Journal of Petroleum and Gas Exploration Research

Journal of Petroleum and Gas Exploration Research (ISSN 2276-6510) Vol. 4(3) pp. 48-52, April 2014. DOI: http:/dx.doi.org/10.14303/jpger.2014.100. Copyright © 2014 International Research Journals

 

Review

Diagenetic alterations and porosity evolution of oilsand reservoir in shaximiao formation, Houba area, Northwestern basin Sichuan

Xuefei Yang 1,2*, Xingzhi Wang 1,2, Hao Tang1,2, Nan Jang 1,2, Lingcheng Dai 1,2

1State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, Sichuan, China

2School of Resource and Environment, Southwest Petroleum University, Chengdu 610500, Sichuan, China)

*Corresponding author email address: 601988256@qq.com

Received February 10, 2014; Accepted March 6, 2014

Abstract

 

Oilsand in China is very rich, especially in northwestern Sichuan basin. Houba oilsand is one of the famous oilsand belts, it consists of medium-coarse grained sandstone with high porosity and permeability. The genesis of those pores is very important in the research of Houba oilsand reservoir. Based on thin section analyses, SEM observation and X-ray diffraction (XRD) analysis, the diagenesis and pore evolution of oilsand reservoir have been studied. It shows oilsand reservoir in Shaximiao Formation had experienced the early diagenesis and the late diagenesis including early mechanical compaction, four times cementation and two times dissolution. Diagenetic alterations affect the pore evolution in the long geology history. At last, porosity evolution model of the oilsand reservoir have been established. 

Keywords: Oilsand reservoir; Diagenetic alterations; Porosity evolution; Houba area, Northwestern Sichuan basin

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