CN114764844A - Shale gas drilling optimization design method and device - Google Patents
Shale gas drilling optimization design method and device Download PDFInfo
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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- E21B—EARTH DRILLING, e.g. DEEP 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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Abstract
The invention discloses a shale gas drilling optimization design method and a shale gas drilling optimization design device, wherein the method comprises the following steps: acquiring geophysical seismic data, seismic interpretation data and target reservoir data of a target well region, wherein the seismic interpretation data comprise: seismic interpretation horizon data and seismic interpretation fault data; establishing a three-dimensional structure model according to the geophysical seismic data, seismic interpretation data and target reservoir data of a target well region; determining formation vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the formation vertical depth change data; determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data; and carrying out landing guidance of the target point A and optimization of the horizontal section track according to the three-dimensional construction model and the characteristic data of the reference well. The invention can improve the shale gas drilling speed, improve the operability and reduce the error and the cost.
Description
Technical Field
The invention relates to the technical field of drilling, in particular to an optimal design method and device for shale gas drilling.
Background
Shale gas is used as unconventional clean energy and becomes an exploration and development hotspot due to the abundant resource amount and the successful benefit large-scale development of the United states. However, shale gas reservoir development has an obvious 'treadmill' effect, large-area, large-scale and continuous drilling is needed, and the yield is reduced as long as drilling is stopped. From 2018, shale gas exploration drilling wells and completed drilling wells in Chongqing areas of China Petroleum are greatly increased, a large number of civil teams and new teams are added into shale gas exploration big meet war, the drilling workload is sharply increased, the single-machine operation capacity is urgently required to be enhanced, the drilling speed is improved, and the drilling period is shortened. But the drilling comprehensive efficiency of shale gas horizontal wells is not high, the well building period of different platforms greatly fluctuates due to different well team management, different geological working conditions and different technical personnel operation levels, and the learning curve is not obvious. Along with the lengthening of the horizontal section of the horizontal well, the vertical depth of the horizontal well is increased, the requirement on the drilling rate of high-quality shale is higher, the requirement on the drilling quality is improved, and the complex engineering technical problems such as leakage, drill sticking and the like caused by the comprehensive factors such as high geological uncertainty risk and the like are still outstanding.
The existing shale gas drilling speed-up method has the problems of poor operability, large error and high cost. Therefore, there is a need for an optimized shale gas drilling design that overcomes the above problems.
Disclosure of Invention
The embodiment of the invention provides an optimal design method for shale gas drilling, which is used for improving the shale gas drilling speed, improving the operability and reducing the error and the cost and comprises the following steps:
acquiring geophysical seismic data, seismic interpretation data and target reservoir data of a target well region, wherein the seismic interpretation data comprise: seismic interpretation horizon data and seismic interpretation fault data;
establishing a three-dimensional structure model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region;
determining formation vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the formation vertical depth change data;
determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data;
and carrying out landing guidance and horizontal segment trajectory optimization of the target point A according to the three-dimensional construction model and the reference well characteristic data.
The embodiment of the invention provides a shale gas drilling optimization design device, which is used for improving the shale gas drilling speed, improving the operability and reducing the error and the cost, and comprises the following components:
the data acquisition module is used for acquiring geophysical seismic data, seismic interpretation data and target reservoir data of a target well region, wherein the seismic interpretation data comprise: seismic interpretation horizon data and seismic interpretation fault data;
the model building module is used for building a three-dimensional structural model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region;
the first optimization module is used for determining stratum vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory and optimizing the borehole trajectory according to the stratum vertical depth change data;
the second optimization module is used for determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data;
and the third optimization module is used for carrying out landing guidance of the target point A and optimization of the horizontal section track according to the three-dimensional construction model and the characteristic data of the reference well.
The embodiment of the invention also provides computer equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the computer program to realize the shale gas drilling optimization design method.
The embodiment of the invention also provides a computer-readable storage medium, which stores a computer program for executing the shale gas drilling optimization design method.
