δ18O值无明显差别、FecarbMncarb含量较高,推测其白云石化流体来源相同,为海水衍生的弱还原性孔隙水。(3)研究剖面由下至上从 型共生组合到 型共生组合沉积序列的垂向演化,反映了蒸发潮坪环境中共生体系的典型白云石化过程,即随着海平面上升,从S1段至S2段由潮上带准同生萨布哈白云石化演化为潮间带—潮下带渗透回流白云石化, 型共生组合中白云岩的MREEFecarb含量高于 型共生组合白云岩,反映白云石化流体性质从富Fe2+-Mn2+MREE向贫Fe2+-Mn2+MREE的演化。研究认识丰富了共生体系下白云岩成因的基础理论,可为马家沟组油气勘探提供理论指导。"/> Research on dolomitization process in dolomite-evaporite syngenetic system of the Majiagou Formation in Ordos Basin
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JOPC  2024, Vol. 26 Issue (4): 895-910    DOI: 10.7605/gdlxb.2024.04.036
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Research on dolomitization process in dolomite-evaporite syngenetic system of the Majiagou Formation in Ordos Basin
WU Yuting1,2,3, NING Meng1,2,3, XIA Pan1,2,3, QIAO Zhanfeng4,5, YU Zhou4,5, WEN Huaguo1,2,3
1 State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Chengdu University of Technology,Chengdu 610059,China;
2 Institute of Sedimentary Geology,Chengdu University of Technology,Chengdu 610059,China;
3 Chengdu University of Technology Research Branch,Key Laboratory of Carbonate Reservoir,CNPC,Chengdu 610059,China;
4 PetroChina Hangzhou Research Institute of Geology,Hangzhou 310023,China;
5 Key Laboratory of Carbonate Reservoir,CNPC,Hangzhou 310023,China
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