Abstract
The structure of Anda area is located in the north of Xujiaweizi fault depression, which is a NNE trending depression, with west fault and East exceeding. The main target reservoir in this area is volcanic reservoir of the third member of Yingcheng formation. The reservoir lithology is complex, the physical property changes greatly, and the heterogeneity is strong, which brings some difficulties to the gas and water layer identification in this area. Due to the special influence of lithology and pore structure of volcanic rock, the relationship between gas and water in volcanic reservoir is relatively complex. Gas wells show different productivity characteristics and water production characteristics in the production process. Based on logging, logging and gas testing data, this paper analyzes the response characteristics of gas and water layer logging, establishes gas and water layer identification chart, comprehensively identifies gas and water layers, further deepens the understanding of gas reservoir geology in this area, and improves the gas well development efficiency.
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