The embodiment of the invention obtains geophysical seismic data, seismic interpretation data and target reservoir data of a target well region, wherein the seismic interpretation data comprise: seismic interpretation horizon data and seismic interpretation fault data; establishing a three-dimensional structure model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region; determining formation vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the formation vertical depth change data; determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data; and carrying out landing guidance of the target point A and optimization of the horizontal section track according to the three-dimensional construction model and the reference well characteristic data. According to the embodiment of the invention, a three-dimensional structure model is established according to geophysical seismic data, seismic interpretation data and target reservoir data of a target well area, so that formation vertical depth change data are determined according to the three-dimensional structure model and a preset well track, the well track is further optimized to ensure accurate window entry, then formation apparent dip angle data are determined according to the three-dimensional structure model and the optimized well track, drilling tool combination types are optimized according to the formation apparent dip angle data, drilling tool combination is reasonably matched, sliding drilling is reduced, and finally, landing guidance and horizontal section track optimization of an A target point are performed according to the three-dimensional structure model and reference well characteristic data, so that fixed point guidance is converted into trend guidance, the shale gas drilling speed is increased, the operability is improved, and errors and the cost are reduced.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:
FIG. 1 is a schematic diagram of an optimized design method for shale gas drilling in an embodiment of the invention;
FIG. 2 is a schematic illustration of target reservoir data and geophysical seismic data in an embodiment of the invention;
FIG. 3 is a schematic diagram of a three-dimensional construction model according to an embodiment of the present invention;
FIG. 4 is a structural diagram of an optimal design device for shale gas drilling in the embodiment of the invention;
fig. 5 is a schematic structural diagram of a computer device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
As mentioned above, the existing shale gas drilling speed-up method has the problems of poor operability, large error and high cost. At present, the patent for shale gas drilling acceleration mainly focuses on equipment and tools, and the tool application is limited by underground safety and is difficult to popularize. In addition, due to the low initial geological recognition degree, the well drilling design is often poor in operability and large in error, and updating according to the vertical depth change of the adjacent well stratum is difficult to achieve.
In order to improve the shale gas drilling speed, improve the operability and reduce the error and the cost, the embodiment of the invention provides an optimal design method for shale gas drilling, as shown in fig. 1, the method may include:
102, establishing a three-dimensional structure model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region;
103, determining formation vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the formation vertical depth change data;
104, determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data;
and 105, carrying out A target landing guidance and horizontal segment trajectory optimization according to the three-dimensional construction model and the reference well characteristic data.
As shown in fig. 1, in the embodiment of the present invention, geophysical seismic data, seismic interpretation data and target reservoir data of a target well are obtained, where the seismic interpretation data include: seismic interpretation horizon data and seismic interpretation fault data; establishing a three-dimensional structure model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region; determining stratum vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the stratum vertical depth change data; determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data; and carrying out landing guidance and horizontal segment trajectory optimization of the target point A according to the three-dimensional construction model and the reference well characteristic data. According to the embodiment of the invention, a three-dimensional structure model is established according to geophysical seismic data, seismic interpretation data and target reservoir data of a target well area, so that stratum vertical depth change data are determined according to the three-dimensional structure model and a preset well track, further, the well track is optimized to ensure accurate window entry, then, stratum apparent dip angle data are determined according to the three-dimensional structure model and the optimized well track, drilling tool combination types are optimized according to the stratum apparent dip angle data, drilling tool combinations are reasonably matched, sliding drilling is reduced, finally, target point A landing guidance and horizontal section track optimization are performed according to the three-dimensional structure model and reference well characteristic data, fixed point guidance is converted into trend guidance, the shale gas drilling speed is increased, operability is improved, and errors and cost are reduced.
In specific implementation, geophysical seismic data, seismic interpretation data and target reservoir data of a target well region are obtained, wherein the seismic interpretation data comprise: seismic interpretation horizon data and seismic interpretation fault data.
In an embodiment, as shown in fig. 2, the target reservoir profile includes: well drilling data, well logging data and oil testing data; the geophysical seismic data includes: a depth domain data volume, a time domain data volume and a time-depth conversion model. Wherein the well data in the target reservoir data may include: well head coordinates, well bore trajectory, geological stratification data.
In specific implementation, a three-dimensional structural model is established according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region.
In an embodiment, building a three-dimensional structural model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region includes: establishing a target reservoir stratum model according to the geophysical seismic data, the seismic interpretation stratum data and the target reservoir stratum data of the target well region; establishing a target reservoir fault model according to the geophysical seismic data, the seismic interpretation fault data and the target reservoir data of the target well region; and establishing a three-dimensional structure model according to the target reservoir horizon model and the target reservoir fault model.
In the embodiment, according to drilling conditions of all small layers of a reservoir in actual drilling geological stratification and oil testing geological design, seismic interpretation horizon data are corrected, stratum comparison is carried out, and model precision is improved.
