CN114607356A - Drilling stuck layer analysis method, device, medium and equipment - Google Patents
Drilling stuck layer analysis method, device, medium and equipment Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 96
- 238000004458 analytical method Methods 0.000 title claims abstract description 24
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 61
- 239000011707 mineral Substances 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims abstract description 46
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- 238000010586 diagram Methods 0.000 description 11
- 230000008021 deposition Effects 0.000 description 9
- 239000011435 rock Substances 0.000 description 6
- 229910001748 carbonate mineral Inorganic materials 0.000 description 3
- 239000002734 clay mineral Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 3
- 239000010433 feldspar Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
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- 101100271175 Oryza sativa subsp. japonica AT10 gene Proteins 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
- E21B47/00—Survey of boreholes or wells
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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
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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Abstract
The invention relates to a drilling well stuck layer analysis method, a device, a medium and equipment, which comprise the following steps: analyzing the change rule of the actually drilled mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilled well to be drilled around the drilled well, and expressing the change rule by using a variation function; performing pre-drilling prediction on a mineral combination attribute fingerprint map and a logging attribute fingerprint map to be drilled based on the variation function and by using the spatial continuity characteristics of seismic data to obtain a predicted fingerprint map to be drilled; in the drilling process, the actual drilling mineral combination attribute fingerprint map and the logging attribute fingerprint map of the completed well are used for correcting the predicted fingerprint map of the well, and the corrected predicted fingerprint map is used for adjusting and predicting the mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilling interval in the next step. The method of the invention enables the reflection of the underground information to be more comprehensive and deep, thereby improving the prediction and layer blocking precision of the key layer.
Description
Technical Field
The invention relates to a drilling stuck layer analysis method, a drilling stuck layer analysis device, a drilling stuck layer analysis medium and drilling stuck layer analysis equipment, and belongs to the technical field of stratum lithology analysis.
Background
In the traditional well drilling field stratum clamping method, the rock debris fished in the well drilling process is used as the basis for judging the lithological combination, and meanwhile, the stratum clamping is carried out by taking the characteristic change of a logging-while-drilling curve as an auxiliary. The while-drilling blocking layer is a work key point and a difficulty point in the logging process, and is characterized in that on the basis of deeply knowing regional data, geological design and adjacent well data, the stratum dividing principle and the stratum superposition sequence of a well region are fully mastered, and the while-drilling information in the drilling process is fully utilized for comparative analysis, so that reasonable judgment is made and the purpose of accurately blocking the layer is achieved. In the drilling process, available drilling information comprises lithology combination, well logging curves and the like, the accuracy of the bed clamping is very close to the degree of grasp of field bed clamping personnel on the lithology combination characteristics of the regional stratum and the layering experience, strong anthropography is shown, and meanwhile certain hysteresis is often caused.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method, a device, a medium and equipment for analyzing a stuck layer of a drilling well, wherein the method fully utilizes the characteristic of the inherent mineral combination (feldspar, quartz, clay minerals and carbonate minerals) and the characteristic attribute fingerprint map of logging (gamma, sound wave, density and various apparent resistivity curves) which cause the change of lithological combination to accurately predict the stuck layer, and aims to fully utilize the difference of the attribute fingerprint maps of cuttings in the process of drilling and logging data between different stratums to carry out the stuck layer while drilling.
In order to achieve the purpose, the invention adopts the following technical scheme:
a well drilling stuck layer analysis method based on mineral combination and logging attribute fingerprint maps comprises the following steps:
analyzing the change rule of the actually drilled mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilled well to be drilled around the drilled well, and expressing the change rule by using a variation function;
performing pre-drilling prediction on a mineral combination attribute fingerprint map and a logging attribute fingerprint map to be drilled based on the variation function and by using the spatial continuity characteristics of seismic data to obtain a predicted fingerprint map to be drilled;
in the drilling process, the predicted fingerprint map of the drilling well is corrected by using the actual drilling mineral combination attribute fingerprint map and the logging attribute fingerprint map of the completed drilling well (the predicted fingerprint map of the drilling well and the predicted fingerprint map of the drilling well are the same fingerprint map, only the time is different, the drilling well is not drilled, and the drilling well is drilled), and the corrected predicted fingerprint map (the corrected predicted fingerprint map refers to the actual drilling fingerprint map of the drilling well, and the original predicted fingerprint map is corrected and corrected by the actual drilling) is used for adjusting and predicting the mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilling interval of the next step.
