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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2017  >  39(3): 383-389
Ge Haixia, Zhang Zhihuan, Min Wei. Geochemical characteristics and oil-source correlation of Paleogene oils in Qingdong Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(3): 383-389. doi: 10.11781/sysydz201703383
Citation: Ge Haixia, Zhang Zhihuan, Min Wei. Geochemical characteristics and oil-source correlation of Paleogene oils in Qingdong Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(3): 383-389. doi: 10.11781/sysydz201703383
shu

Geochemical characteristics and oil-source correlation of Paleogene oils in Qingdong Sag, Bohai Bay Basin

doi: 10.11781/sysydz201703383
  • 1.

    State Key Laboratory of Petroleum Resource and Prospecting, School of Geosciences, China University of Petroleum, Beijing 102249, China

  • 2. Petroleum Development Institute of SINOPEC Shengli Oilfield Company, Dongying, Shandong 257015, China

  • Received Date: 2016-12-21
  • Rev Recd Date: 2017-04-05
  • Publish Date: 2017-05-28
    Abstract
  • Biodegraded oils have been discovered in the Qingdong Sag, Jiyang Depression, Bohai Bay Basin. On the basis of the geochemical characteristics of source rocks and crude oils, the less affected C29 hopane, is chosen to calculate biomarker parameters, including β-carotane/(2×C29hopanes), gammacerane/(2×C29hopanes). The tricyclic terpane parameters (2×C24tetracyclic terpane)/(C26 tricyclic terpanes), (2×C19)/(C28+C29) tricyclic terpanes and chrysene/phenanthrene, combined with 4-methylsteranes and carbon isotopes. Crude oils in the Qingdong Sag were divided into 4 types (Ⅰ, Ⅱ, Ⅲ, Ⅳ), while source rocks were divided into 3 types (A, B1, B2). Crude oils of type I derived from mature source rocks (type A) in the lower part of the third member of Shahejie Formation in the northern part of the sag. Crude oils of type Ⅱ were sourced from rocks (type B2) in the upper part of the fourth member of Shahejie Formation in the southern part of the sag. Crude oils of type Ⅲ were derived from type B1 source rocks in the upper part of the fourth member of Shahejie Formation in the central and northern parts of the sag. Crude oils of type Ⅳ were sourced from rocks in the upper part of the fourth member of Shahejie Formation in the Qingnan Sag. Oils in well QD-8 partially originated from source rocks in the southern part of the Qingdong Sag.

     

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