Formation of low permeability reservoir and typical case analysis in Kuqa Depression

  • LI Qianw en ,
  • JIN Zhenkui ,
  • JIANG Fujie
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  • 1. College of Geosciences, China University of Petroleum, Beijing 102249, China; 2. Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla 841000, Xinjiang, China

Online published: 2014-06-06

Abstract

With the development of oil and gas exploration, the low permeability reservoirs have been a significant target of oil and gas exploration and development. Based on the study on Cretaceous low-porosity and low-permeability reservoir of Kelasu tectonic zone in Kuqa Depression, Tarim Basin, we summarized the characteristics of low permeability reservoir, and discussed its formation mechanisms and controlling factors. The result shows that low permeability reservoirs can be divided into 3 types accorded to the genetic differences: primary low permeability reservoir, secondary low permeability reservoir and fractured low permeability reservoir. The origin of the low permeability reservoir is impacted jointly by deposition, diagenesis and later tectonism. Deposition is the most fundamental reason for the low permeability reservoir, and strong compaction and cementation account mainly for it. Dissolution and later tectonic fractures increase the porosity and permeability of the reservoir, and that are the key factors for the low permeability in deep reservoir.

Cite this article

LI Qianw en , JIN Zhenkui , JIANG Fujie . Formation of low permeability reservoir and typical case analysis in Kuqa Depression[J]. Lithologic Reservoirs, 2014 , 26(3) : 28 -37 . DOI: 10.3969/j.issn.1673-8926.2014.03.006

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