Study on Control Factors and Genetic Model of Karst in the Ordovician of Tahe Oilfield

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Main production layers of Tahe oilfield are Ordovician carbonate karst reservoirs, but the control factors of this series of karst reservoirs remains unclear. Combining with drilling, seismic data etc., this paper analysis the control factors of karst from 3 aspects that fractures, paleogeomorphy and unconformity surface in this paper. Research shows that the main control factors of karst are fractures and their associated cracks, unconformity surface and karst landforms. Unconformity surface, karst landforms are the main control factors of karst in early Hercynian period. Fractures and their associated cracks are the important control factors of karst in middle Caledonian and early Hercynian period. On the basis, summarizes genetic model graph of karst.

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1057-1062

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December 2012

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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