Preferably, the method for analyzing the drill well stuck layer analyzes the change rule of an actually measured mineral combination attribute fingerprint map and a logging attribute fingerprint map of a completed drill well around the drill well, expands the rule to the whole area by using a variation function and comprises the following specific processes:
and analyzing the vertical variation processes of the actually measured vertical mineral combination attribute fingerprint map and the logging attribute fingerprint map of each single well of the drilled well to be drilled around the drilled well, summarizing the variation regularity, and expanding the regularity to the whole region vertical direction by using the variation function of the vertical variation.
The well drilling stuck layer analysis method preferably analyzes the change rule of an actually measured mineral combination attribute fingerprint map and a well logging attribute fingerprint map of a completed well around a to-be-drilled well, expands the rule to a whole area by using a variation function and represents the rule in the following specific process:
analyzing the actually measured plane mineral combination attribute fingerprint map and the logging attribute fingerprint map of a plurality of completed wells around the well to be drilled, summarizing the change regularity of the actually measured plane mineral combination attribute fingerprint map and the logging attribute fingerprint map, and expanding the regularity to the whole-area transverse direction by using a plane variation function for representation.
The invention provides a well drilling bed-stuck analysis device based on mineral combination and logging attribute fingerprint maps, which comprises:
the first processing unit is used for analyzing the change rule of the combination attribute fingerprint map and the logging attribute fingerprint map of the actual drilling minerals of the drilled wells around the to-be-drilled wells and expressing the change rule by using a variation function;
the second processing unit is used for predicting the mineral combination attribute fingerprint image and the logging attribute fingerprint image to be drilled before drilling on the basis of the variation function and the spatial continuity characteristics of the seismic data to obtain a predicted fingerprint image to be drilled;
and the third processing unit is used for correcting the predicted fingerprint map of the drilling well by utilizing the actual drilling mineral combination attribute fingerprint map and the logging attribute fingerprint map of the completed drilling well in the drilling process, and adjusting and predicting the mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilling interval of the next step by utilizing the corrected predicted fingerprint map.
A third aspect of the invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described drill stuck layer analysis method.
A fourth aspect of the present invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above-mentioned drill stuck layer analysis method when executing the computer program.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. compared with the conventional on-site floor blocking method, the method has the advantages that the influence of the mastering degree of the partition principle of the floor block by the personnel in the conventional on-site floor blocking and the floor blocking experience is overcome, the artificial performance is reduced, and the real-time performance of the floor blocking is improved; in the actual drilling process of the target well, the mineral attribute and logging attribute prediction fingerprint map and the actual drilling fingerprint map are jointly used, so that the position uncertainty of purely utilizing lithologic mineral combination and the multi-solution property of purely utilizing a logging curve are effectively overcome, the reflection of underground information is more comprehensive and deep, and the prediction and the bed sticking precision of a key layer are improved.
2. The application of the method also enables the original stratum blocking method which passively waits for lithologic identification by rock debris fishing and characteristic identification of logging while drilling curves to be adjusted into a continuous and cyclic process of pre-drilling evaluation by using a model, prediction by using drilled wells around the wells, continuous iteration, correction and re-prediction by using information of strata encountered by drilling during drilling, thereby greatly improving the accuracy and precision of the stratum blocking on a drilling site.