In the embodiment, for the fault which is actually drilled and encountered but is not interpreted by the earthquake, the seismic data is re-finely processed and the fault is interpreted, and a new interpretation result is added into the three-dimensional model.
In the embodiment, according to the geophysical seismic data, seismic interpretation data and target reservoir data of a target well region, a three-dimensional structure model combining well and seismic is built by using the thickness of a single well, as shown in fig. 3, and iterative research is continuously carried out on the model, so that the reliability of the model is improved.
In the embodiment, a target reservoir fault model is established by combining a geophysical interpretation fault and a real drilling and encountering fault; correcting the geophysical interpretation horizon through actual geological stratification of a real drilling well on the basis of the geophysical interpretation horizon, and establishing a target reservoir horizon model; and establishing a three-dimensional structure model combining well and seismic by using the thickness of a single well through the target reservoir fault model and the target reservoir horizon model.
During specific implementation, determining formation vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the formation vertical depth change data.
In an embodiment, determining formation vertical depth change data according to the three-dimensional construction model and a preset wellbore trajectory, and optimizing the wellbore trajectory according to the formation vertical depth change data includes: establishing a single well profile according to the three-dimensional construction model and a preset well track; determining formation vertical depth change data according to the single well profile; and optimizing the well track according to the formation vertical depth change data.
In this embodiment, a single well profile is established according to the three-dimensional structural model and a preset wellbore trajectory, and then, the formation vertical depth change data of a key layer can be determined according to the single well profile, wherein the key layer refers to a formation with good or poor drillability, a formation which is easy to leak and break, and the like. Specifically, for a stratum with a large deposition thickness, the heterogeneity of the upper part, the middle part and the lower part of the stratum are strong, the drillability is different, and the vertical depth change of a key layer position is subject to the boundary standard of complexity or drillability easily generated in the drilling process.
And then, according to the formation vertical depth change data, optimizing the borehole trajectory, specifically, according to the formation vertical depth change and the geology and engineering attributes of each layer, carrying out borehole trajectory optimization, wherein the principle of borehole trajectory optimization comprises the following steps: designing an azimuth angle according to a horizontal section in the drilling design, and reasonably optimizing a sliding drilling well section on the premise of considering a rotary guide limiting area, reducing dog-leg degree and realizing a geological target; easily leaked and easily broken stratum and stratum with poor drillability, sliding drilling is avoided, and a steady and inclined composite drilling mode is adopted for quick passing; in the stratum with good drillability, well deviation azimuth adjustment is carried out, and the track design of the borehole to be drilled is carried out according to each measuring point in the actual drilling, so that the track is controllable, the dog-leg degree is reduced to the maximum extent, and the difficulty is reduced for the construction operations of later-stage well dredging, electrical measurement, casing running and the like. Specifically, the rotary guiding tool keeps the stability of the tool face by means of the rotating speed of the servo motor and the rotating speed of the drilling tool, a magnetometer for measuring the rotating speed of the drilling tool is influenced by magnetic lines of force, when a borehole to be drilled is parallel to the magnetic lines of force of the earth, the magnetometer cannot measure the rotating speed of the drilling tool under the magnetic saturation condition, and a rotary guiding system cannot control the tool face, so that the track control effect is lost. The dog leg count should be as low as 6.5 °/30 m.
During specific implementation, determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data.
In an embodiment, optimizing a drill tool assembly type based on the formation apparent dip angle data includes: determining a natural increasing and decreasing trend rule of well deviation during drilling according to the stratum apparent dip angle data; according to the natural trend law of increasing and decreasing of well deviation during drilling, the type of the drilling tool assembly is optimized, and the type of the drilling tool assembly comprises the following components: a centralizer position type and a centralizer outer diameter type.
In the embodiment, a natural increasing and decreasing trend rule of the well deviation during drilling is determined according to the formation apparent dip angle data, specifically, the advancing direction of the drill bit always deflects towards the direction vertical to the formation layer, namely, the formation has a tendency of inclining upwards and deviating towards the formation.
In the embodiment, the positions and the outer diameters of the two centralizers are adjusted when the drilling tool is combined, so that the effect that the natural inclination increasing and inclination reducing rule is consistent with the optimized track is achieved, the sliding drilling time is shortened, and the drilling time effectiveness and speed are improved. Specifically, in a 215.9mm well section, if the optimized track needs to be declined, the distance between two centralizers can be shortened, and the centralizer at the rear part of the screw rod adopts a larger outer diameter; if the optimized track needs to be increased in inclination, one or more short drill collars can be added between the two centralizers, the external diameter of the screw rod rear centralizer is smaller than that of the screw rod centralizer, and the external diameter of the screw rod rear centralizer is smaller than that of the screw rod centralizer.
