深煤层地应力对储层物性的影响  

Impact of geo-stress to reservoir characters in deep coal seams

作　　者：郑贵强[1] 李文军[1] 朱雪征[1] 郭敬中[1] 

机构地区：[1]华北科技学院安全工程学院,河北燕郊101601

出　　处：《辽宁工程技术大学学报（自然科学版）》2016年第10期1037-1040,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家重大科技专项项目(2011ZX05042-001);中央高校基本科研业务费项目(3142014001;3142013097;3142015025)

摘　　要：为有针对性地研究深部煤层气地应力对储层物性的影响.采用分析浅部储层物性并结合深部数据进行分析和模拟的方法,探讨了深部地应力对渗透率、孔隙度、含气性和储层压力的影响.研究结果表明:在深部,渗透率的下降并不完全符合指数函数的关系,其下降程度并没有那么快.在深部温度对于含气量的控制作用更大.温度的增加造成两种结果:在盖层封闭条件好的情况下,使生气量和游离气的含量增加,对于煤层气的产出造成积极影响;反之则对煤层气的产出造成消极影响.随着有效应力的增加,孔隙度呈逐渐下降的趋势.随着地应力的增加,在深部储层压力也相应地呈线性增加.To study the reservoir characters in deep coal seams, this paper utilized the analysis method based on the shallow reservoir characters combined with analyzing and simulating method of reservoir characters of deep coal seams, and studied the impact of geo-stress to reservoir characters including permeability, porosity, gas content and reservoir pressure in deep coal seams. The results of this study shows that the decline of permeability does not fit the exponential function relationship. The permeability in deep coal seams is better than expected. Besides, the controlling effect of temperature is bigger than geo-stress. The gas content in deep coal seams has two different results depending on the seal condition. Moreover, the porosity shows decline trend with the increasing of effective stress and trend is obvious at low effective stress phase. The reservoir pressure in deep coal seams increases with the increasing of geo-stress.

关 键 词：深煤层 煤层气 地应力 渗透率 含气量 地温 

分 类 号：TD712[矿业工程—矿井通风与安全]