地应力是渗透率的重要控制因素，高产井主要分布在最小主应力相对较小的区域，因此地应力特征对高产区带的预测具有重要意义。分析了泌水盆地南部地区现代构造应力场对煤储层物性的控制机理，指出主应力差增大，渗透率呈指数形式急剧增高，而储层压力呈对数形式上升；试井地应力梯度尽管与渗透率、储层压力之间存在相关关系，但离散性较大。预测了3种有利的煤层气成藏类型，即大宁—潘庄—樊庄区带高主应力差—滞流封闭—浅埋型煤层气藏、沁水—郑庄—樊庄北和沁源—安泽区带中主应力差—缓流封闭—中埋型煤层气藏、郑庄北和沁源东—安泽东区带中主应力差—缓流封闭—深埋型煤层气藏。

Ground stress is an important control factor of permeability, high productivity wells are distributed mainly in the relatively less minimum principal stress areas, the ground stress character has important guidance meaning to the prediction of high productivity zones. The authors analyze the control mechanism of the modern tectonic stress field on the physical properties of coal reservoirs in the research area. With principal stress difference increasing, permeability increases sharply in exponential form, and reservoir pressure rises in logarithmic form. Ground stress gradient in well test has correlation with permeability and reservoir pressure, but it disperses widely. Three favorable CBM reservoir-forming types are predicted: High principal stress difference Stagnant trap-Shallow buried CBM reservoir forming type in the Daning Panzhuang-Fanzhuang zone; Medium principal stress difference-Slow flow trap-Medium buried CBM reservoir forming type in the Qinahui zhengzhuang North Fanzhuang and Qinyuan-Anze zone; and Medium principal stress difference Slow flow trap Deep buried CBM reservoir-forming type in the North Zhengzhuang and East Qinyuan-East Anze zone.