石油勘探与开发2017，Vol.44Issue(1)：12-20,9.DOI:10.11698/PED.2017.01.02
陆相致密油形成地质条件及富集主控因素——以鄂尔多斯盆地三叠系延长组7段为例
Geological conditions for continental tight oil formation and the main controlling factors for the enrichment: A case of Chang 7 Member, Triassic Yanchang Formation, Ordos Basin, NW China
摘要
Abstract
The Chang7 Member of the Triassic Yanchang Formation in the Ordos Basin is a typical continental tight oil province.The geological conditions and the main controlling factors for the formation of tight oil province in Chang 7 Member were studied based on extensive core analysis data,laboratory simulation tests and practical work of tight oil exploration and development in the basin.The tight oil in the Chang 7 Member is characterized by wide distribution,excellent source rock conditions,tight sandstone reservoirs,complicated pore-throat structure,poor physical properties,high oil saturation,high quality oil,and low pressure coefficient.During the depositional period of Chang7 Member,the bottom shape of the basin was steep at southwest and gentle at northeast,the tectonic movements were active,favorable for the deposition of source rock and reservoir;the widespread high quality source rock can provide sufficient oil supply for the large tight oil province;the large scale sand bodies provide good reservoir condition for the large tight oil province;the abundant structural fractures in the tight reservoir act as pathways for tight oil migration;and the stable deposition and tectonic evolution of the basin provide good preservation conditions for the tight oil province.The main controlling factors of Chang7 Member tight oil enrichment are as follows:(1) good configuration of source rock and reservoir and constant charging are the key to the formation of the tight oil province;(2) abundant micro-scale pores are the premise of tight oil enrichment;(3) strong and sustained charging guarantees the enrichment and high yield of oil in the tight reservoirs.关键词
三叠系/延长组/致密油/富集主控因素/源储配置/生烃增压/持续充注/鄂尔多斯盆地Key words
Triassic/Yanchang Formation/tight oil/oil enrichment controlling factors/source rock and reservoir configuration/hydrocarbon-generating overpressure/sustained charge/Ordos Basin分类
能源科技引用本文复制引用
杨华,梁晓伟,牛小兵,冯胜斌,尤源..陆相致密油形成地质条件及富集主控因素——以鄂尔多斯盆地三叠系延长组7段为例[J].石油勘探与开发,2017,44(1):12-20,9.基金项目
国家自然科学基金重大项目(41390451) （41390451）
国家重点基础研究发展计划(973)项目(2014CB239003) （973）
“十三五”国家油气重大专项(2016ZX05046) （2016ZX05046）
