Lithologic Reservoirs ›› 2009, Vol. 21 ›› Issue (4): 47-52.doi: 10.3969/j.issn.1673-8926.2009.04.009

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Analysis of main controlling factors of Chang 6 reservoir in West Panguliang area， Ordos Basin

NIU Xiaobing 1，2， ZHU Yushuang1，LIANG Xiaowei2， XIN Honggang2， LIU Xiaojing2#br#   

  1. 1. Department of Geology， Northwest University， Xi’an 710069， China； 2. Institute of Petroleum Exploration and Development， Changqing Oilfield Branch Company， Xi’an 710018， China
  • Online:2009-12-16 Published:2009-12-16

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Abstract:

Based on the analysis of lithological characteristics, porosity and permeability characteristics, micro- pore structure characteristics and types of Chang 6 reservoir in West Panguliang area, the results showthat the sedimentary environment of Chang 6 reservoir is a delta front. Reservoir characteristics take on lower compositional maturity and medium textual maturity. The reservoir space types include residual intergranular pores, secondary corrosion pores, moldic pores and so on. The sedimentary microfacies, diagenesis and heterogeneity are main control factors for the reservoir properties. The diagenetic period of affecting reservoir development is stage A-B of middle diagenesis. And the gain-coating chlorite facies, feldspar corrosion facies and laumonite corrosion facies are favorable diagenetic facies belts for reservoir development. Five oil displacement types are distinguished by studying reservoir microscopic heterogeneity.

Key words: rifted lake basin, multi-cycle deposition, composite superimposed reservoir, advantageous phase, Qikou Sag

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