古地理学报2017，Vol.19Issue(5)：907-918,12.DOI:10.7605/gdlxb.2017.05.070
准噶尔盆地中央坳陷莫索湾地区侏罗系三工河组深层致密砂岩气储集层特征及成因
Characteristics and origin of deep tight sandstone gas reservoirs of the Jurassic Sangonghe Formation, Mosuowan area,Central Depression, Junggar Basin
摘要
Abstract
The characteristics and origin of densification of the tight gas reservoirs from the Member 1 of Jurassic Sagonghe Formation,Junggar Basin were investigated through analyses of cores,thin sections and scanning electron microscope images,and well logging data.The results show that:(1) The studied reservoirs can be categorized as typical deep tight sandstone gas reservoirs that show ultra-low porosity and permeability with average burial depth lower than 4500 m.(2) The reservoir sandstones are interpreted to be subaqueous distributary channel sandstones that were formed in a shallow-water deltaic to lacustrine environment.(3) The lithology of the reservoir rocks is dominated by fine-to silty-fine-grained sandstones with high components of lithic grain and ductile lithic grain and low components of cement.(4) The pore space of the reservoir is mainly characterized by a mixture of pore types with middle to fine pores and fine throats.The throats and pores are highly heterogeneous with poor connectivity and percolation.Finally,lithological composition,compaction and cementation are considered to be the main controls of the formation of the studied tight gas reservoirs.关键词
准噶尔盆地/莫索湾地区/三工河组/深层致密砂岩气储集层/致密化成因Key words
Junggar Basin/Mosuowan area/Sangonghe Formation/deep tight sandstone gas reservoir/origin of densification分类
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孙靖,吴爱成,王然,曾德龙,王峰,薛晶晶..准噶尔盆地中央坳陷莫索湾地区侏罗系三工河组深层致密砂岩气储集层特征及成因[J].古地理学报,2017,19(5):907-918,12.基金项目
国家重点基础研究发展计划(973计划)项目(编号:2014CB239001)和国家科技重大专项(编号:2016ZX05047-001)联合资助.[Co-funded by the National Basic Research Program of China(973 Program)(No.2014CB239001) and the National Science and Technology Major Project(No.2016ZX05047-001)] （973计划）
