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Volume 34 Issue 2
Apr.  2015
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SU Zhong-tang, LIU Na, YANG Wen-jing, HU Shang-cai, WU Chun-ying, PEI Wen-chao, REN Jun-feng. Types and models of supergene karst of Ordovician and reservoir characteristics in Ordos basin[J]. CARSOLOGICA SINICA, 2015, 34(2): 109-114. doi: 10.11932/karst20150203
Citation: SU Zhong-tang, LIU Na, YANG Wen-jing, HU Shang-cai, WU Chun-ying, PEI Wen-chao, REN Jun-feng. Types and models of supergene karst of Ordovician and reservoir characteristics in Ordos basin[J]. CARSOLOGICA SINICA, 2015, 34(2): 109-114. doi: 10.11932/karst20150203

Types and models of supergene karst of Ordovician and reservoir characteristics in Ordos basin

doi: 10.11932/karst20150203
  • Publish Date: 2015-04-25
  • Supergene karst reservoirs of Ordovician in Ordos is the most important type of carbonate reservoirs, while some breakthrough cannot be explained perfectly, indicating existence of different types of karst. Based on the analysis of paleotopography and cores and slices, this study suggests that the supergene karst of Ordovician can be divided into weathering crust karst and bedding karst,which include 4 subclasses in accordance with surrounding rocks. The characters of the weathering crust karst are different because of different rock fabric,while the easily dissolved component of rocks is dissolved preferentially when the bedding karst occurs. The weathering crust karst reservoirs are controlled by paleotopography and karst cycles as well as sedimentary facies, while paleotopography and sedimentary facies as well as grooves and fractures need to be considered when bedding karst reservoirs are forecasted.

     

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