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Types and Distribution of Carboniferous Carbonate Reservoirs in Southern Д Area of Pre-Caspian Basin

Jin Bo1,2, Huang Xianxiong3, Chang Guangfa1, Zhang Shengbin2, Fu Haibo2, Li Tiezhu2   

  1. 1.CNPC International (Nile) Ltd., Beijing120001,China;
    2.Great Wall Drilling Company,CNPC, Beijing100101,China;
    3.CNPC International (Aktobe) Joint Stock Company, Beijing120001,China
  • Received:2014-03-12 Online:2014-11-26 Published:2014-11-26

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Abstract:

Given the shortage  of core and mud logging data on the Д zone of Carboniferous KT-II of the southern of Д area in the eastern edge of Pre-Caspin basin, The oolitic dolomitic limestone on the lower of Д1 layer was defined as favorable reservoir layer in Carboniferous KT-II by the detailed analysis on borehole data in the southern of Д area in the eastern margin of Pre-Caspin basin. This favorable reservoir in Д1 layer are pore-vug-fracture composite and pore-fracture. The favorable sedimentary facies belt with beach miscorfacies of shoal subfacies in open platform facies is determined combined with the paleostructure and sedimentary facies. The carbonate rock reservoir in Д1 layer was controlled with both original depositional environments and dolomitization. Based on the sedimentary facies constraints and the optional seismic attributes selection with the pre-stack and post stack inversion, the advantageous reservoirs distribution with NE-SW belts on Д1 layer is predicted considering the thickness, porosity, fracture and hydrocarbon indicator on carbonate rock reservoir.All these provide the effective and prospective geological references for drilling and production for KT-II.

Key words: carbonate reservoir, Carboniferous, reservoir, Caspian basin

CLC Number: 

  • P631.8
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