Production Characteristics and Extraction Rules of Ordinary Pressure Shale Gas Wells in Anchang Syncline
The buried depth of Anchang syncline shale reservoir is 2 000-3 500 m,with pressure coefficient of 1.0-1.1,belonging to middle-deep ordinary pressure shale.Compared with main shale gas reservoirs such as Jiaoshiba,Weiyuan,Changning and Pengshui in China,Anchang block has a certain resource base,but due to the small reservoir thickness and low pressure coefficient,the development difficulty is relatively high.This paper summarized the overall characteristics of the ordinary pressure shale gas of Anchang syncline,including fast gas breakthrough,low production capacity,and poor stable production capacity,and compared the production characteristics of the deep shale gas well,divided the production process of the ordinary pressure shale gas well of Anchang syncline into three stages:liquid discharge period,gas breakthrough period and declining period,and briefly analyzed the extraction effect of various processes in different stages,providing reference for the exploration of the development mode and drainage and gas production process system of ordinary pressure shale gas wells in China.
ordinary pressure shale gasproduction characteristicsAnchang synclineshale gas extraction
万方数据
维普
