Lithologic Reservoirs ›› 2015, Vol. 27 ›› Issue (2): 70-76.doi: 10.3969/j.issn.1673-8926.2015.02.011

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Provenance and sedimentary facies evolution of Chang 8 oil reservoir set in Maling area, Ordos Basin

LEI Qihong 1，2， GAO Qiongyao 3，4， CHENG Liangbing 1，2， LI Jihong 3，4， YANG Yongxing 1，2， GAO Junfeng 3，4   

  1.  1. Research Institute of Exploration and Development ， PetroChina Changqing Oilfield Company ， Xi ’ an 710018 ， China ；2. National Engineering Laboratory for Exploration and Development of Low-permeability Oil and Gas Fields ，Xi ’ an 710021 ， China ； 3. Department of Geology ， Northwest University ， Xi ’ an 710069 ， China ；4. State key laboratory of continental dynamics ， Northwest University ， Xi ’ an 710069 ， China
  • Online:2015-03-03 Published:2015-03-03

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Abstract:

 Based on the petrology characteristics, sedimentary structure, biological fossils and grain-size distribution of cores from 15 drilling wells of Chang 8 oil reservoir set in Maling area, combined with heavy and light mineral combination characteristics, variational function of data structure and plane distribution of sand content, this paper analyzed the direction of provenanace and palaeocurrent. The results show that the provenanace and palaeocurrent came from the southwest and northeast of the study area, Chang 8 oil reservoir set developed shallow water front delta facies, and the sedimentary microfacies distribution of each sub-layer changed according to the water flow intensity from the two different directions.

Key words: constrained sparse spike inversion, wavelet extraction, low frequency model, the third member of Hetaoyuan Formation, reservioir prediction, Dupo Oilfield, Dupo Oilfield

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