沁水盆地高阶煤层气勘探开发实践与思考

Practice and thought of coalbed methane exploration and development in Qinshui Basin

经过30余年的探索,沁水盆地煤层气勘探开发已取得重要突破,突破了国外"高阶煤"产气缺陷理论认识,成为我国目前最重要的煤层气生产基地。然而,沁水盆地煤层气开发规模性发展也面临着深化理论认识、突破关键技术、实现效益开发三大关键科学技术问题。面对这些问题,需加强3方面的科技攻关:一是深化基础理论认识,突出高阶煤储层的针对性以及提升单井产量的指导性,突破"甜点区"优选、储层改造地质适应性和高效排采等技术瓶颈;二是强化关键技术攻关,坚持地质-工程一体化,创新和完善测井-地震联合储层和物性预测、高效钻井-完井-储层改造及配套技术以及精细化与智能化排采控制技术;三是提升开发效益,建立钻、采、输一体化管理技术模式。

Through 30 years of exploration,an important breakthrough has been made in coalbed methane( CBM) exploration and development,and the theory of CBM production limitation in high rank coal has been rewritten in Qinshui Basin,where has now become an important CBM production base in China. However,there are still some challenges on deepening the theoretical understanding,breaking through key technologies and accomplishing efficient CBM development. Therefore,the research in three aspects should be stressed to overcome the facing problems. Firstly,theories should be further developed to improve the single well production guidance,including establishing reliable 'sweet spot'evaluation method and providing fitting reservoir stimulation and efficient gas drainage technologies in terms of the characteristics of high rank coal. Secondly,some key technologies research should be strengthen including the integration of geology and engineering,the reservoir properties prediction by joint of log and seismic,drilling-completionreservoir stimulation and their supporting technologies,and delicate and intelligent drainage control technology. The last,to enhance the development efficiency,the drilling,mining,transport integration management mode should be established.