Review on Overseas Exploration and Exploitation of Shale Gas

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.