Oil & Gas Geology ›› 2004, Vol. 25 ›› Issue (1): 9-13.doi: 10.11743/ogg20040102

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Physical properties and genesis of oil in Shengtuo oilfield in Jiyang depression

Zhu Guangyou1, Jin Qiang2, Zhou Jianlin3, Wang Tongshan2, Li Jian1, Zhang Linye4   

  1. 1. Petroleum Exploration and Development Research Institute of CNPC, Beijing;
    2. University of Petroleum, Dongying, Shandong;
    3. Shengli Oil Production Plant of Shengli Oilfield Company Co.Ltd, Dongying, Shandong;
    4. Geological Scientific Research Institute of Shengli Oilfield Co.Ltd, SINOPEC, Dongying, Shandong
  • Received:2004-01-06 Online:2004-02-25 Published:2012-01-16

Abstract:

Crude oil in Shengtuo oilfield in Dongying depression can be classified into heavy oil and normal light oil according to their physical properties.The former,accumulated in shallow reservoirs,are the result of secondary modification of low-maturity oil generated from the source rocks in the 4th member of Shahejie Formation;while the latter,accumulated in deep lithological and structural-lithological reservoirs, have high maturity. They can also be divided into three types according to their sulfur content.Oil with high sulfur content are distributed in shallow reservoirs and generated from source rocks deposited in salt or saline lake in the 4th member of Shahejie Formation; oil with low sulfur content are distributed in the deep 3rd member of Shahejie Formation and are generated from source rocks deposited in freshwater-brackish lake in the 3rd member of Shahejie Formation;while oil with medium sulfur content have mixed sources.Therefore, sulfur content can be used as an effective index for oil source correlation.

Key words: physical property of oil, biodegradation, genesis, heavy oil, Shengtuo oilfield

CLC Number: