摘要
在铸体薄片、扫描电镜、恒速压汞等实验资料的基础上,对临兴地区上石盒子组致密砂岩储层致密成因及优质储层发育机制进行分析。该地区上石盒子组砂岩类型主要为长石岩屑砂岩,砂岩储层物性整体差,储层以孔隙度小于10%、渗透率小于1 mD低孔特-低渗储层为主,局部为中孔低-中渗储层。储层物性受沉积相和成岩作用的双重影响,在沉积厚度大、沉积微相为分流河道和水下分流河道的砂体中,砂岩的储集物性好;早期压实作用和自生粘土矿物胶结作用是砂岩储层致密化的主要原因;绿泥石环边胶结对砂岩早期粒间孔隙起保护作用,长石颗粒强烈溶蚀形成的大量次生孔隙大大改善了砂岩的储层物性,是造成临兴地区上石盒子组盒2段、盒4段优质储层发育带的主要因素。
Based on the experimental data such as casting thin section,scanning electron microscope and constant rate mercury injection,the compact genesis and high-quality reservoir development mechanism of the tight sandstone reservoir of Upper Shihezi Formation in Linxing area are analyzed.The results show that the sandstone type of the Upper Shihezi Formation in this area is mainly feldspar lithic sandstone,and the physical properties of sandstone reservoirs are poor overall.The reservoir is mainly composed of low porosity special-low permeability reservoir with porosity less than 10%and permeability less than 1mD,and local medium porosity and low-medium permeability reservoir.The physical properties of the reservoir are affected by the sedimentary facies and diagenesis.The sandstone has good reservoir properties in the sand bodies with large sediment thickness and sedimentary microfacies as distributary channels and underwater distributary channels.Early compaction and authigenic clay mineral cementation are the main causes of the sandstone reservoir densification.The chlorite ring edge cement protects the early intergranular pores of the sandstone,and the large number of secondary pores formed by the strong dissolution of the feldspar particles greatly improves the reservoir physical properties of the sandstone.All these main factors cause the development of high-quality reservoirs in He 2 Member and He 4 Member of the Upper Shihezi Formation.
作者
王海燕
孙维昭
张智
王月胜
刘再振
WANG Hai-yan;SUN Wei-zhao;ZHANG Zhi;WANG Yue-sheng;LIU Zai-zhen(Unconventional Technology Institute,Drilling&Production Co.of Subsidiary of CNOOC Energy Technology&Services Limited,Tianjin 300452,China;Geophysical Research Institute of Bureau of Geophysical Prospecting INC.,China National Petroleum Corporation,Zhuozhou 072750,China;Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration,Gulin University of Technology,Gulin 541004,China)
出处
《桂林理工大学学报》
CAS
北大核心
2018年第3期392-400,共9页
Journal of Guilin University of Technology
基金
中海油能源发展股份有限公司重大专项(HFKJ-CJFZ-1302)
广西自然科学基金项目(2015GXNSFAA139238)
关键词
致密砂岩
溶蚀作用
优质储层
上石盒子组
临兴地区
tight sandstone
dissolution
high-quality reservoirs
Upper Shihezi Formation
Linxing area
