Geochemistry and Accumulation Characteristics of Es4 Mixed Oils in the South Slope of Dongying Sag
详细信息
- 责任者：Chang Xiangchun (Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals ; Qingdao 266510 ; China) ; Han Zuozhen
- 刊名：Journal of Jilin University
- 出版年：2012
- 卷期：42(3)
- 关键词：油藏地球化学 ; reservoir geochemistry ; 成藏模式 ; pool-formed model ; 东营凹陷 ; Dongying Sag
- 页码：p.672-680
- 图表：4 illus., 1 table, 15 refs.
- 分类号：1003
- issnNo：ISSN1671-5888
- isbnNo：CN22-1343/P
摘要
The south slope of Dongying sag is a favorable petroleum exploration target.The research results indicate that Es4 oils show typical characteristics of mixed oils.The source inputs contain dual contributions of aquatic lives and high plants,thermal maturities are varied from low mature to mature,sedimentary environments are mainly reduction with different intensities,and part samples show characteristics of mixed oil charging before and after biodegraded.According to the geochemical correlation,for the east part of south slope with Niuzhuang sag as source kitchen,Le’an and Wangjiagang oil fields are Es4-sourced oils mixed with few Es3-sourced.For the middle part with Niuzhuang and Lijin sag as source kitchens,Liangjialou oilfield is Es3-sourced oils mixed with few Es4-sourced,while Chunhua oilfield is reversed.For the west part with Boxing sag as source kitchen,Zhenglizhuang and Gaoqing oilfields are Es4-sourced oils mixed with few Es3-sourced,while Jinjia oilfield is Es3-sourced.Mature oils generated from Es4-Es3 in the subsag center are mixed by the low mature oils generated from Es4 in the slope,migrated along faults and unconformities,and accumulated on the high parts of the south slope.
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