高邮凹陷南坡真武-曹庄地区戴南组砂岩成岩作用及其对储层性质的影响  

Diagenesis and Its Effect on Dainan Sandstone Reservoir in Zhenwu-Caozhuang Region of Southern Slope of Gaoyou Depression

作　　者：李德勇[1,2] 张金亮[3] 姜效典[1,2] 江志强 

机构地区：[1]中国海洋大学海洋地球科学学院,山东青岛266100 [2]海底科学与探测技术教育部重点实验室,山东青岛266100 [3]北京师范大学资源学院,北京100875 [4]中海石油(中国)有限公司上海分公司,上海200030

出　　处：《地球科学（中国地质大学学报）》2013年第1期130-142,共13页Earth Science-Journal of China University of Geosciences

基　　金：国家科技支撑计划(No.2006BAC18B05);山东省自然科学基金(No.2009ZRB02103)

摘　　要：在详细岩心观察描述的基础上,利用铸体薄片、扫描电镜、压汞分析、X-射线衍射、埋藏史-热史模拟等多种分析测试手段,对戴南组砂岩成岩作用特征进行了详细研究,发现砂岩储层主要经历了压实、胶结、溶蚀和交代作用,自生胶结物主要有高岭石等粘土矿物、铁碳酸盐、石英、长石及硬石膏等,发生溶蚀则主要为长石和岩屑,戴南组地层现今主要处于晚成岩的A期.戴南组砂岩储层主要受压实作用、高岭石胶结、铁碳酸盐胶结、石英次生加大及溶蚀作用的影响,发育塑性组分溶蚀成岩相和高岭石充填成岩相的储层性质往往较好,是有利的油气储集带;而发育压实-充填成岩相和碳酸盐胶结成岩相的储层孔渗性能很差,多为致密储层.Determination of the effects of diagenesis on Dainan sandstone reservoir in Zhenwu-Caozhuang region can facilitate the prediction of the beneficial oil reservoir. Based on core observation, the diagenetic characteristics of Dainan reservoir has been studied in detail by using case thin section, SEM, mercury penetration, X-ray and buried-thermal history modeling. Dainan sandstone has experienced such processes as the compaction, cementation, dissolution and metasomatism. Authigenetic cement includes clay mineral, ferrum carbonate, quartz, feldspar and anhydrite. Feldspar and fragment have mainly suffered dissolution. Dainan Formation is in the period A of mesodiagenesis. Dainan reservoir quality is mainly controlled by compaction, kaolinite cementation, ferrum carbonate cementation, overgrowth quartz and dissolution. Sandstone reservoirs in which dissolution or kaolinite infill diagenentic lithofacies develop commonly have higher porosity and permeability, while reservoirs developing compact-filling or carbonate cementation diagenentic lithofacies usually have poor physical property.

关 键 词：成岩作用 储层性质 成岩相 高邮凹陷 石油地质 

分 类 号：P624[天文地球—地质矿产勘探]