory; 170-measuring the hole bit; 121-measuring stylus; 1211-elastic expansion part; 1212-a contact; 122-a body; 141-a first limit pin; 142-a first ball seat; 143-a first sphere; 210-an outer barrel; 220-a second positioning mechanism; 230-a drill pipe joint; 240-relief hole drill; 221-a second limit pin; 222-a second ball seat; 223-second sphere.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
The invention will be further illustrated with reference to the following examples, with reference to the accompanying figures 1-13.
Example one
The embodiment provides a deep hydrocarbon reservoir stress relief drilling type ground stress measuring device, which comprises: the survey drilling mechanism 100 and the release drilling mechanism 200;
the measurement drilling mechanism 100 is provided with an inner cylinder 110 and a measurement module 120 connected to the inner cylinder 110, the inner cylinder 110 is configured to be capable of drilling downwards to form a measurement hole, the measurement module 120 is driven by the inner cylinder 110 to move to a target point of the measurement hole, the measurement module 120 comprises a measurement contact pin 121, and a contact 1212 of the measurement contact pin 121 faces outwards and can transversely stretch and retract to measure aperture data of the target point;
the drill relieving mechanism 200 includes an outer cylinder 210, the outer cylinder 210 is housed in the inner cylinder 110, the outer cylinder 210 is disposed so as to be capable of drilling down to a rock body in which a relieving hole is formed, and stress is relieved between the relieving hole and the measuring hole.
The measuring steps of the measuring device are as follows:
s1: the measurement drilling mechanism 100 drills downwards to form a measurement hole, and a measurement module 120 of the drilling mechanism measures first position data of the measurement hole; specifically, the first position data of the target point of the measuring hole is measured by the measuring stylus 121 transversely extending to abut against the hole wall of the measuring hole
S2: the drill releasing mechanism 200 drills downwards to form a releasing hole so as to release the stress of the rock stratum between the measuring hole and the releasing hole, and the measuring module 120 measures second position data of the measuring hole after the stress is released, specifically, the measuring contact pin 121 transversely extends to abut against the wall of the measuring hole, so that second position data of the measuring hole corresponding to the rock body after the stress is released are measured and obtained.
The calculation principle of the scheme is specifically that the direction of the ground stress is determined according to shape characteristics and rock mechanical parameters before and after the stress on the section of the measuring hole is relieved, according to the elastic mechanical theory and direction information acquired by a digital compass, and the size of the ground stress is calculated in such a way.
This scheme is through once transferring equipment, once only creeps into and accomplishes the whole actions of measuring and removing, and applicable in deep layer and super deep layer oil gas reservoir have improved the operating efficiency.
Regarding the shape and structure of the measurement module 120, specifically:
the measuring module 120 comprises a measuring stylus 121, see fig. 4 and 5, the measuring stylus 121 comprising an elastic expansion 1211 and a contact 1212, the measuring stylus 121 having a measuring state and a retracted state;
in the retracted state, the contact 1212 retracts under the blocking action of the sliding sleeve barrier 130 arranged outside the inner cylinder 110, and the elastic expansion part 1211 retracts to store energy;
in the measuring state, the measuring contact pin 121 moves down to the contact 1212 away from the sliding grid 130 to release the blocking effect of the sliding grid 130, and the contact 1212 extends under the elastic force of the elastic expansion 1211. With respect to the sliding grid 130, referring to fig. 9, the sliding grid 130 is specifically configured as a circular ring structure, when the measuring stylus 121 is blocked by the sliding grid 130, the measuring stylus 121 is retracted, and when the measuring stylus 121 moves down to be away from the sliding grid 130, the measuring stylus 121 is ejected under the driving force of the elastic expansion 1211.
Preferably, the elastic expansion 1211 is provided in a spring structure, and the spring is fitted to the shaft of the stylus.
Preferably, the measuring stylus 121 further includes a core and a multi-stage coil, wherein the core is located at an upper portion of the spring, the multi-stage coil is located at a lower portion of the spring, and the core and the multi-stage coil are both located in an outer cylinder 210.
