致密砂岩储层埋藏-成岩-油气充注演化过程与孔隙演化定量分析——以鄂尔多斯盆地东部上古生界盒8段天然气储层为例

doi:10.11743/ogg20160610

石油与天然气地质 ›› 2016, Vol. 37 ›› Issue (6): 882-892.doi: 10.11743/ogg20160610

致密砂岩储层埋藏-成岩-油气充注演化过程与孔隙演化定量分析——以鄂尔多斯盆地东部上古生界盒8段天然气储层为例

李杪¹, 侯云东², 罗静兰¹, 陈娟萍², 罗晓容³, 贾亚妮²

1. 西北大学地质系大陆动力学国家重点实验室, 陕西西安 710069;
2. 中国石油长庆油田分公司勘探开发研究院, 陕西西安 710021;
3. 中国科学院油气资源研究重点实验室/中国科学院地质与地球物理研究所, 北京 100029

收稿日期:2016-11-02 修回日期:2016-11-07 出版日期:2016-12-08 发布日期:2017-01-02
通讯作者: 罗静兰(1957-),女,教授,沉积学、成岩作用。E-mail:jlluo@nuw.edu.cn。 E-mail:jlluo@nuw.edu.cn
作者简介:李杪(1985-),女,博士研究生,沉积学、石油地质学。E-mail:174427283@qq.com。
基金资助:
国家自然科学基金项目（41272138；41572128）；国家科技重大专项（2011ZX05008-004-061；2016ZX05008-004-032）。

Burial,diagenesis, hydrocarbon charging evolution process and quantitative analysis of porosity evolution: A case study from He 8 tight sand gas reservoir of the Upper Paleozoic in Eastern Ordos Basin

Li Miao¹, Hou Yundong², Luo Jinglan¹, Chen Juanping², Luo Xiaorong³, Jia Yani²

1. State Key Laboratory of Continental Dynamics, Northwest University, Xi'an, Shaanxi 710069, China;
2. Research Institute of Exploration and Development, Changqing Oil Field Company, PetroChina, Xi'an Shaanxi 710021, China;
3. Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China

Received:2016-11-02 Revised:2016-11-07 Online:2016-12-08 Published:2017-01-02

摘要/Abstract

摘要： 目前国内对致密砂岩的成岩-孔隙演化过程、埋藏-热演化史、油气充注史基本停留在相对独立和单一的静态研究阶段，因此，对于砂岩的岩石学组分及其差异性成岩演化过程导致的储层致密化过程与油气充注时序关系的研究依然十分薄弱。通过各类薄片显微镜下研究与定量统计，结合扫描电镜、阴极发光、包裹体均一温度与激光拉曼探针成分等多种分析测试手段，开展了鄂尔多斯盆地东部上古生界盒8段不同类型致密砂岩的埋藏-成岩-油气充注-孔隙动态演化历史的精细研究，在此基础上讨论了各砂岩致密化过程与油气充注在时序关系上的差异性。研究结果显示，钙质胶结砂岩和高塑性岩屑砂岩的成岩-油气充注演化过程相对简单，前者经历中成岩阶段A期碳酸盐胶结作用后基本成为致密储层，时序关系为先充注后致密；而后者经历早成岩阶段压实作用后一部分成为致密储层，时序关系为先致密后充注；石英砂岩和岩屑石英砂岩经历了较为复杂的成岩-油气充注演化过程，时序关系为边充注边致密。

关键词: 砂岩类型, 成岩序列, 孔隙定量演化, 致密砂岩, 鄂尔多斯盆地

Abstract: Current researches about the evolution process of diagenesis-porosity,the burial-thermal history,and the hydrocarbon charging history of tight sandstone reservoirs are still in a static stage in China.Apparently,less attention has been paid to the relevance between hydrocarbon charging and tightening process caused by the petrological components of sandstones and its differential diagenetic evolution process.In order to better understanding the dynamic evolution history of burial-diagenesis-hydrocarbon charging-porosity of tight sandstone,samples from the 8^th Member of Xiashihezi Formation (He8) of the Upper Paleozoic in eastern Ordos Basin were studied in detail through the identification and quantitative statistics of cast sections,together with various analysis methods such as SEM,CL,homogenization temperature and chemical composition of fluid inclusions etc.Furthermore,the differences of the timing of densification process and hydrocarbon charging among different sandstone layers were discussed.The results indicate that the diagenesis-hydrocarbon charging evolution processes of both the calcium-cemented sandstone and high plastic lithic sandstone are relatively simple.The former became tightened after carbonate cementation in the stage A of middle diagenesis phase,which confirms that hydrocarbon charging was early than tightening; while the latter became tightened after compaction in the early diagenetic stage,which confirms that tightening occurred before hydrocarbon charging.In contrast,the quartz sandstone and lithic quartz sandstone are complicated in diagenetic-charging evolution process and their tighenging and hydrocarbon charging synchronous.

Key words: sandstone type, diagenetic sequence, quantitative porosity evolution, tight sandstone, Ordos Basin

中图分类号:

TE122.1

李杪,侯云东,罗静兰,等. 致密砂岩储层埋藏-成岩-油气充注演化过程与孔隙演化定量分析——以鄂尔多斯盆地东部上古生界盒8段天然气储层为例[J]. 石油与天然气地质, 2016, 37(6): 882-892. doi: 10.11743/ogg20160610 Li Miao,Hou Yundong,Luo Jinglan,et al. Burial,diagenesis, hydrocarbon charging evolution process and quantitative analysis of porosity evolution: A case study from He 8 tight sand gas reservoir of the Upper Paleozoic in Eastern Ordos Basin[J]. Oil & Gas Geology, 2016, 37(6): 882-892. doi: 10.11743/ogg20160610

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致密砂岩储层埋藏-成岩-油气充注演化过程与孔隙演化定量分析——以鄂尔多斯盆地东部上古生界盒8段天然气储层为例

Burial,diagenesis, hydrocarbon charging evolution process and quantitative analysis of porosity evolution: A case study from He 8 tight sand gas reservoir of the Upper Paleozoic in Eastern Ordos Basin

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