Logging Evaluation Technology of Tight Sandstone Gas Reservoir in Western Sichuan and Its Development Prospect

doi:10.11885/j.issn.1674-5086.2022.01.25.03

Abstract

Abstract: Tight sandstone gas reservoirs in western Sichuan have the geological characteristics of low porosity, low permeability, diverse pore structure, and complex gas-water relationship, which makes the parameters such as porosity, permeability and water saturation obtained by traditional logging evaluation technology with low accuracy. Well evaluation is prone to bias, so it is urgent to carry out research on targeted well logging evaluation technology. This paper takes the complex channel tight sandstone gas reservoir in the Shaximiao Formation in the Zhongjiang River as the research object, and combines the exploration and development practice of gas reservoirs. Based on the standardization of logging curves based on sedimentary microfacies constraints, multiple regression, BP neural network, flow-based reservoir physical property evaluation technology of the unit and the multi-factor intersection, the fluid identification radar map based on multi-factor discrimination, and the saturation evaluation model with variable $m$ and $n$ parameters are the core of the tight sandstone gas reservoir logging evaluation technology system, which is Zhongjiang Shaximiao. It provides strong support for the efficient development of gas reservoirs. The formed logging evaluation technology system for tight sandstone gas reservoirs provides an effective reference for related research on the same type of gas reservoirs.

Key words: tight sandstone gas reservoir, logging evaluation, logging curve standardization, five-property relationship, flow unit, fluid identification

CLC Number:

TE15

LIU Chengchuan, CHEN Jun, CHENG Hongliang. Logging Evaluation Technology of Tight Sandstone Gas Reservoir in Western Sichuan and Its Development Prospect[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2022, 44(3): 59-69.

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