国外页岩气勘探开发综述

Review on Overseas Exploration and Exploitation of Shale Gas

美国是世界上勘探开发页岩气最成功的国家,主要采用水平井+水力压裂进行开发。调研表明,页岩气资源量约占全球非常规天然气资源量的一半。国外页岩气勘探主要采用三维地震和微地震技术优化设计,已形成一套资源评价系统。国外钻井选择直井和水平井两种方式。完井储层改造多采用裸眼、筛管等完井方式,配合大型水力压裂改善页岩的超低渗透率。

The United States is the most successful country about shale gas exploration and exploitation,which makes exploitation mainly by horizontal wells ＋ hydraulic fracturing.Research shows that the amount of shale gas resource accounts for about half the amount in unconventional natural gas.It proposes a resource evaluation system by the three-dimensional seismic and micro-seismic technology in overseas shale gas exploration.There are two types of overseas drilling,including vertical wells and horizontal wells.The naked eye,screens and other completion methods are more used in completion.It improves the ultra-low permeability of shale with large-scale hydraulic fracturing.