西南石油大学学报(自然科学版)

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Hydrocarbon Source Evaluation and Oil Source Contrast of the#br# Yanchang Formation in Fu-Huang Exploration Area,Ordos Basin

TANG Jianyun1,2*, SHI Zheng3, SONG Hongxia4, ZHANG Lin1,2, CHEN Yubao5   

  1. 1. Department of Petroleum Engineering of Karamay Vocational and Technical College,Karamay,Xinjiang 834000,China
    2. Petroleum Institute,Karamay Campus,China University of Petroleum(Beijing),Karamay Xinjiang 834000,China
    3. Wuxi Institute of Petroleum Geology,SINOPEC,Wuxi,Jiangsu 214126,China
    4. The Institute of Exploration and Development of Tuha Oilfield,PetroChina,Hami,Xinjiang 839009,China
    5. Yanchang Petroleum Co. Ltd.,Yan′ an,Shaanxi 716005,China
  • Online:2016-06-01 Published:2016-06-01

Abstract:

To evaluate the hydrocarbon potential and to establish oil source of oil-bearing series in exploration area,we studied
the hydrocarbon source rock and the crude oil by means of organic petrology and geochemistry. The results show that the
Chang 7 hydrocarbon source rocks are highly abundant in organic matter,and the organic matter is type I II1 of high maturity,
and is good hydrocarbon source rock;the major organic matter type of Chang 6 hydrocarbon source rock is type III II2,
with type I II2 at a minor scale,and is medium-good hydrocarbon source rock with organic matter maturity high maturity;
the Chang4+5 hydrocarbon source rock is of medium high organic matter abundance,mainly with type III,and type II2 at
a minor scale,and is non-poor source rocks organic matter with low-maturity maturity. Crude oil properties of Chang 4+5
and Chang 6 hydrocarbon source rocks are all medium mature oil depositing in continental freshwater lake. Chang4+5,Chang
6 and Chang 7 hydrocarbon source rocks all contribute to the reservoir,among which the Chang 7 hydrocarbon source rocks
contribute the mostand the dark mudstone of Chang4+5 contribute less. The Chang 7 hydrocarbon source rocks found in the
study area expanded the distribution of hydrocarbon source rocks in Ordos Basin,and is of great significance for guiding
thefuther exploration of oilfield.

Key words: Yanchang Formation, hydrocarbon source rock, oil source correlation, Fu-Huang exploration area, Ordos Basin

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