摘要
根据多种方法分析结果对准噶尔盆地沙窝地地区下侏罗统三工河组储层特征进行了研究,结果表明:其成分成熟度较低、结构成熟度较高;孔隙度主要属特低孔—中孔,渗透率属特低渗—中渗,主要孔隙类型为原生粒间孔、溶蚀-改造粒间孔和粒内溶孔,孔隙类别以特大孔为主,而喉道类别以微细喉为主;成岩作用类型主要为机械压实作用、胶结作用、溶蚀和交代作用,成岩阶段处于中成岩期,成岩演化过程中机械压实作用、胶结作用导致储层孔隙度减小约24.0%,同时因溶蚀作用使孔隙度增大约3.0%。
Based on the results of several analytical methods, the reservoir characteristics of Lower Jurassic Sangonghe Formation in Shawodi area of Junggar basin are analyzed. The results show that the reservoir has low compositional maturity and high textural maturity, with low-mid porosity and low-mid permeability. The porosity types are mainly primary intergranular pore, corrosion-modification intergranular pore and intragranular corrosion pore. The throat is mainly micro-throat. The diageneses mainly include compaction, cementation, dissolution and displacement. The diagenetic evolution is in the middle diagenetic stage. During this period, the compaction and cementation cause the reservoir porosity to decrease about 24.0% and the dissolution causes the porosity to increase about 3.0%.
出处
《岩性油气藏》
CSCD
2008年第3期27-33,共7页
Lithologic Reservoirs
基金
中国石化石油勘探开发研究院科研项目“准中地区成岩作用研究及储层综合评价”资助。
关键词
三工河组储层
岩石学特征
孔隙度
渗透率特征
孔隙结构
成岩作用
沙窝地地区
Sangonghe Formation
petrology characteristics
characteristics of porosity and permeability
pore structure
diagenesis
Shawodi area
