摘要
安场向斜页岩储层埋深 2 000～3 500m,压力系数 1.0～1.1,属中深层常压页岩.对比国内焦石坝、威远、长宁、彭水等主要页岩气储层,安场区块具有一定的资源基础,但限于储层厚度小、压力系数低,开发难度较大.归纳总结出安场向斜常压页岩气具有见气快、产能低、稳产能力差的总体特点,对比深层页岩气井生产特征,将安场向斜常压页岩气井生产过程划分为排液期、见气期、递减期 3 个阶段,并简要分析了不同阶段各种工艺排采效果,为中国常压页岩气井开发模式和排水采气工艺体系的摸索提供了参考.
Abstract
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.
维普
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