Dynamic shale gas horizontal well stratum dip angle prediction method
By using a dynamic formation dip prediction method and updating a model based on seismic data and drilling data, the problem of inaccurate formation dip prediction in shale gas horizontal wells has been solved, achieving efficient drilling and cost savings.
CN122194282APending Publication Date: 2026-06-12CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information
- Application Number
- CN202411823477.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2026-06-12
AI Technical Summary
Technical Problem
In existing technologies, the prediction of formation dip angle in shale gas horizontal wells is inaccurate, which makes it easy for horizontal wells to pass through non-high-quality shale sections during drilling, affecting production and economic benefits.
Method used
By establishing a shale reservoir velocity model, compiling a structural map, and updating the model and structural map in real time with drilling data, the formation dip angle can be dynamically predicted, and the drill bit direction can be adjusted to improve prediction accuracy.
Benefits of technology
It improved the drilling rate and efficiency of high-quality shale in horizontal wells for shale gas, saved costs, and ensured high-quality exploration and development of shale gas.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention discloses a dynamic shale gas horizontal well stratum dip angle prediction method. The method comprises the steps that a shale reservoir velocity model is established; a shale reservoir structural map is compiled, the depths of target spots A and B of the shale gas horizontal well are designed, the target spot A is the starting position of the horizontal section of the shale gas horizontal well, and the target spot B is the ending position of the horizontal section of the shale gas horizontal well; calculating a stratigraphic dip angle alpha of the whole horizontal section according to the horizontal distance and the longitudinal distance between the target points A and B; after entering the target point A, predicting a stratigraphic dip angle beta by using the depth data of the head and tail points of the preset distance every time the target point A is drilled for the preset distance, updating the speed model by using the depth data of the head and tail points of the preset distance, and re-compiling the structural map, the stratum dip angle gamma of the next drilling distance of the horizontal section is predicted through the recompiled structural map, and the reference stratum dip angle theta of the next drilling distance of the horizontal section is determined according to the three stratum dip angles alpha, beta and gamma to serve as the guiding basis of horizontal well drilling. The method can effectively improve the high-quality shale drilling rate of the shale gas horizontal well, improve the drilling efficiency of the horizontal well and save the drilling cost.
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