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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2017  >  39(3): 397-401
Gao Gang, Yang Shangru, Chen Guo, Hu Dandan, Zhao Ke. Method and application for identifying TOC threshold of hydrocarbon-expelling source rocks[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(3): 397-401. doi: 10.11781/sysydz201703397
Citation: Gao Gang, Yang Shangru, Chen Guo, Hu Dandan, Zhao Ke. Method and application for identifying TOC threshold of hydrocarbon-expelling source rocks[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(3): 397-401. doi: 10.11781/sysydz201703397
shu

Method and application for identifying TOC threshold of hydrocarbon-expelling source rocks

doi: 10.11781/sysydz201703397
  • 1.

    State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China

  • 2. Qingxi Operational Zone of Yumen Oilfield Company, CNPC, Yumen, Gansu 735200, China

  • 3. Geophysical Exploration Research Institute of Huabei Oilfield Company, CNPC, Renqiu, Hebei 062552, China

  • Received Date: 2016-02-14
  • Rev Recd Date: 2017-04-24
  • Publish Date: 2017-05-28
    Abstract
  • Considering the fact that hydrocarbon-expelling source rocks are difficult to identify in oil and gas geology, a method to distinguish hydrocarbon-expelling source rocks was proposed using the conventional TOC and pyrolysis analysis parameters (Rock-Eval). This method is used to identify the TOC threshold, based on hydrocarbon-generation amount parameters [IHC=S1/w(TOC)] and [w(A)/w(TOC)]. Only when TOC content is higher than the threshold, can the source rock be regarded as hydrocarbon-expelling source rock. This method was applied to the source rocks in the Permian Lucaogou Formation in the Junggar and Santanghu basins, the Cretaceous Xiagou Formation in the Ying'er and Qingxi sags in the Jiuquan Basin, and the Upper Triassic Yanchang Formation Chang-7 member in the Ordos Basin. The discriminant results are useful, but it requires source rocks with similar organic matter type and maturity. The parameters represent liquid hydrocarbon amount. Gaseous hydrocarbons are lost easily, and as a result, the method is more effective for oil source rock.

     

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