文档介绍：
不同产能类型井间煤储层渗透率动态变化
特征比较分析#
朱启朋,桑树勋,刘世奇**
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(中国矿业大学(徐州)资源与地球科学学院,江苏徐州 221008)
摘要:以樊庄区块 5 口煤层气井为例,模拟其渗透率动态变化趋势,对比分析不同产能特征
下渗透率动态变化情况,探讨不同生产阶段排采制度对煤储层渗透率的控制作用。研究结果
表明,不同排采阶段,不同产能类型煤层气井的煤储层渗透率动态变化特征差异明显:产水
阶段,受有效应力影响,低产水井煤储层渗透率下降幅度大于高产水井,产气阶段,在煤基
质收缩效应的作用下,高产气井煤储层渗透率恢复程度高于中低产气井和产水井。
关键词:煤层气;产能特征;渗透率;动态变化;排采制度;
中图分类号:
The Dynamic Variation Characteristic Analysis of Coal
Reservoir Permeability of Different Productivity Feature
CBM Wells
ZHU Qipeng, Sang Shuxun, Liu Shiqi
(The School of Resource and Earth Science, China University of Mining Technology, Xuzhou
City 221008)
Abstract: Taking 5 CBM wells in FanZhuang block as example, this paper simulated the dynamic
change trend of permeability, analyzed the permeability dynamic change under different capacity
characteristics, investigated the control action of production system on reservoir permeability
coalbed methane’s productivity. Research results show that dynamic change characteristics of coal
reservoir permeability under different productivity type and different production stages are
different obviously: in water production stage, affected by the effective stress, coal reservoir
permeability of low water production wells declines greater than the high water production wells;
in gas production stage, coal reservoir permeability’s recovery degree of high yield gas wel