Drawings
FIG. 1 is a characteristic diagram of a demarcation mineral profile of well A according to an embodiment of the present invention;
FIG. 2 is a diagram of the lithological property fingerprint of the boundary between two sections of the Yingying sea group and one section of the Huangliu group according to the embodiment of the present invention;
fig. 3 is a flowchart of a method for performing key horizon mining by applying a lithology attribute fingerprint diagram according to the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention are described clearly and completely below, and it is obvious that the described embodiments are some, not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The accurate card of the key horizon of the drilling site is directly related to the target horizon of the drilling, the position of the risk horizon can be judged, and the improvement of the accuracy degree is a powerful guarantee for reasonably selecting the well completion process of the drilling and effectively avoiding the drilling risk. The existing field layer blocking personnel generally utilize the change characteristics of the rock debris while drilling, lithology combination and logging while drilling to block the layer, which is not only related to the degree of grasp of the layer blocking personnel on the division principle of the block stratum, but also the recognition among different layer blocking personnel often has certain difference, which often leads the field layer blocking recognition to show larger divergence, thereby leading the layer position of the drilling well to be adjusted and changed after the drilling well is finished for a long time.
The division and comparison of the key strata are marked by lithological combination and paleontological fossil combination difference, different lithological combinations are usually corresponding to different deposition environments, and the difference of the deposition environments can cause the difference of mineral composition combination and electrical characteristics. Generally, near a larger deposition discontinuity, lithological change has the characteristic of being more remarkable, and accurate layer clamping by utilizing lithological combination and electrical characteristic difference is relatively easy in a drilling site; however, near an interface where the deposition is relatively continuous or the deposition discontinuity is relatively small, the change of the lithological combination is often characterized by gradual transition, and if the lithological combination or the log curve change is only used for visually comparing the stuck layers, the difficulty is high, and the characteristic of relatively high subjectivity is often brought.
Therefore, the invention provides a method for accurately predicting and blocking strata by fully utilizing the intrinsic mineral combination (feldspar, quartz, clay minerals and carbonate minerals) characteristics causing lithologic combination change and a logging (gamma, sound wave, density and various apparent resistivity curves) characteristic fingerprint map method, and aims to fully utilize the difference of the attribute fingerprint maps of rock debris and logging data between different strata in the process of drilling to block strata while drilling.
Attribute fingerprinting is a biometric technique that has found widespread use in identity verification, but has not found use in well drilling. From fig. 1 and 2, it can be seen that different stratigraphic units have larger differences in mineral composition and logging, wherein the mineral property fingerprint is obtained by directly utilizing the percentage content of various minerals, and the specific method is as follows: performing mineral combination analysis on rock strata in a certain range above and below the clamped layer, and then performing fingerprint mapping on the percentage content of minerals; the acquisition of the logging attribute fingerprint map is obtained by using logging data while drilling or after drilling, and the specific process is as follows: because the numerical ranges of different logging curves are very different, the logging curves near the target interval need to be standardized, and then the attribute fingerprint map of various logging data is mapped.
The mineral attribute fingerprint map and the logging attribute fingerprint map are the inherent manifestation of stratum lithologic combination change or deposition environment subtle change, the attribute fingerprint maps between different deposition strata have different characteristics, and the real-time performance and the accuracy of a field card layer can be greatly improved by comparing and analyzing the characteristics of the attribute fingerprint maps between different strata and utilizing the characteristic difference of the attribute fingerprint maps above and below a key layer to be clamped.
The attribute fingerprint map has the characteristics of being relatively intuitive, and has the characteristics of being relatively obvious among different sedimentary strata, because the attribute fingerprint map is the inherent embodiment of lithologic combination change. Although the lithological combination near each interface has certain stability and always has certain change in space, the change is usually controlled by the regional deposition environment on a plane to show a stronger plane distribution rule and by the change of the watt phase law or deposition cycle on a vertical direction, so that the change regularity near each key layer needs to be summarized on the vertical direction and the plane, and the variation function is the most powerful tool for representing the change, thereby achieving the prediction of the key layer and the integrated operation of the clamping layer.
