沁水盆地南部储层压力分布规律和控制因素研究

摘要

In order to have a correct and full understanding on the parameters of the coal bed methane, the injection, the pressure drop method and the hydraulic fracturing method was applied to the test and measurement on the parameter of the coal bed methanereservoir. The reservoir pressure and the ground stress parameters of 83 reservoirs in 55 wells in the south part of Qinshui Basin were obtained. The distribution law of the coal bed methane reservoir pressures in the south part of Qinshui Basin and the control factors of the structure stress, buried depth, ground stress and others were studied. The st（ldy resulis showed that the pressure of the coal bed methane reservoir in the south part of Qinshui Basin would be mainly the low pressure reservoirs. In the several blocks of the south part in Qinshui Basin, the reservoir pressure gradient of the Zhengzhuang Block would be the highest, the Shizhuang Block and Fanzhuang Block would be the second and the rain reservoir pressure gradient would be Daning Block and Panzhuang Block. The structure stress, buried depth, ground stress and underground water mineralization would be the major factors to control the reservoir pressure.%为对煤储层参数有更加全面的认识，采用注入／压降法和水力致裂法对煤层气储层参数进行试验测试，测得沁水盆地南部55口井共83层煤的储层压力和地应力储层参数，研究了沁水盆地南部煤层气储层压力的分布规律和控制因素（构造应力、埋深、地应力等）。结果表明：沁水盆地南部煤层气储层压力以低压储层为主；沁水盆地南部的几个区块中，郑庄区块的储层压力梯度最大，其次是柿庄区块和樊庄区块，储层压力梯度最小的是大宁区块和潘庄区块，构造应力、埋深、地应力及地下水矿化度是控制储层压力的主要因素。