Structural geology and favorable exploration prospect belts in northwestern Sichuan Basin, SW China

CHEN Zhuxin,LI Wei,WANG Lining,LEI Yongliang,YANG Guang,ZHANG Benjian,YIN Hong,YUAN Baoguo

Table 1 The regional distribution of the deep-buried favorable exploration reservoirs and structural belts in northwestern Sichuan Basin.

Region Tectonic location Favorable reservoirs Source rocks Palaeotectonic settings Favorable exploration belts Central- East Front of Micangshan Sinian Dengying Formation Lower Cambiran Platform, platform margin Jiulongshan anticline, Tongziguan structure Middle-Upper Permian Lower Cambiran, Middle-Upper Permian Basin interior Sinian Dengying Formation Lower Cambiran Platform, platform margin Yating slope, Zitong syncline Lower Paleozoic, Middle Permian Lower Cambiran, Middle-Upper Permian Paleo-uplift, Paleo-slope Zitong syncline Southwest Northern front of Longmeshan Upper Paleozoic Lower Cambiran, Lower-Middle Permian Passive continental margin Deep-seated fold and thrust structures under the Zhongba, Haitangpu, Shuangyushi, and so on Northwest Lower Paleozoic, Second Member of Dengying Formation Lower Cambiran Platform, platform margin Kuangshangliang-Shilongliang belt, Shuangyushi-Shejianhe belt Middle Permian, Second Member of Dengying Formation, Lower Cambiran; Lower-Middle Permian