BASIN SEQUENCE AND OIL-GAS POTENTIAL IN NEAR NORTHERN QINLING-DABIE MOUNTAIN

There are lots of basins which have contained some oil gas in near northern Qinling-Dabie mountain.The geological-geochemical research results showed that there are 6 basin generations in near northern QinlingDabie mountain: 1)passive continental margin basin(C₁-O₂),2)back-arc basin(O_{2-C1),3)residual basin(C2-T2),the stage 1(C2-P1²) and stage 2(P1²-T2),4)intracontinental foreland basin(T3-J2),5)extensional strike-slip basin(J3-K1),6)fault-depression basin(K2-E).Six source rock suites have been developed,Eogene system,Lower Cretaceous,Lower Jurassic,Upper Triassic,Carboniferous-Permian and Lower Palaeozoic in near northern Qinling-Dabie mountain.The main prospecting strata are Carboniferous-Permian,Lower Cretaceous,Upper Triassic and Eogene system in near northern Qinling-Dabie mountain.The Zhoukou Basin,Jiyuan Basin and Lao-Yi Basin are chosen as prospect.The Tanzhuang-Shenqiu Sag,Niqiuji Sag,Xiangcheng Sag,Wuyang Sag,Mengxian-Wenxian Sag and Luoyang Sag are chosen as favourite district.}