Practice and understanding of tight sand gas reservoir development in western Sichuan,China

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  • 1.Exploration and Development Institute of Southwest Petroleum Branch Company,SINOPEC,Chengdu 610041,China;
    2.Sichuan Petroleum Engineering Construction Co.Ltd.,Chengdu 610041,China

Received date: 2015-08-04

  Revised date: 2015-11-03

  Online published: 2019-09-19

Abstract

By means of nuclear magnetic resonance(NMR),constant speed mercury penetration,thin section analysis,phase permeability experiment and physical simulation of core depletion development,tight sand gas reservoirs development in western Sichuan can be divided into three main types in terms of geological characteristics:(1)Multiple-overlapped blanket tight sand gas reservoir,with the geological features of stable lateral sand distribution,high-degree vertical overlapping and high-degree original irreducible water saturation;and its development model is to adopt separate-layer fracturing and commingled production for vertical wells improving mining-employed reserves and to adopt sand fracturing and foam drainage gas recovery for horizontal wells improving the well productivity;(2)Multiple-overlapped striped tight sand gas reservoir with the geological features of small-sized sandstone volume and thin sand layer;and its development model is to adopt commingled production and interlayer potential tapping,improving recoverable reserves of single well and to adopt booster-pressure production and HP/LP separate transmission method in the later stage of development;(3)Thin shale-sand inter-bed blanket tight-sand gas reservoir with the geological features of several thin shale-sands overlapping or in lenticular bedding;and its development model is to adopt progressive development and appraisal method reducing development risks,commingled production,potential tapping,booster-pressure production and foam drainage gas recovery method.

Cite this article

Duan Yong-ming, Zhang Yan, Liu Cheng-chuan, Zeng Yan, Wu Ge, Bo Tao, Deng Mei-zhou, Yin Hui-min . Practice and understanding of tight sand gas reservoir development in western Sichuan,China[J]. Natural Gas Geoscience, 2016 , 27(7) : 1352 -1359 . DOI: 10.11764/j.issn.1672-1926.2016.07.1352

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