准东阜东斜坡区上侏罗统齐古组砂岩成岩作用及孔隙演化分析  

Analysis of Pore Evolution and Diagenesis in Sandstones of Qigu Formation of Upper Jurassic,East of Fukang Sag,East of Junggar Basin

作　　者：况昊[1] 祁利祺 谭先锋[1] 余娟[3] 

机构地区：[1]重庆科技学院石油与天然气工程学院,重庆401331 [2]新疆油田公司实验检测研究院,新疆克拉玛依834000 [3]新疆油田公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆地质》2015年第4期493-497,共5页Xinjiang Geology

基　　金：国家自然科学基金项目(41202043);中国石油科技创新基金项目(2014D-5006-0108)共同资助

摘　　要：据重点井岩心观察资料及岩石、铸体薄片、X-衍射、扫描电镜及阴极发光等资料,对研究区齐古组砂岩储层成岩作用及孔隙演化特征进行分析。研究区齐古组储集层主要为细-中砂岩,成分成熟度偏低,结构成熟度较高。经历的成岩作用类型主要为压实-压溶作用、胶结作用和溶蚀作用。孔隙类型主要以原生粒间孔为主。齐古组砂岩主要处于中成岩阶段A期,孔隙演化与成岩作用密切相关,压实及化学胶结作用是齐古组储集层储集性能变差的主要因素。Sandstones in Qigu Formation of upper Jurassic are reservoirs with medium porosity and low permeability in east of Fukang sag, east of Junggar Basin. To ascertain pore evolution and diagenesis of reservoirs in Qigu Formaiton,multiple analysis methods were adopted, including cores observation of key wells, general slice and casting slice identification of sandstone, scan electron microscope,X- ray diffraction, etc. Fine to medium sandstone is the main sandstone type, with low composition maturation and high fabric maturation. And reservoirs are mainly undergoes compaction, cementation and dissolution processes. Native of intergranular pores are the main pore types, then are secondary pores. Diagenesis reaches A- period of middle diagenesis stage, and pore evolution has close relation with diagenesis, the result shows that compaction and chemical cementation are main factors to make reservoir property bad in study area.

关 键 词：准噶尔盆地 阜康凹陷 齐古组 成岩作用 孔隙演化 

分 类 号：P618.13[天文地球—矿床学]