CUI JunPing

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Yuanyuan Ji

Chinese Research Academy of Environmental Sciences

Guilin Yang

Northwest University

Kun Wang

Washington University in St. Louis

Faqi He

Sinopec (China)

ZHANG YuanYuan

Zhanli Ren

Northwest University

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Northwest University

State Key Laboratory of Continental Dynamics

Chinese Research Academy of Environmental Sciences

Nanjing Audit University

Xinjiang Agricultural University

Yangzhou University

Northeastern University

Shanghai Ocean University

State Key Laboratory of Oncogene and Related Genes

Shanghai Jiao Tong University

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Meso-Cenozoic structural characteristics and their reservoir controls of structural transition area in China Craton: A case study of Yanchang Formation in Zhenjing area of southwestern Ordos Basin

Acta Petrologica Sinica (2020)

ZHANG YuanYuan Zhanli Ren Faqi He CUI JunPing Guilin Yang

基于三维地震、测井、岩矿测试等资料，分析了镇泾地区中生界断裂体系特征与成因，结合源岩热演化与储层物性反演结果，恢复了长8段油气成藏的动态演化过程，探讨了中生代以来构造活动对长8段油气成藏的影响作用。研究认为鄂尔多斯盆地内部镇泾构造转折区构造变形受盆地边缘影响明显，发育复杂断裂体系，构造特征及演化对油气藏的形成与分布有重要控制作用。结果表明：（1）中生界北西向、北东东向、近东西向3组断裂发育，平面上呈雁列式带状展布，剖面上为高陡产状且小断距错动。印支期北西向主断裂走滑明显，中、晚燕山期北东向断裂活动加强，喜山期北东东向次级断裂密度增大，并派生大量剪切裂隙。（2）长8段油藏经历了晚三叠世储集层、烃源岩层初始沉积形成，早白垩世初期少量低熟油近源充注形成岩性油藏，早白垩世末成熟油快速输导形成受断层及裂缝控制的构造-岩性油气藏，晚白垩世以来早期油藏调整等4个阶段。（3）印支运动控制了烃源岩及储层展布范围，Ⅰ类北西向走滑断裂控制了镇泾地区中生界构造格局；中、晚燕山运动加速烃源岩热演化进程，并改善储层物性，Ⅱ类断裂活动，为烃类输导提供垂向通道；喜山运动使先存中生界断裂活动，控制油气调整范围及油藏差异富集；其中北东东向Ⅱ类张性或张扭性断裂导流性能好，是最为有效的富油断层。

10.18654/1000-0569/2020.11.18

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