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Basin edge complex tectonic zone normal-pressure shale gas horizontal well integrated design method

A design method and horizontal well technology, applied in the direction of production fluid, earthwork drilling, wellbore/well components, etc., can solve the problems that cannot meet the needs of efficient exploration of shale gas in complex structural belts, and improve the economic benefits of single wells , Improving the drilling time efficiency and improving the effect of fracturing stimulation

Inactive Publication Date: 2019-10-01
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology

[0003] The existing methods and technologies for shale gas horizontal well design are mainly aimed at structurally stable areas, which cannot meet the needs of efficient exploration of shale gas in complex structural belts

Method used

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  • Basin edge complex tectonic zone normal-pressure shale gas horizontal well integrated design method
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Embodiment Construction

[0032] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0033] Example figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 and Image 6 As shown, this example takes the southeast basin edge of Chongqing

[0034] Well A in the complex zone is taken as an example. Well A is a shale gas horizontal well located in the structurally complex area, and the target interval is five

[0035] The shale in the lower Feng Formation-Longmaxi Formation is typical. Based on the integrated design method of shale gas horizontal wells

[0036] Research on the analysis, selection and determination of well location deployment, horizontal well orientation optimization and fracturing scheme design.

[0037] The first step is to evaluate the geological sweet spots based on the bottom structure map, porosity map, gas content map and pressure coefficient map of the Wufeng Formation-Longmaxi Formation in this are...

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Abstract

The invention relates to a basin edge complex tectonic zone normal-pressure shale gas horizontal well integrated design method. In the design process, for the characteristics that such as the Southeast Chongqing basin edge transition zone is strong in tectonic deformation, and the geological condition is complex, through superposition evaluation of a structural figure, a burial depth figure, a porosity figure, a gas content figure, a pressure coefficient figure and a curvature figure, geology and engineering optimal dessert areas are optimized, well sites are deployed, the seismic attribute isused for predicting stratum seam hole development situation, interval intvl losing is avoided, the well drilling aging is improved, and through target window and horizontal well orientation optimization and curvature prediction, the reservoir stratum fracturing effect is improved, the reservoir stratum capacity is sufficiently released, the single well economic benefits are improved, the technical support is provided for efficient exploration and development of the basin edge transition zone shale gas, operation is high, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the field of designing oil and natural gas exploration and development, and in particular relates to an integrated design method for normal-pressure shale gas horizontal wells in basin margin complex structural belts. Background technique [0002] In the past ten years, learning from foreign countries, especially North America’s advanced experience in shale gas exploration and development, China’s shale gas has made major breakthroughs in the Sichuan Basin, and successively discovered large shale gas fields such as Fuling, Weiyuan, Changning, and Weirong. Positive progress has also been made in shale gas exploration in the basin-margin transform zone in the southeast. Many exploration wells in Nanchuan, Wulong, Pengshui and other areas have achieved commercial discoveries, which proves that atmospheric shale gas has good resource potential and development prospects. At the same time, characteristic technologies such as target e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B43/30E21B43/26
CPCE21B43/26E21B43/305
Inventor 何希鹏高玉巧刘明何贵松汪凯明张培先臧素华张勇薛野李彦靖
Owner CHINA PETROLEUM & CHEM CORP
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