Analysis shows characteristics of micro faults in gas reservoirs, indicating effective prediction methods.
The Bozi-Dabei Block is currently one of the main blocks for increasing reserves and production in the Tarim Oilfield. However, the remaining trap scale in this block has decreased, and the situation of gas reservoir water invasion is severe. It is urgent to study the mechanism and distribution characteristics of micro faults. This study is based on seismic, logging, and geological data, starting from the differences in regional tectonic evolution in the Bozi-Dabei area, and analyzing the differences in segmented deformation of control ring faults. Focusing on typical gas reservoirs, analyze the structural, sedimentary response characteristics, and seismic reflection characteristics of micro faults, establish a set of micro fault identification and prediction methods, comprehensively analyze the results of structural analysis, sand box physical simulation, and geophysical interpretation, clarify the main controlling factors of micro fault development, analyze the development laws of micro faults, and based on this, analyze the structural, sedimentary response characteristics, and seismic reflection characteristics of micro faults, and preliminarily establish a set of micro fault identification and prediction methods. Finally, fine fault identification and prediction were carried out on key gas reservoirs, and the results showed that this method can effectively identify and clearly characterize fine faults inside the gas reservoir.
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Wang et al. (2025) studied this question.
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