Deep or super-deep dolostone reservoirs:Opportunities and challenges
Chen Daizhao1, 2, Qian Yixiong3
1 Key Laboratory of Petroleum Resource Research,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029 ; 2 University of Chinese Academy of Sciences,Beijing 100049 ; 3 Wuxi Research Institute of Petroleum Geology,Petroleum Exploration & Production Research Institute, SINOPEC,Wuxi 214126,Jiangsu
Abstract Deep or super-deep dolostone reservoirs tend to be the important exploration field and targets in the future. Resulting from dolomite replacement and dissolution,abundant volumes of secondary porosity were commonly produced,which made the dolostones the potential high-quality petroleum reservoirs. In this context,it is imperative to reveal the mechanisms of dolomitization,porosity generation and preservation,as well as to investigate responsible fluid attributes and evolution pathay,then to establish reliable geological reservoir models. Under documenting the core issues related to “dolomite problems”,this review listed the major dolomitization models,present bandawagons,and main concerns in future dolomite studies,particularly for the deeply-buried dolostones experiencing complicated tectonic and fluid modifications. In China,abundant dolostones occur at great depths of >6500,m in the three largest cratonic sedimentary basins(Sichuan Basin,Tarim Basin and Ordos Basin), which have contributed numerical commercial petroleum reserves and provided favourable opportunities for petroleum exploration in deep or super￣deep formations. However,big challenges would also exist due to the great burial depths,multiple-phase,superimposed tectonic overprinting and complicated history of basin-fluid evolution.
Fund:Co-funded by National Science Foundation of China and SINOPEC Foundation(No. U1663209)and National Science and Oil Major Project(No.2011ZX05008-003)
About author: About the first author Chen Daizhao,born in 1963,is a doctor and research professor. He is mainly engaged in carbonate rock sedimentary(including dolomitization),organic-rich sediments and palaeo￣oceanography, sedimentury geochemistry, and boundary event and earth system proccesses. E-mail: dzh-chen@mail.iggcas.ac.cn.
Cite this article:
Chen Daizhao,Qian Yixiong. Deep or super-deep dolostone reservoirs:Opportunities and challenges[J]. JOPC, 2017, 19(2): 187-196.
Chen Daizhao,Qian Yixiong. Deep or super-deep dolostone reservoirs:Opportunities and challenges[J]. JOPC, 2017, 19(2): 187-196.
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