白家海凸起—阜北斜坡中下侏罗统成岩演化特征  

Diagenetic Evolution of Middle-Lower Jurassic in Baijiahai Swell-Fubei Slope in Junggar Basin

作　　者：况昊[1,2] 王振奇[1,2] 瞿建华[3] 柳妮[1,2] 徐依[2] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室,湖北荆州434023 [2]长江大学地球科学学院,湖北荆州434023 [3]中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依834000

出　　处：《新疆石油地质》2012年第2期159-161,共3页Xinjiang Petroleum Geology

摘　　要：通过岩心、薄片、扫描电镜和X衍射等资料,对白家海凸起—阜北斜坡侏罗系的岩石特征、成岩作用类型、成岩作用序列和孔隙演化特征等进行了研究。结果表明:白家海凸起—阜北斜坡中下侏罗统岩石碎屑成分以石英、长石为主,颗粒间以凸凹接触和缝合线接触为主,具有较低的结构成熟度和成分成熟度;主要处于成岩阶段的中成岩期A亚期;随着成岩演化,经过机械压实、黏土环边胶结和石英长石次生加大胶结、方解石(浊沸石)胶结等作用,使储集层原始孔隙度从35%～38%降低至3%～5%,而溶蚀作用使孔隙度有一定提高。Based on the data of core,thin section,scanning electron microscope（SEM） and X-ray diffraction analyses,the characteristics of petrology,diagenesis type and sequence as well as porosity evolution of the Jurassic in Baijiahai swell-Fubei slope are studied.The results indicate that the debris components of the Mid-Lower Jurassic in this area are mainly quartz and feldspar with their grains in the manner of concave-convex and stylolite contact,and low textural and compositional maturity.The diagenetic stage is dominated by mid-period A sub-period.With the diagenetic evolution of mechanical compaction,clay rim cementation,quartz-feldspar secondary enlargement and cementation and calcite（laumontite）,the original porosity of reservoir is reduced from 35%～38% to 3%～5%,but dissolution in them allows the porosity to increase to some extent.

关 键 词：白家海凸起 阜北斜坡 成岩序列 孔隙演化 侏罗系 

分 类 号：TE112.23[石油与天然气工程—油气勘探]