梨树断陷十屋油田营城组砂岩成岩作用特征及孔隙演化  

Diagenesis characteristics and pore evolution of sandstone in Yingcheng Formation of Shiwu Oil Field in Lishu fault depression

作　　者：张鐘月 高福红[1] 杨扬[1] 张蕊瑶 王磊[1] 

机构地区：[1]吉林大学地球科学学院,长春130061

出　　处：《世界地质》2015年第1期157-166,共10页World Geology

基　　金：中国石化东北分公司勘探开发研究院生产科研项目(G1208-09-KK-005)

摘　　要：应用偏光显微镜、扫描电镜和X--射线衍射等方法,对梨树断陷十屋油田营城组储层砂岩的储层特征、成岩作用及孔隙演化进行了详细描述和分析。结果表明：十屋油田营城组储层砂岩的岩石类型主要为岩屑长石砂岩和长石岩屑砂岩,其次为长石砂岩;经历的主要成岩作用有压实作用、胶结作用、溶蚀作用和交代作用;成岩阶段已达到中成岩阶段A--B期。砂岩的喉道属于中-低喉级别,孔隙度平均为8%-10%,渗透率平均为15×10^-3-26×10^-3μm^2,属于低孔--特低孔—特低渗--中渗型储层。Based on the technical methods of polarizing microscope,scanning electron microscope and X-ray diffraction,the reservoir characteristics,diagenesis and pore evolution of Yingcheng Formation sandstone reservoir in Shiwu Oil Field were studied. Detailed description and analysis results show that the sandstone mainly are lithic arkose and feldspathic litharenite in type,followed by arkose. The sandstone experienced compaction,cementation,dissolution and metasomasis during the diagenesis,and then it is in the A-B phase of middle diagenesis stage.The pore throat of the sandstone belongs to medium-low size,the average porosity is mainly 8% - 10% and average permeability is 15 × 10^-3μm^2- 26 × 10^-3μm^2,which indicates the reservoirs with low-ultra low porosity and ultra low-medium permeability.

关 键 词：梨树断陷 营城组 成岩作用 成岩阶段 孔隙演化 

分 类 号：P618.130[天文地球—矿床学]