Natural Gas Geoscience >

2014 , Vol. 25 >Issue 12: 1962 - 1974

DOI: https://doi.org/10.11764/j.issn.1672-1926.2014.12.1962

Characteristics and Forming Mechanism of Large Scaled Sandstone Reservoirs in Xujiahe Formation,Sichuan Basin,Southwest China

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  • 1.Research Institute of Petroleum Exploration& Development，PetroChina，Beijing 100083，China;
    2.Langfang Branch,PetroChina Research Institute of Petroleum Exploration and Development,Langfang 065007,China;
    3.PetroChina Southwest Oil and Gas Field Company,Chengdu 610051,China;
    4.Sichuan Geophysical Company,CNPC Chuangqing Drilling Engineering Company Limited,Chengdu 610213,China

Received date: 2014-04-16

  Revised date: 2014-06-23

  Online published: 2019-09-18

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Abstract

The natural gas resource in Xujiahe Formation Sichuan Basin is huge,which has become one of the most important layers for the gas exploration and reserve incresement in the Southwest oil/gas company CNPC.The natural gas is mainly stored in large scaled sandstone reservoirs of members Xu2,Xu4,and Xu6.Based on outcrops and well data,the inner texture and scale of single sandbody in Xujiahe Formation is analyzed.Then the characteristic of sandbody is described,and the forming mechanism of the large scaled sandtone reservoirs is studied.It can be found that the single sandbody is small,but the quantity of the sandbodies is large.The single sandbody stacks with each other in the following four patterns: high frequency cutting,low frequency cutting,lapping,and isolated.The sandbodies stacked with each other vertically,and laped with each other laterally,forming the clustered large-scaled sandstone reservoirs.The distributing character of sandstone reservoir resulted in the distribution of natural gas resource in large area with low abundance.

Key words： Large scaled sandstone reservoir; Characteristics; Forming mechanism; Xujiahe Formation; Sichuan Basin

Cite this article

XU Zhao-hui, HU Su-yun, WANG Ze-cheng, WANG Lu, BIAN Cong-sheng, ZHONG Bo, WU Yu-lin . Characteristics and Forming Mechanism of Large Scaled Sandstone Reservoirs in Xujiahe Formation,Sichuan Basin,Southwest China[J]. Natural Gas Geoscience, 2014 , 25(12) : 1962 -1974 . DOI: 10.11764/j.issn.1672-1926.2014.12.1962

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