遂宁—蓬溪地区须二段储层成岩作用与孔隙演化

doi:10.3969/j.issn.1673-8926.2014.01.009

Lithologic Reservoirs ›› 2014, Vol. 26 ›› Issue (1): 58-66.doi: 10.3969/j.issn.1673-8926.2014.01.009

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Reservoir diagenesis and porosity evolution of the second member of Xujiahe Formation in Suining-Pengxi area

TAO Yanzhong¹， JIANG Yuqiang¹， WANG Meng¹， ZHANG Chun²， LI Zhengyong³， LIU Shu¹

1. School of Resource and Environment， Southwest Petroleum University， Chengdu 610500， China； 2. Research Institute of Exploration and Development， PetroChina Southwest Oil ＆ Gas Field Company， Chengdu 610051， China； 3. Chuanzhong Oil-Gas Exploration and Development Research Institute， PetroChina Southwest Oil ＆ Gas Field Company， Suining 629000， Sichuan， China

Online:2014-02-05 Published:2014-02-05

Abstract

Abstract:

Sandstone of the second member of Xujiahe Formation is an important natural gas reservoir with good exploration prospect in Suining-Pengxi area. The low porosity, low permeability and strong heterogeneity of the sandstone reservoir directly affected the oil and gas exploration and development in this area. Based on slice observation, SEM, inclusion thermometry, vitrinite reflectance and thermal degradeation, this paper systematically studied the types and intensity of diagenesis and porosity evolution of the second member of Xujiahe Fomation. The results show that the sandstone has undergone medium-strong compaction, strong cementation, weak metasomatism and strong corrosion. The reservoir is currently in the middle diagenetic A-B stage and the reservoir was almost completely compacted at middle diagenetic A stage. The pore type is mainly secondary pore. This paper provided geological evidence for favorable reservoir developing area via clear illustration of the process of sandstone reservoir compaction.

Key words: reservoir characteristics, source rocks, sedimentary facies, hydrocarbon accumulation, oil and gas transportation, Hongjingzi area

TAO Yanzhong， JIANG Yuqiang， WANG Meng， ZHANG Chun， LI Zhengyong， LIU Shu. Reservoir diagenesis and porosity evolution of the second member of Xujiahe Formation in Suining-Pengxi area[J].Lithologic Reservoirs, 2014, 26(1): 58-66.

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