And during specific implementation, carrying out A target landing guidance and horizontal segment trajectory optimization according to the three-dimensional construction model and the reference well characteristic data.
In an embodiment, the landing guidance and horizontal segment trajectory optimization of the target point a according to the three-dimensional construction model and the reference well characteristic data comprises: according to the three-dimensional construction model and the reference well characteristic data, a successive approximation method is adopted for comparing the marker layers in the landing process, and the reference well characteristic data comprises: referring to lithology characteristic data, relative thickness characteristic data, vertical depth characteristic data and natural gamma characteristic data of a well; according to the comparison result, determining the vertical depth data of the target point A; carrying out landing guidance on the target point A according to the target point A vertical depth data; judging the track position and the track trend according to the three-dimensional construction model; and optimizing the horizontal section track according to the track position and the track trend.
In the embodiment, the sag depth of the target point A is predicted according to the three-dimensional model, when the distance to the predicted target point A is 50m, a successive approximation method is adopted, the lithologic characteristic data, the relative thickness characteristic data, the sag depth characteristic data and the natural gamma characteristic data of an adjacent well and a marked well are taken as the basis, the marked layer comparison in the landing process is carried out, the natural gamma rising at the top of the Longmaxi group and the natural gamma high tip of the No. 3 small layer are taken as the marked layers, the sag depth of the target point A is determined, the dip angle of the stratum is determined according to the three-dimensional model, the well inclination angle and the increasing slope of the upper stratum are controlled, and the track enters the target in the optimal posture. And (3) drilling at a specific position according to geological requirements by actual drilling guidance, judging the track position according to the three-dimensional model when natural gamma changes while drilling, predicting the track trend according to the current well deviation, and if a micro-amplitude structure is met, and the well track can return to the geological required position in 1-2 stand columns, not adjusting the well deviation and ensuring the track to be smooth.
In the embodiment, after the optimization of the track before drilling and the drilling tool combination of one well is completed, the in-drill model is updated in real time, the track to be drilled is optimized, the landing guidance and the horizontal section track are adjusted, data such as actual drilling well drilling, well logging and the like are input into the three-dimensional structural model, model iteration research and the guidance work before drilling of a lower well are carried out, and a closed-loop design and research method is formed.
The shale gas drilling optimization design method provided by the invention can accurately predict the vertical depth change and the dip angle of the stratum, reasonably optimize the borehole track and the drilling tool assembly, ensure the accurate target entry and smooth track, and has very important significance for improving the overall aging and speed of shale gas drilling.
Based on the same inventive concept, the embodiment of the invention also provides an optimal design device for shale gas drilling, which is described in the following embodiment. Because the principles for solving the problems are similar to the shale gas drilling optimization design method, the implementation of the device can refer to the implementation of the method, and repeated parts are not described again.
Fig. 4 is a structural diagram of an optimal design device for shale gas drilling in an embodiment of the present invention, and as shown in fig. 4, the device includes:
a data obtaining module 401, configured to obtain geophysical seismic data of a target well region, seismic interpretation data, and target reservoir data, where the seismic interpretation data include: seismic interpretation horizon data and seismic interpretation fault data;
a model building module 402, configured to build a three-dimensional structural model according to the geophysical seismic data, seismic interpretation data, and target reservoir data of the target well region;
a first optimization module 403, configured to determine formation vertical depth change data according to the three-dimensional structural model and a preset wellbore trajectory, and optimize the wellbore trajectory according to the formation vertical depth change data;
a second optimization module 404, configured to determine formation apparent dip angle data according to the three-dimensional structural model and the optimized borehole trajectory, and optimize the type of the drilling tool assembly according to the formation apparent dip angle data;
and a third optimization module 405, configured to perform a target landing guidance and a horizontal segment trajectory optimization according to the three-dimensional structural model and the reference well characteristic data.
In one embodiment, the target reservoir profile includes: well drilling data, well logging data and oil testing data;
the geophysical seismic data includes: a depth domain data volume, a time domain data volume and a time-depth conversion model.
In one embodiment, the model building module 402 is further configured to:
establishing a target reservoir layer model according to the geophysical seismic data of the target well region, seismic interpretation layer data and target reservoir layer data;
establishing a target reservoir fault model according to the geophysical seismic data, the seismic interpretation fault data and the target reservoir data of the target well region;
and establishing a three-dimensional construction model according to the target reservoir layer position model and the target reservoir fault model.
