The differential evolution of buried hills in Liaodong Bay area and analysis on their reservoir forming conditions

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  • 1.State Key Laboratory of Petroleum Resource and Prospecting,China University of Petroleum,Beijing 102249,China;
    2.Department of Geology,China University of Petroleum,Beijing 102249,China;
    3.Bureau of Geophysics Prospecting Inc.,CNPC,Research Center of Geology,Zhuozhou 072700,China

Received date: 2015-08-27

  Revised date: 2015-11-16

  Online published: 2019-09-19

Abstract

The evolutionary process and reservoir formation conditions of Liaodong and Liaoxi buried hills structural belts in Liaodong Bay area are different.According to the latest geological and seismic data,combined with regional tectonic evolution background and exploration practice,the heterogeneity of lithology and structure of buried hills,and their evolutionary process and hydrocarbon accumulation conditions were investigated.The results show that,the bedrocks are various in outcrop range on the plane and the vertical structure.These are fundamentally controlled by their evolutionary processes.The Liaoxi buried hill has undergone multi-phase inversion since Mesozoic and Early Cenozoic extensional rifting;Liaodong buried hill has undergone the Eocene extensional rift,and regional compressional inversion and torsion of Tan-Lu fault zone in Late Oligocene.The different evolutionary processes of two buried hills leading to the hydrocarbon source,reservoir condition and cap condition of Liaodong buried hill are worse than Liaoxi buried hill,and late strike-slip faults may destroy and adjust the previous oil and gas reservoir of Liaodong buried hill,making its ability to gather oil and gas far less than Liaoxi buried hill.

Cite this article

Yang Ke-ji, Qi Jia-fu, Yu Yi-xin, Ping Ying-qi, Gao Qiang, Lv Ji . The differential evolution of buried hills in Liaodong Bay area and analysis on their reservoir forming conditions[J]. Natural Gas Geoscience, 2016 , 27(6) : 1014 -1024 . DOI: 10.11764/j.issn.1672-1926.2016.06.1014

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