沁水盆地南部煤层气田勘探开发技术探索与认识

为加快煤层气勘探开发的步伐，中国石油华北油田公司在沁水盆地南部樊庄区块开展了高煤阶煤层气规模开发实践，逐步形成了山地浅层二维及三维地震采集处理和精细解释、高煤阶煤层气区带评价优选、煤层气排采控制、煤层气二次压裂解堵增产、水平井设计优选、水平井钻井、适合于山区特点的煤层气低压集输工艺及自动化控制等8大技术系列。率先开展了煤层气水平井压裂解堵试验，改进了防砂、防煤粉工艺，创新提出了开发单元和开发井组，自主研发了一批专有技术（目前已申请专利11项）。总结近5年的煤层气勘探开发实践，获得以下几点经验与认识：①煤层气井钻探需要地震资料的支持；②严格遵守勘探程序是高效开发煤层气的重要保证；③煤岩煤质是煤层气富集最重要的控制因素之一；④该区埋深介于800～1 200 m的主力煤层具有良好的勘探开发前景。

Exploration and development technologies in the CBM gas fields of the southern Qinshui Basin

To speed up the shale gas exploration and development in China,the PetroChina North China Oilfield Company has gained many good experiences from the commercial CBM gas production in high-rank coal beds in the Fanzhuang Block of the southern Qin-shui Basin.On this basis,a series of special technologies are summarized from the following eight aspects:2Dand 3Dseismic data acquisition at shallow formations of the mountainous areas,optimal evaluation of CBM gas exploration target zones with high-rank coals,CBM g...