韩城矿区地应力特征及其对煤层气开发的影响  

Characteristics of Geostress and Its Impact on the Development of Coalbed Methane in Hancheng Mining Area

作　　者：邵先杰[1] 朱明[1] 彭英明[1] 霍梦颖 武宁[1] 岳鹏飞 何俊[1] 王兴 

机构地区：[1]燕山大学石油工程系,河北秦皇岛066004

出　　处：《重庆科技学院学报（自然科学版）》2018年第1期15-19,共5页Journal of Chongqing University of Science and Technology：Natural Sciences Edition

基　　金：国家科技重大专项"煤层气藏储渗空间特征及渗流机理研究"(2011ZX05038-001);河北省自然科学基金项目"火烧煤层提高煤层气采收率机理及关键技术研究"(D2016203253)

摘　　要：采用数学计算法,结合韩城矿区实际生产数据,探讨地应力的分布特征及其对煤层气开发的影响。研究发现,横向上矿区西部的最小水平应力值一般大于东部,纵向上应力值呈现先减少后增大的趋势。随着地应力增加,煤体结构向糜棱煤转化,煤储层渗透能力减小。韩城矿区水平主应力差异系数以小于0.47为主,稳产期日产量随着差异系数的增加而增加。地应力等值线图与煤层气产气量等值线图在平面上有较好的吻合性。Based on the practical production data of Hancheng mining area, this article discusses the distribution characteristics of geostress and its impact on coalbed methane development by mathematical calculation method. The study found the value of minimum horizontal stress is generally greater in the west than the east on the trans- verse, while the longitudinal stress value tends to reduce first and then increase. With the increase of geostress, the coal structure changed from fragmentation coal to mylonite coal, and the coal reservoir permeability decreases. The coefficient of horizontal principal stress difference is literally less than 0.47, and the production increases with coef- ficient increasing. Geostress contour map is in accordance with the coalbed methane gas production contour map.

关 键 词：地应力 煤层气 储层物性 压裂 韩城矿区 

分 类 号：TD311[矿业工程—矿井建设]