水文地质工程地质2017，Vol.44Issue(4)：124-128,159,6.DOI:10.16030/j.cnki.issn.1000-3665.2017.04.19
九里山煤矿垂直井起裂压力对煤层气产能的影响
Influence of fracturing pressure of vertical well to CBM capacity in Jiulishan coal mine
摘要
Abstract
Based on the elastic plane strain theory,this article deduces the crack pressure calculation formula of fracturing extraction wells under different geological constructions in order to summarize the successes and the failures of the fracturing extraction experiment in the Jiulishan coal mine of the Jiaozuo coal field.By comparing the computation results with the actual drainage test data,it is found that in the tensile fracture development areas,the overlarge fracture measures will do great harm to the impermeable bases of coal reservoirs near the coal bed gas wells,and the fracturing fractures spread to the L7-8 karst aquifer of the Taiyuan Group,resulting in a large number of underground water into the surface wells.The fierce river course of groundwater makes almost all the coal bed gas escape from the interspaces of the reservoir stratums where it stays.Additional water pressure makes it difficult for much coal bed gas absorbed in fissures to escape,so it cannot form a long-term stable single well scale output.关键词
九里山煤矿/“三软”煤层/煤层气垂直井/起裂压力Key words
Jiulishan coal mine/"three soft" coal seam/CBM vertical well/fracturing pressure分类
矿业与冶金引用本文复制引用
王志荣,郭志伟,徐培远,陈玲霞..九里山煤矿垂直井起裂压力对煤层气产能的影响[J].水文地质工程地质,2017,44(4):124-128,159,6.基金项目
国家自然科学基金项目(41272339) （41272339）