The measurement module 120 further includes a main body 122, the main body 122 is configured as an annular structure, the main body 122 is annularly provided with a plurality of through telescopic holes along the radial direction, the telescopic holes are provided with measurement contact pins 121, and contacts 1212 of the contact pins face outward. See fig. 7 and 8 for details.
In an alternative to this embodiment, it is preferable that,
the measuring drilling mechanism 100 further comprises a first positioning mechanism 140, the first positioning mechanism 140 is positioned inside the inner cylinder 110 through a first limit pin 141 inserted into the side wall of the inner cylinder 110, and the first positioning mechanism 140 is arranged above the measuring module 120;
the first positioning mechanism 140 includes a first ball seat 142, and the first ball seat 142 is provided with a through hole whose diameter is gradually reduced from top to bottom;
the first positioning mechanism 140 is configured to release the first positioning mechanism 140 from the inner cylinder 110 by cutting the first stopper pin 141 by the impact of the first ball 143 when the first ball 143 is dropped on the first ball seat 142. After the first ball 143 is dropped, the first ball seat 142 moves down to drive the measuring module 120 to move down, and the measuring module 120 moves down to separate from the blocking effect of the sliding grid 130, and then the measuring stylus 121 is ejected.
In an alternative to this embodiment, it is preferable that,
a digital compass, a data memory 160 and a measuring hole drill 170 are sequentially arranged below the measuring module 120.
Regarding the shape and structure of the depoling mechanism 200, specifically:
the drill releasing mechanism 200 is provided with a second positioning mechanism 220, the second positioning mechanism 220 is positioned inside the outer cylinder 210 by a second stopper pin 221 inserted into the inner wall of the outer cylinder 210, and the second positioning mechanism 220 is provided above the inner cylinder 110.
The second positioning mechanism 220 includes a second ball seat 222, and the second ball seat 222 is provided with a through hole with a diameter gradually reduced from top to bottom;
the second positioning mechanism 220 is configured to release the position-restricting relationship between the second positioning mechanism 220 and the outer cylinder 210 by cutting the second stopper pin 221 by an impact of the second ball 223 when the second ball 223 is dropped into the second ball seat 222. After the second ball 223 is dropped, the outer cylinder 210 moves downward, the releasing hole drill 240 drills downward to form a releasing hole, the stress of the rock body between the outer cylinder 210 and the inner cylinder 110 is released, and at this time, the position data in the measuring hole is measured again, so that the stress value before the stress release can be obtained according to the position data before and after the stress release.
In an alternative to this embodiment, it is preferable that,
the upper part of the outer cylinder 210 is connected with a drill rod joint 230, the outer wall of the outer cylinder 210 is provided with a stepped structure, and the lower end of the drill rod joint 230 is connected with the stepped structure;
the lower portion of the outer cylinder 210 is further provided with a relief hole drill 240.
Example two
The embodiment provides a method for measuring the geostress by a deep oil and gas reservoir stress relieving method, which comprises the following steps:
s1: the survey drilling mechanism 100 drills down to form a survey hole, and a survey module 120 of the drilling mechanism surveys first position data of the survey hole;
s2: the release drilling mechanism 200 drills down to form a release hole to release the stress of the formation between the gauge hole and the release hole, and the gauge module 120 measures second position data of the gauge hole after the stress is released.
More specifically, step S1 includes:
s11, a first ball 143 is dropped into the first ball seat 142, the first limit pin 141 connecting the inner cylinder 110 and the first ball seat 142 is cut off, thereby releasing the limit relation between the first ball seat 142 and the inner cylinder 110, the first ball seat 142 drives the measuring module 120 to move downwards, so that the measuring contact pin 121 of the measuring module 120 is changed from a retraction state to a measuring state, and the measuring contact pin 121 measures first position data of a measuring hole; referring to fig. 10, fig. 10 is a schematic view illustrating a drilling state, when the first ball 143 is dropped into the first ball seat 142, the first limit pin 141 is cut off, the first ball seat 142 drives the measuring module 120 to move down to a position away from the limit stop, and the measuring stylus 121 is ejected.
