【摘要】 通过压裂造缝和煤(储)层顶、底板地质特征研究,本文提出了4种煤层气压裂层位模型,即顶底板构造假整合及不整合压裂层位模型、顶板牵引褶皱压裂层位模型、底板底缘褶皱压裂层位模型。研究发现,选择在煤(储)层顶、底板合适层位进行压裂比在煤(储)层中进行压裂能更好地达到煤层气排采效果,并能将包括煤层顶、底板页岩气和致密气进行综合评价和综合利用,取得更好的经济效益。更多还原

【Abstract】 Based on the study of fracturing and geological characteristics of coal(reservoir) roof and floor, four kinds of coal seam gas pressure cracking layer models are proposed, namely the pseudo-integration and unconformity fracturing horizon model of roof and floor structure, the roof traction fracturing fracture layer model, and the bottom edge fold fracturing horizon model. It is found that choosing suitable strata in the top and floor of coal(reservoir) can achieve better CBM drainage and recovery effect than fracturing in coal(reservoir), and can comprehensively evaluate and synthetically utilize the shale gas and dense gas including the top and floor of coal seam, so as to achieve better economic benefits.更多还原