In one embodiment, the first optimization module 403 is further configured to:
establishing a single well profile according to the three-dimensional construction model and a preset well track;
determining formation vertical depth change data according to the single well profile;
and optimizing the well track according to the formation vertical depth change data.
In one embodiment, the second optimization module 404 is further configured to:
determining a natural increasing and decreasing trend rule of well deviation during drilling according to the stratum apparent dip angle data;
according to the natural trend law of increasing and decreasing of well deviation during drilling, the type of the drilling tool assembly is optimized, and the type of the drilling tool assembly comprises the following components: a centralizer position type and a centralizer outer diameter type.
In one embodiment, the third optimization module 405 is further configured to:
according to the three-dimensional construction model and the reference well characteristic data, a successive approximation method is adopted for comparing the marker layers in the landing process, and the reference well characteristic data comprises: referring to lithology characteristic data, relative thickness characteristic data, vertical depth characteristic data and natural gamma characteristic data of a well;
according to the comparison result, determining the vertical depth data of the target point A;
carrying out landing guidance on the target point A according to the vertical depth data of the target point A;
judging the track position and the track trend according to the three-dimensional construction model;
and optimizing the horizontal section track according to the track position and the track trend.
In summary, in the embodiments of the present invention, geophysical seismic data, seismic interpretation data, and target reservoir data of a target well are obtained, where the seismic interpretation data include: seismic interpretation horizon data and seismic interpretation fault data; establishing a three-dimensional structure model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region; determining formation vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the formation vertical depth change data; determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data; and carrying out landing guidance and horizontal segment trajectory optimization of the target point A according to the three-dimensional construction model and the reference well characteristic data. According to the embodiment of the invention, a three-dimensional structure model is established according to geophysical seismic data, seismic interpretation data and target reservoir data of a target well area, so that formation vertical depth change data are determined according to the three-dimensional structure model and a preset well track, the well track is further optimized to ensure accurate window entry, then formation apparent dip angle data are determined according to the three-dimensional structure model and the optimized well track, drilling tool combination types are optimized according to the formation apparent dip angle data, drilling tool combination is reasonably matched, sliding drilling is reduced, and finally, landing guidance and horizontal section track optimization of an A target point are performed according to the three-dimensional structure model and reference well characteristic data, so that fixed point guidance is converted into trend guidance, the shale gas drilling speed is increased, the operability is improved, and errors and the cost are reduced.
Based on the aforementioned inventive concept, as shown in fig. 5, the present invention further provides a computer device 500, which includes a memory 510, a processor 520, and a computer program 530 stored on the memory 510 and executable on the processor 520, wherein the processor 520 executes the computer program 530 to implement the aforementioned shale gas drilling optimization design method.
Based on the foregoing inventive concept, the present invention provides a computer-readable storage medium storing a computer program, which when executed by a processor implements the shale gas drilling optimization design method.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (14)
1. The shale gas drilling optimization design method is characterized by comprising the following steps:
obtaining geophysical seismic data, seismic interpretation data and target reservoir data for a target well zone, the seismic interpretation data comprising: seismic interpretation horizon data and seismic interpretation fault data;
establishing a three-dimensional structure model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region;
determining formation vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the formation vertical depth change data;
determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data;
and carrying out landing guidance and horizontal segment trajectory optimization of the target point A according to the three-dimensional construction model and the reference well characteristic data.
2. The shale gas drilling optimization design method of claim 1, wherein the target reservoir data comprises: well drilling data, well logging data and oil testing data;
the geophysical seismic data includes: a depth domain data volume, a time domain data volume and a time-depth conversion model.
3. The shale gas drilling optimization design method of claim 1, wherein building a three-dimensional formation model based on geophysical seismic data, seismic interpretation data and target reservoir data for the target well zone comprises:
establishing a target reservoir stratum model according to the geophysical seismic data, the seismic interpretation stratum data and the target reservoir stratum data of the target well region;
establishing a target reservoir fault model according to the geophysical seismic data, the seismic interpretation fault data and the target reservoir data of the target well region;
and establishing a three-dimensional structure model according to the target reservoir horizon model and the target reservoir fault model.
