Hydrocarbon Filling Mechanism and Accumulation Model in Low-uplift Zone: Taking Linfanjia Low-uplift Zone of Jiyang Depression as an Example(PDF)
《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]
- Issue:
- 2015年第04期
- Page:
- 35-43
- Research Field:
- 基础地质与矿产地质
- Publishing date:
Info
- Title:
- Hydrocarbon Filling Mechanism and Accumulation Model in Low-uplift Zone: Taking Linfanjia Low-uplift Zone of Jiyang Depression as an Example
- Author(s):
- JIANG You-lu; CUI Xiao-jun; JIA Guang-hua; FAN Jie; LI Hong-lin
- 1. School of Geosciences, China University of Petroleum, Qingdao 266580, Shandong, China; 2. Geological Research Institute, Shengli Oilfield Company, SINOPEC, Dongying 257015, Shandong, China
- Keywords:
- hydrocarbon accumulation; filling mechanism; migration-accumulation model; faulted basin; low-uplift zone; fault transport; Jiyang depression; Bohai Bay Basin
- PACS:
- P618.13;TE122.1
- DOI:
- -
- Abstract:
- The low uplift zone in faulted basin is far away from oil source, and the oil-bearing layers are quite shallow. The study on hydrocarbon filling mechanism and migration-accumulation model in faulted basin is very weak. Taking Linfanjia low-uplift zone in Jiyang depression as an example, the relationships between reservoir-forming dynamic and resistance were analyzed, and the hydrocarbon filling feature and migration-accumulaiton model of low-uplift zone were discussed. The results show that the crude oil in Linfanjia low-uplift zone has the characteristics of high gammacerane/C30 hopane and low ratio of pristane to phytane (Pr/Ph), which is quite similar to that of source rocks of the upper sub-member of the fourth member of Shahejie Formation in Lijin depression. What is more, according to the analysis of the geological setting of reservoir, based on the results calculated by reservoir-forming dynamic and resistance, the hydrocarbon filling model in Linfanjia low-uplift zone is “fault double transport-multi-layer filling-unconformity filter”. In addition, considering the differences of transporting mode and capacity between activity and stationary periods, combined with hydrocarbon occurrence and trap development, the accumulation modes in Linfanjia low-uplift zone can be summarized as “fault vertical transport-lithology controlled trap”, “fault lateral transport-‘clearstory’ open-lithology controlled trap”, “fault lateral transport-uncomformity screen” and “fault lateral transport-lithology controlled trap”.
Last Update: 2015-07-20