大庆石油地质与开发

2015, v.34;No.168(02) 48-53

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川西南部须二段储层岩石学特征对孔隙发育的影响
INFLUENCES OF THE PETROLOGIC CHARACTERISTICS ON THE PORE DEVELOPMENT FOR MEMBER XU-2 RESERVOIRS IN THE SOUTH OF WEST SICHUAN BASIN

蒋裕强,刁昱翔,王猛,蒋婵,马华灵,刘枢
JIANG Yuqiang,DIAO Yuxiang,WANG Meng,JIANG Chan,MA Hualing,LIU Shu

摘要(Abstract):

应用岩石薄片鉴定、阴极发光及储层物性分析等手段,分析了川西南部须二段储层岩石学特征对孔隙发育的影响。研究表明:岩屑类型,石英、长石、杂基含量及碎屑粒度结构对成岩作用影响最大;石英和硬质岩屑的大量存在增加了岩石的抗压强度;长石、可溶岩屑为后期的溶蚀作用奠定了基础;塑性岩屑、杂基的压实变形充填了孔隙,破坏了储层物性;碎屑颗粒的粒度控制了岩石的抗压强度;岩石类型对储层物性的影响主要表现在岩石的碎屑组分和粒度结构对储层物性的综合影响上。
By means of the detection of the common thin sections,analyses of cathode luminescence and physical properties and so on,the influences of the petrologic characteristics on the pore development are analyzed for Member Xu-2 in the south of West Sichuan Basin.The studies show that the diagenesis is mainly affected by the debris types,contents of the quartz,feldspar and matrix and the structures of the clastic particles;the abundance of the quartz and hard debris increases the compressive strength of the rock;the feldspar and the soluble debris are a foundation of the later dissolution;the compaction and deformation of the plastic debris and matrix makes the pores filled,thus the reservoir properties are destroyed;the grain sizes of the clastic particles control the compaction resistance;the influences of the rock types on the properties are mainly displayed in the comprehensive affects of the debris compositions and grain size structures on the physical properties.

关键词(KeyWords): 川西南部;须二段;储层;岩石学特征;孔隙;成岩作用
the south of West Sichuan Basin;Member Xu-2;reservoir;petrologic feature;pore;digenesis

Abstract:

Keywords:

基金项目(Foundation): 国家科技重大专项“大型油气田及煤层气开发”子课题“四川盆地上三叠统低孔渗储层形成机理研究”(2011ZX05001-005-02)

作者(Author): 蒋裕强,刁昱翔,王猛,蒋婵,马华灵,刘枢
JIANG Yuqiang,DIAO Yuxiang,WANG Meng,JIANG Chan,MA Hualing,LIU Shu

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