The invention provides a well drilling stuck layer analysis method based on mineral combination and a logging attribute fingerprint map, which comprises the following specific steps:
1) extraction of key layer position characteristic attribute fingerprint image
Extracting lithologic minerals of each single well of the completed well around the well to be drilled and the vertical variation process of the logging attribute fingerprint map respectively, summarizing the regularity of the variation, and expressing the regularity by using a variation function of vertical variation; and summarizing a plane change rule on the plane by taking the finished well plane spread characteristics as the basis and combining the sedimentary facies influence control factors, and expressing the plane change rule by using a plane change function.
The variation function of the vertical variation is specifically as follows:
wherein V (h) is a vertical or horizontal variation function value; z (x)i) Is mineral content or logging property value; h is a vertical variation.
The plane variation function is specifically as follows:
wherein V (h) is a horizontal direction variation function value; z (x)i) Is mineral content or logging property value; and x is the horizontal direction variation.
2) Based on minerals extracted from wells around a well to be drilled and a logging attribute fingerprint, and taking a summarized vertical variation and plane variation function as a guarantee, and taking the transverse continuity of seismic data (the seismic data comprises migration seismic data and stacked seismic data) (the transverse continuity refers to: the seismic section event is mainly the result of structure horizon interpretation and fault interpretation by applying three-dimensional earthquake. ) For constraint, the lithologic minerals to be drilled and the logging property fingerprint are subjected to pre-drilling prediction (as shown in figure 1).
3) In the drilling process, the predicted result is continuously corrected through drilling the lithologic minerals and the measured fingerprint image of the logging attribute of the encountered layer section, and the lithologic minerals and the measured fingerprint image of the logging attribute drilled in the next step are adjusted and predicted, so that the aim of accurate layer blocking is fulfilled through continuous iteration, correction and prediction, and then correction and prediction are carried out.
Fig. 1 and 2 show an embodiment of the present invention, which is illustrated by using A, B wells drilled in the west of the south sea as an example. The Yingge sea group two sections and the Huangliu group one section are two adjacent rock stratum units, the interface is the card layer interface aimed at in the invention, the upper part of the invention is the Yingge sea group two sections, and the lower part is the Huangliu group one section.
As can be seen from fig. 1, the feldspar and carbonate mineral contents of the warrior sea group section above the interface and the yellow river group section below are substantially equivalent, but the clay mineral content is significantly increased while the quartz content is significantly decreased, and the center of gravity is significantly left-biased.
As can be seen from fig. 2, the acoustic wave (DTCO) and the natural Gamma (GR) are significantly increased in the ingale sea group segment above the lithologic interface, while the induced resistivity (AT90, AT30, AT10) is significantly decreased, the fingerprint pattern is significantly shifted to the upper right, the sides of the polygon are approximately equilateral below the interface, and the sides above the interface are greatly different.
Certainly, after the drilling is completed, the drilling process, the attribute prediction and adjustment process can be subjected to overall re-duplication, various parameter selection criteria in the drilling process are compared and researched, and the difference between the mineral attribute fingerprint image and the logging attribute fingerprint image which affect the accuracy of the on-site horizon acquisition is compared and researched, so that experience and training are provided for the next drilling on-site horizon acquisition, and the accurate acquisition of the key horizon is a continuously improved and deep process.
The mineral and logging attribute fingerprint map is embodied by lithologic combination relation, and the mineral and logging attribute fingerprint map is organically combined and comprehensively applied to a drilling field stuck layer, so that the effects of mutual supplement and mutual evidence can be achieved, and the improvement of the stuck layer precision and the accurate calibration of a key layer are facilitated.