4. The shale gas drilling optimization design method of claim 1, wherein determining formation vertical depth change data according to the three-dimensional construction model and a preset wellbore trajectory, and optimizing the wellbore trajectory according to the formation vertical depth change data comprises:
establishing a single well profile according to the three-dimensional construction model and a preset well track;
determining formation vertical depth change data according to the single well profile;
and optimizing the well track according to the formation vertical depth change data.
5. The shale gas drilling optimization design method of claim 1, wherein optimizing a drilling tool assembly type based on the formation apparent dip angle data comprises:
determining a natural increasing and decreasing trend rule of well deviation during drilling according to the stratum apparent dip angle data;
according to the natural trend rule of increasing and decreasing well deviation during drilling, the type of the drilling tool assembly is optimized, and the type of the drilling tool assembly comprises the following components: a centralizer position type and a centralizer outer diameter type.
6. The shale gas drilling optimization design method of claim 1, wherein performing a target landing guidance and horizontal segment trajectory optimization according to the three-dimensional formation model and reference well characteristic data comprises:
according to the three-dimensional construction model and the reference well characteristic data, a successive approximation method is adopted for comparing the marker layers in the landing process, and the reference well characteristic data comprises: referring to lithology characteristic data, relative thickness characteristic data, vertical depth characteristic data and natural gamma characteristic data of a well;
according to the comparison result, determining the vertical depth data of the target point A;
carrying out landing guidance on the target point A according to the vertical depth data of the target point A;
judging the track position and the track trend according to the three-dimensional construction model;
and optimizing the horizontal section track according to the track position and the track trend.
7. The utility model provides a shale gas drilling optimal design device which characterized in that includes:
the data acquisition module is used for acquiring geophysical seismic data, seismic interpretation data and target reservoir data of a target well region, wherein the seismic interpretation data comprise: seismic interpretation horizon data and seismic interpretation fault data;
the model building module is used for building a three-dimensional structural model according to the geophysical seismic data, the seismic interpretation data and the target reservoir data of the target well region;
the first optimization module is used for determining formation vertical depth change data according to the three-dimensional construction model and a preset borehole trajectory, and optimizing the borehole trajectory according to the formation vertical depth change data;
the second optimization module is used for determining formation apparent dip angle data according to the three-dimensional construction model and the optimized borehole trajectory, and optimizing the type of the drilling tool assembly according to the formation apparent dip angle data;
and the third optimization module is used for carrying out A target landing guidance and horizontal segment track optimization according to the three-dimensional construction model and the reference well characteristic data.
8. The shale gas drilling optimization design apparatus of claim 7, wherein the target reservoir data comprises: well drilling data, well logging data and oil testing data;
the geophysical seismic data includes: a depth domain data volume, a time domain data volume and a time-depth conversion model.
9. The shale gas drilling optimization design apparatus of claim 7, wherein the model building module is further to:
establishing a target reservoir stratum model according to the geophysical seismic data, the seismic interpretation stratum data and the target reservoir stratum data of the target well region;
establishing a target reservoir fault model according to the geophysical seismic data, the seismic interpretation fault data and the target reservoir data of the target well region;
and establishing a three-dimensional construction model according to the target reservoir layer position model and the target reservoir fault model.
10. The shale gas drilling optimization design apparatus of claim 7, wherein the first optimization module is further to:
establishing a single well profile according to the three-dimensional construction model and a preset well track;
determining formation vertical depth change data according to the single well profile;
and optimizing the well track according to the formation vertical depth change data.
11. The shale gas drilling optimization design apparatus of claim 7, wherein the second optimization module is further to:
determining a natural increasing and decreasing trend rule of well deviation during drilling according to the stratum apparent dip angle data;
according to the natural trend law of increasing and decreasing of well deviation during drilling, the type of the drilling tool assembly is optimized, and the type of the drilling tool assembly comprises the following components: a centralizer position type and a centralizer outer diameter type.
12. The shale gas drilling optimization design apparatus of claim 7, wherein the third optimization module is further to:
according to the three-dimensional construction model and the reference well characteristic data, a successive approximation method is adopted for comparing the marker layers in the landing process, and the reference well characteristic data comprises: referring to lithology characteristic data, relative thickness characteristic data, vertical depth characteristic data and natural gamma characteristic data of a well;
according to the comparison result, determining the vertical depth data of the target point A;
carrying out landing guidance on the target point A according to the target point A vertical depth data;
judging the track position and the track trend according to the three-dimensional construction model;
and optimizing the horizontal section track according to the track position and the track trend.
13. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of any one of claims 1 to 6 when executing the computer program.
14. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program for executing the method of any one of claims 1 to 6.
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