秦岭—大别造山带北侧盆地序列及油气前景

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

秦岭—大别造山带北侧存在多个盆地,其中有些盆地中已有一定的油气显示。近年来地质、地球化学研究成果表明,秦岭—大别造山带北侧主要发育6个世代的盆地序列,分别是:1)被动大陆边缘盆地(-C1—O2);2)弧后盆地(O2—C1);3)残余盆地(C2—T2),其中可分为残余盆地第1阶段(C2—P12)和残余盆地第2阶段(P12—T2);4)陆内前陆盆地(T3—J2);5)张扭性盆地(J3—K1);6)断—拗盆地(K2—E)。秦岭—大别造山带北侧盆地发育6套烃源岩层系,分别是古近系、下白垩统、下侏罗统、上三叠统、石炭—二叠系和下古生界,并进行了相关烃源岩层系的成藏特征分析。东秦岭—大别山北侧主要勘探层系第一位的是石炭—二叠系,第二位是下白垩统,第三位是上三叠统,第四位是古近系,而中—下侏罗统及下古生界可列为第五位。建议勘探选区是一类盆地为周口盆地、济源盆地和洛—伊盆地。有利区带是谭庄—沈丘凹陷、倪丘集凹陷、襄城凹陷、舞阳凹陷、孟县—温县凹陷和洛阳凹陷。

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 Qinling- Dabie mountain ： 1 ） passive continental margin basin （ ∈1 - O2 ）, 2 ） back-arc basin （O2 - C1 ）, 3） residual basin （C2 - T2 ）, the stage 1 （ C2 - P2^1 ） and stage 2 （P2^1 - 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.