A shale gas infill well interwell communication fracture network parameter fitting method

By establishing a parameter fitting method for inter-well interconnection fracture network, the fracture characteristics and seepage model of shale gas infill wells were obtained and fitted, solving the problem of inter-well interference in existing technologies and realizing rapid and accurate dynamic analysis of infill well production.

CN116933465BActive Publication Date: 2026-07-07CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA PETROLEUM & CHEMICAL CORP
Filing Date
2022-03-30
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing production dynamics analysis methods fail to consider inter-well interference, making them unsuitable for effective production dynamics analysis of infill wells, especially in fitting parameters of inter-well connectivity networks after fracturing in shale gas wells.

Method used

By acquiring well spacing infiltration characteristics, reservoir stimulation characteristics, and inter-well connectivity fracture characteristics, shale gas seepage models were established for near-well, far-well, and new wells in old wells. These models were then fitted with production dynamic data to obtain parameters such as the number of fractures, half-length, and permeability.

Benefits of technology

It enables rapid and accurate inversion of inter-well connectivity and fracture network parameters after fracturing of infill wells, solves the problem of inter-well interference affecting production dynamic analysis, and can perform more accurate production dynamic analysis of infill wells.

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Abstract

This invention discloses a method for fitting parameters of inter-well connectivity fracture network after fracturing infill wells in shale gas operations. The method includes: acquiring well spacing infill characteristics, reservoir stimulation characteristics, and inter-well connectivity fracture characteristics; acquiring near-well fracturing bodies, far-well fracturing bodies, near-well fractures, and far-well connectivity fractures; and acquiring production dynamic data of the old well before infill, the old well after infill, and the new well. It also establishes near-well shale gas seepage models for the old well, far-well shale gas seepage models for the old well, and near-well shale gas seepage models for the new well. Furthermore, it obtains the number of fractures, fracture half-length, and permeability of the fracturing body in the old well before infill; the number of interconnected fractures, conductivity, and permeability of the fracturing body in the far-well of the old well after infill; and the permeability, number of fractures, and fracture half-length of the fracturing body in the near-well of the new well. This invention considers issues such as inter-well fracture connectivity and the addition of new stimulation zones between new and old wells, enabling dynamic production analysis of infill wells.
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