Comparison between control factors of high quality continental reservoirs in Bohai Bay basin and Ordos basin |
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| Authors: | Junmao ZHENG Jun YOU Dongbo HE |
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| Institution: | (1) School of Energy Resources, China University of Geosciences, Beijing, 100083, China;(2) GNT International Inc., Beijing, 100029, China;(3) Ordos Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083, China |
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| Abstract: | Bohai Bay basin, a typical extensional rift basin, and Ordos basin, an intra-craton down-warped basin, represent two important
basin types in China. Because of their respective features, the main control factors for their high quality reservoirs are
different. In Bohai Bay basin, the sandbody shows great variety in types and severely separated distribution and its high
quality reservoirs are mostly controlled by the vertical secondary pore and vertical abnormal pressure. On the other hand,
the sandbody in Ordos basin features a relative lack of variety, good continuity, indistinct vertical zone, and its reservoirs
are mainly controlled by the diagenetic differentiation caused by different sedimentation inside the sandbody. Therefore,
in the Bohai Bay basin, the exploration should be based on the analysis of sedimentary facies and the favorable diagenetic
zones and formations. The focus in Ordos basin, however, should be put on the relatively high permeability sandstones in a
generally low permeable sandstone background.
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Translated from Geoscience, 2007, 21(2): 376–386 译自: 现代地质] |
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| Keywords: | high quality reservoir type of sandbody diagenesis control factor |
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