The invention provides a well drilling bed-stuck analysis device based on mineral combination and logging attribute fingerprint maps, which comprises:
the first processing unit is used for analyzing the change rule of the combination attribute fingerprint map and the logging attribute fingerprint map of the actual drilling minerals of the drilled wells around the to-be-drilled wells and expressing the change rule by using a variation function;
the second processing unit is used for predicting the mineral combination attribute fingerprint image and the logging attribute fingerprint image to be drilled before drilling on the basis of the variation function and the spatial continuity characteristics of the seismic data to obtain a predicted fingerprint image to be drilled;
and the third processing unit is used for correcting the predicted fingerprint map of the drilling well by utilizing the actual drilling mineral combination attribute fingerprint map and the logging attribute fingerprint map of the completed drilling well in the drilling process, and adjusting and predicting the mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilling interval of the next step by utilizing the corrected predicted fingerprint map.
A third aspect of the invention provides a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described drill stuck layer analysis method.
A fourth aspect of the present invention provides a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above-mentioned drill stuck layer analysis method when executing the computer program.
The present invention is described in terms of flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to specific embodiments. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams 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.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A well drilling stuck layer analysis method based on mineral combination and logging attribute fingerprint maps is characterized by comprising the following steps:
analyzing the change rule of the actually drilled mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilled well to be drilled around the drilled well, and expressing the change rule by using a variation function;
performing pre-drilling prediction on a mineral combination attribute fingerprint map and a logging attribute fingerprint map to be drilled based on the variation function and by using the spatial continuity characteristics of seismic data to obtain a predicted fingerprint map to be drilled;
in the drilling process, the actual drilling mineral combination attribute fingerprint map and the logging attribute fingerprint map of the completed well are used for correcting the predicted fingerprint map of the well, and the corrected predicted fingerprint map is used for adjusting and predicting the mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilling interval in the next step.
2. The drill stuck layer analysis method according to claim 1, characterized in that the change law of the measured mineral composition attribute fingerprint map and the logging attribute fingerprint map of the completed well around the to-be-drilled well is analyzed, and the law is expanded to the whole area representation by the variation function, and the specific process is as follows:
and analyzing the vertical variation processes of the actually measured vertical mineral combination attribute fingerprint map and the logging attribute fingerprint map of each single well of the drilled well to be drilled around the drilled well, summarizing the variation regularity, and expanding the regularity to the whole region vertical direction by using the variation function of the vertical variation.
3. The drill stuck layer analysis method according to claim 2, characterized in that the change law of the measured mineral composition attribute fingerprint map and the logging attribute fingerprint map of the completed well around the to-be-drilled well is analyzed, and the law is expanded to the whole area by the variation function, and the specific process is as follows:
analyzing the actually measured plane mineral combination attribute fingerprint and the logging attribute fingerprint of a plurality of completed wells around the well to be drilled, summarizing the change regularity, and expanding the regularity to the whole-area transverse direction expression by using a plane variation function.
4. A well drilling card layer analysis device based on mineral combination and logging attribute fingerprint maps is characterized by comprising:
the first processing unit is used for analyzing the change rule of the combination attribute fingerprint map and the logging attribute fingerprint map of the actual drilling minerals of the drilled wells around the to-be-drilled wells and expressing the change rule by using a variation function;
the second processing unit is used for predicting the mineral combination attribute fingerprint image and the logging attribute fingerprint image to be drilled before drilling on the basis of the variation function and the spatial continuity characteristics of the seismic data to obtain a predicted fingerprint image to be drilled;
and the third processing unit is used for correcting the predicted fingerprint map of the drilling well by utilizing the actual drilling mineral combination attribute fingerprint map and the logging attribute fingerprint map of the completed drilling well in the drilling process, and adjusting and predicting the mineral combination attribute fingerprint map and the logging attribute fingerprint map of the drilling interval of the next step by utilizing the corrected predicted fingerprint map.
5. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method of drill stuck layer analysis according to any one of claims 1-3.
6. A computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor when executing the computer program performs the steps of the method of drill cuttings layer analysis of any of claims 1-3.
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