More specifically, step S2 includes:
and S22, putting a second ball 223 into the second ball seat 222, cutting off a second limit pin 221 connecting the outer cylinder 210 and the second ball seat 222, thereby releasing the limit relation between the second ball seat 222 and the outer cylinder 210, drilling the second ball seat 222 downwards to form a release hole, releasing the stress of the rock mass between the release hole and the measuring hole, and measuring the second position data of the measuring hole after the stress is released by the measuring module 120. Referring to fig. 11, fig. 11 is a schematic view showing a measuring state in which the second ball 223 is dropped into the second ball seat 222, the second stopper pin 221 is cut, the outer cylinder 210 moves downward, the release drill positioned at the lower portion of the outer cylinder 210 drills downward to form a release hole, and the rock stress between the release hole and the measuring hole is released.
EXAMPLE III
The embodiment provides a method for solving the geostress by deep hydrocarbon reservoir stress relieving method, which is described as follows:
assuming the test borehole is a circular hole, the shape of the circular hole is stressed in two dimensions (σ) 1 ，σ 2 ) And hydrostatic pressure (p) 1 ) Is deformed. Assume that a point P on the borehole wall is deformed to P' (x, y), as shown in FIG. 7.
Referring to FIG. 13, the radial displacement (u) and tangential displacement (v) of a point P on the hole wall can be expressed as
E the modulus of elasticity of the rock; poisson's ratio of μ rock; alpha is the radius of the test borehole; theta is an included angle between the straight line OP and the X axis;
by equation transformation, we get P' (x, y):
order:
substituting equation (3) into equation (2) yields the following equation:
equation (4) is a standard ellipse equation. The geometric shape of the round hole after deformation under the action of two-dimensional plane stress and hydrostatic pressure is an ellipse, so that the size of the ground stress can be calculated by obtaining the shape characteristics of the cross section of a drill hole and the rock mechanical parameters at a measuring point in situ in an underground reservoir according to a ground stress measuring device, after the round hole is deformed into an ellipse by stress, the direction of the long axis and the short axis of the ellipse is superposed with the main stress direction around the round hole, and the direction of the ground stress is determined according to the reverse information obtained by a digital compass.
While the invention has been described with reference to a preferred embodiment, various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention, and particularly, features shown in the various embodiments may be combined in any suitable manner without departing from the scope of the invention. It is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, which indicate a directional or positional relationship, are based on the directional or positional relationship as shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The terms "comprises," "comprising," or any other similar term are intended to cover a non-exclusive inclusion, such that a process, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, article, or apparatus.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (5)
1. A deep oil and gas reservoir stress relieving method crustal stress measuring device which characterized in that:
the method comprises the following steps: a survey drilling mechanism (100) and a release drilling mechanism (200);
the measuring drilling mechanism (100) is provided with an inner cylinder (110) and a measuring module (120) connected to the inner cylinder (110), the inner cylinder (110) is configured to be capable of drilling downwards to form a measuring hole, the measuring module (120) is driven by the inner cylinder (110) to move to a target point of the measuring hole, the measuring module (120) comprises a measuring contact pin (121), and a contact (1212) of the measuring contact pin (121) faces outwards and can stretch and retract transversely to measure aperture data of the target point;
the drill releasing mechanism (200) comprises an outer cylinder (210), the outer cylinder (210) is covered on the inner cylinder (110), the outer cylinder (210) is configured to be capable of drilling downwards to form a releasing hole, and a stress-released rock body is arranged between the releasing hole and the measuring hole;
the measuring drilling mechanism (100) further comprises a first positioning mechanism (140), the first positioning mechanism (140) is positioned in the inner cylinder (110) through a first limiting pin (141) inserted in the side wall of the inner cylinder (110), and the first positioning mechanism (140) is arranged above the measuring module (120);
the first positioning mechanism (140) comprises a first ball seat (142), and the first ball seat (142) is provided with a through hole with a diameter gradually reduced from top to bottom;
