Method for evaluating performance of shale gas reservoir, device, and computer storage medium

Abstract

The invention provides a method for evaluating the performance of a shale gas reservoir, a device, and a computer storage medium. According to the method, based on a plurality of geological parametersof a target shale gas reservoir, a first characterization parameter of the target shale gas reservoir is calculated, the geological parameters are obtained through well logging interpretation, the first characterization parameter is used to represent the reserve of the target shale gas reservoir; based on well logging data and the geological parameters, a second characterization parameter of thetarget shale gas reservoir is calculated, the second characterization parameter is used to represent the deformation degree of the target shale gas reservoir after cracking; according to the first characterization parameter and the second characterization parameter, the performance of the target shale gas reservoir is obtained through a designated evaluation rule, and the evaluation rule is used to define the ranges of the first characterization parameter and the second characterization parameter that represent different performances of a shale gas reservoir. The provided method can simply andefficiently evaluate the gas storing performance of a reservoir.

Description

technical field [0001] This specification relates to the geological field of petroleum and natural gas development, and in particular relates to a method, device and computer storage medium for evaluating the performance of shale gas reservoirs. Background technique [0002] As an unconventional natural gas resource, shale gas has its own particularity compared with conventional oil and gas reservoirs. Firstly, the "self-generation and self-storage" type of accumulation mode determines that its own hydrocarbon generation ability and storage ability are the key factors affecting the quality of the reservoir; secondly, the occurrence state of shale gas can include two types: free and adsorbed. , the former is mainly controlled by the effective porosity and gas saturation, and the latter is related to the content of organic matter; finally, due to the tightness of shale reservoirs, horizontal wells and hydraulic fracturing must be used for production. Layers need to undergo ar...

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Problems solved by technology

[0004] The commonality of the above methods is that geological parameters of different dimensions are used as independent evaluation indicators, some evaluation indicators have a greater impact on the performance of shale gas reservoirs, and some evaluation indicators have less impact on the performance of shale gas reservoirs, In order to obtain more accurate evaluation results, it is necessary to constantly adjust the weights of these evaluation indicators; in addition, attention is paid to various factors affecting shale gas reservoirs, but the internal relationship between various parameters is ignored, resulting in a classification scheme that is too complicated. Or the results have great uncertainty, it is difficult to effectively apply and guide practice in production

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