Deep-layer shale reservoir brittleness evaluation method and computer readable storage medium

Abstract

The invention relates to a deep-layer shale reservoir brittleness evaluation method and a computer readable storage medium. The deep-layer shale reservoir brittleness evaluation method comprises the steps that the Rickman brittleness index of a deep-layer shale reservoir is determined; and according to the stratum pressure of the deep-layer shale reservoir and the overlying stratum pressure, the effective pressure of the deep-layer shale reservoir is determined; according to the index relation between the brittleness index of the deep-layer shale reservoir and the effective pressure, the Rickman brittleness index is adjusted, and the brittleness index of the deep-layer shale reservoir is obtained. According to the provided method, the Rickman brittleness index is adopted for well indicating the rock brittle mineral content and other inherent attributes, the index relation between the brittleness index of the deep-layer shale reservoir and the effective pressure is utilized, the brittleness index of the deep-layer shale reservoir is obtained, effective evaluation of the deep-layer shale reservoir brittleness is achieved, and the deep-layer shale reservoir brittleness prediction result is more reasonable.

Description

technical field [0001] The present application relates to the field of oil and gas exploration and development, in particular to a deep shale reservoir brittleness evaluation method and a computer-readable storage medium. Background technique [0002] The world's shale oil and gas resources are very rich, and it is regarded as an alternative energy source for conventional oil and gas. Among them, the deep shale oil and gas reserves are also very considerable, and it has gradually become the research focus of oil and gas geophysicists recently. In particular, brittleness evaluation, which is closely related to the design of fracturing stimulation and development schemes, has become a major problem in the field of oil and gas exploration and development. [0003] At present, there are mainly four evaluation methods for reservoir brittleness at home and abroad: (1) measuring the mineral content in the laboratory to characterize the brittleness; (2) using the elastic mechanical ...

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Problems solved by technology

[0015] However, the inventors of the present application found that the existing shale reservoir brittleness seismic evaluation technology mainly studies shallow shale target areas, and there is a problem of inaccuracy when directly used for deep shale target processing

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