the first positioning mechanism (140) is configured to release the first positioning mechanism (140) from the inner cylinder (110) by cutting the first stopper pin (141) under the impact of the first ball (143) when the first ball (143) is dropped into the first ball seat (142);
the drill releasing mechanism (200) is provided with a second positioning mechanism (220), the second positioning mechanism (220) is positioned in the outer cylinder (210) through a second limit pin (221) inserted in the inner wall of the outer cylinder (210), and the second positioning mechanism (220) is arranged above the inner cylinder (110);
the second positioning mechanism (220) comprises a second ball seat (222), and the second ball seat (222) is provided with a through hole with the diameter gradually reduced from top to bottom;
the second positioning mechanism (220) is configured to release the position-limiting relationship between the second positioning mechanism (220) and the outer cylinder (210) by cutting the second limiting pin (221) under the impact of the second ball (223) when the second ball (223) is dropped into the second ball seat (222);
the method for measuring the crustal stress by the deep oil and gas reservoir stress relief method comprises the following steps:
s1: the measuring drilling mechanism (100) drills downwards to form a measuring hole, and a measuring module (120) of the drilling mechanism measures position data of the measuring hole;
s2: the releasing drilling mechanism (200) drills downwards to form a releasing hole so as to release the stress of the rock stratum between the measuring hole and the releasing hole, and the measuring module (120) measures the position data of the measuring hole after the stress is released;
also comprises the following steps:
a first ball body (143) is thrown into a first ball seat (142), a first limit pin (141) connecting the inner cylinder (110) and the first ball seat (142) is cut off, so that the limit relation between the first ball seat (142) and the inner cylinder (110) is released, the first ball seat (142) drives the measuring module (120) to move downwards, a measuring contact pin (121) of the measuring module (120) is changed from a retraction state to a measuring state, and the measuring contact pin (121) measures first position data of a measuring hole;
a second ball (223) is dropped into a second ball seat (222), a second stopper pin (221) connecting the outer cylinder (210) and the second ball seat (222) is cut off, so that the stopper relation between the second ball seat (222) and the outer cylinder (210) is released, the second ball seat (222) is drilled downward to form a release hole, the stress of the rock body between the release hole and the measuring hole is released, and the measuring module (120) measures second position data of the measuring hole after the stress is released.
2. The deep hydrocarbon reservoir stress relieving crustal stress measuring device of claim 1, wherein:
the measuring stylus (121) comprises an elastic expansion (1211) and a contact (1212), the measuring stylus (121) having a measuring state and a retracted state;
in a retraction state, the contact (1212) retracts under the blocking action of a sliding sleeve grid block (130) arranged outside the inner cylinder (110), and the elastic telescopic part (1211) retracts to store energy;
in a measuring state, the measuring contact pin (121) moves downwards to the contact head (1212) to be far away from the sliding sleeve stop (130) so as to release the blocking effect of the sliding sleeve stop (130), and the contact head (1212) extends out under the elastic force of the elastic telescopic part (1211).
3. The deep hydrocarbon reservoir stress relieving crustal stress measuring device of claim 2, wherein:
the measurement module (120) further comprises a main body (122), the main body (122) is arranged to be of an annular structure, a plurality of through telescopic holes are distributed in the main body (122) along the radial direction in an annular array mode, the measurement contact pins (121) are arranged in the telescopic holes, and the contacts (1212) of the measurement contact pins (121) face outwards.
4. The deep hydrocarbon reservoir stress relieving crustal stress measuring device of claim 3, wherein:
and a digital compass (150), a data memory (160) and a measuring hole drill bit (170) are sequentially arranged below the measuring module (120).
5. The deep hydrocarbon reservoir stress relieving crustal stress measuring device of claim 4, wherein:
the upper part of the outer barrel (210) is connected with a drill rod joint (230), the outer wall of the outer barrel (210) is provided with a stepped structure, and the lower end of the drill rod joint (230) is connected with the stepped structure;
the lower part of the outer cylinder (210) is also provided with a releasing hole drill (240).
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