中国石油大学学报（自然科学版）2012，Vol.36Issue(3)：38-43,6.DOI:10.3969/j.issn.1673-5005.2012.03.007
马朗凹陷芦草沟组页岩油储层成岩演化与溶蚀孔隙形成机制
Diagenetic evolution and formation mechanism of dissolved pore of shale oil reservoirs of Lucaogou formation in Malang sag
摘要
Abstract
Based on the analysis of field emission ESEM, X-ray diffraction, the characteristics of diagenetic evolution and the formation mechanism of dissolved pores of Lucaogou formation shale oil reservoir in Malang sag were systematically researched. The results show that Permian Lucaogou formation shale oil reservoir is characterized by low porosity and ultralow-permeability. The reservoir mainly experienced compaction, dissolution, cementation and metasomatism. Organic matter and inorganic mineral diagenetic evolution are corresponding at space and time, because peak period of hydrocarbon-generating, high porosity and high illite content occur at the same depth. The acid fluid generated by hydrocarbon formation can dissolve unstable minerals and therefore form dissolved pores, which provides K+ for illitization at the same time. Dissolved pores and organic-matter pores are the major storage spaces of shale oil. Illitization accelerates the dissolution of potassium feldspar and causes mineral volume contraction, which obviously promotes the formation of secondary pores. The progress of the formation of dissolved pores is synchronized with hydrocarbon generation and the primary migration of oil.关键词
页岩油/储层/成岩演化/溶蚀孔隙/形成机制/马朗凹陷Key words
shale oil/ reservoirs/ diagenetic evolution/ dissolved pores/ formation mechanism/ Malang sag分类
能源科技引用本文复制引用
吴林钢,李秀生,郭小波,罗权生,刘晓健,陈旋,姜振学..马朗凹陷芦草沟组页岩油储层成岩演化与溶蚀孔隙形成机制[J].中国石油大学学报（自然科学版）,2012,36(3):38-43,6.基金项目
国家"973"重点基础研究发展规划项目(2011CB201105) （2011CB201105）
