Comprehensive Potential Tapping and Control Measures of Xu2 Tight Sandstone Gas Reservoir in Hechuan

Abstract

AbstractAiming at the problems of low single well production, small well control dynamic reserves and ineffective development of class II and III reserves in Xu2 tight sandstone gas reservoir of Hechuan, this paper studies the influencing factors of gas field development effect and puts forward effective development countermeasures. Through in-depth analysis of the relationship between reservoir development, structural location, fault distribution, fluid type, seepage mode and productivity in three-dimensional space, the best matching relationship of relevant factors is found, and the high-yield well model of Hechuan Xuer gas reservoir is established to guide the development of gas field. The study shows that the effective reservoir is the basis of high production, fault distribution is the key of high production, and three-phase seepage is the main factor affecting the productivity. Based on the current situation of gas reservoir development, three development countermeasures are put forward: first, to optimize the favorable area with high or high structure; second, to build new wells in some areas with large well spacing considering economic benefits and ultimate recovery of reserves; third, to carry out long horizontal well + large-scale fracturing transformation test for the upper part of the second member of Xujiahe formation with low water saturation, so as to improve the production of single well. In the study, the matching relationship between reservoir permeability mode and productivity is established, and the gas reservoir development adjustment countermeasures are put forward, which can effectively improve the reserves producing degree of Xu2 gas reservoir in Hechuan, and provide guidance for the development countermeasures of Xujiahe Formation gas reservoir.KeywordsTight sandstoneXujiaheDevelopment effectProductivity