Lithologic Reservoirs >

2014 , Vol. 26 >Issue 1: 80 - 85

DOI: https://doi.org/10.3969/j.issn.1673-8926.2014.01.012

Characteristics of low permeability reservoir of Chang 2 reservoir in Xirengou area, Ordos Basin

  • QI Yalin ,
  • YIN Peng ,
  • ZHANG Dongyang ,
  • LI Jihong ,
  • LU Wei ,
  • BAI Chang’e
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  • 1. Institute of Shaanxi Yanchang Petroleum （Group） Co. Ltd.， Xi’an 710075， China； 2. Dingbian Oil Production Plant， Yanchang Oilfield Corporation， Yulin 718600， Shaanxi， Chin

Online published: 2014-02-05

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Abstract

Chang 2 reservoir in Xirengou area is typical low permeability reservoir. The sedimentary characteristics, lithology characteristics, reservoir properties, diagenesis types, pore texture and pore types of Chang 2 reservoir in Xirengou area were studied through analyzing the core, thin sections, scanning electronic microscope and physical properties. The result shows that Chang 2 reservoir developed in distributary channel has the characteristics of ultra-fined grain size of the deposits and low maturity, the pore types are mainly primary intergranular pores and secondary d issolved pores, and structural-lithologic trap is the main type of traps. A large number of arenopelitic and calcarenaceous interlayer that developed in the reservoir led to poor vertical differentiation of oil and water, and further separated reservoir, which makes the in-layer heterogeneity become stronger in single oil reservoir. The macro distribution of Chang 2 reservoir is controlled by local structure, reservoir lithology and physical properties.

Key words：  diagenetic facies; formation fluid; cements; Yanchang Formation; Ordos Basin

Cite this article

QI Yalin , YIN Peng , ZHANG Dongyang , LI Jihong , LU Wei , BAI Chang’e . Characteristics of low permeability reservoir of Chang 2 reservoir in Xirengou area, Ordos Basin[J]. Lithologic Reservoirs, 2014 , 26(1) : 80 -85 . DOI: 10.3969/j.issn.1673-8926.2014.01.012

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