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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2017  >  39(3): 417-422
Zhang Jun. Maturity determination of hydrocarbon source rocks in Xihu Sag: Evidence from fluorescence alteration of multiple macerals[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(3): 417-422. doi: 10.11781/sysydz201703417
Citation: Zhang Jun. Maturity determination of hydrocarbon source rocks in Xihu Sag: Evidence from fluorescence alteration of multiple macerals[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(3): 417-422. doi: 10.11781/sysydz201703417
shu

Maturity determination of hydrocarbon source rocks in Xihu Sag: Evidence from fluorescence alteration of multiple macerals

doi: 10.11781/sysydz201703417

  • Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China

  • Received Date: 2016-09-14
  • Rev Recd Date: 2017-04-28
  • Publish Date: 2017-05-28
    Abstract
  • Vitrinite reflectance is one of the main indexes to determine the thermal maturity of hydrocarbon source rocks. Previous results indicated that vitrinite reflectance (Ro) is not only controlled by thermal maturity, but also affected by the type of organic matter of source rock. The hydrogen content of vitrinite controls the level of vitrinite reflectance suppression and influences Ro accuracy. The fluorescence alteration of multiple macerals (FAMM) can solve vitrinite reflectance suppression effectively. The thermal maturity of 10 source rock samples from the Pinghu Formation in the Xihu Sag of East China Sea Basin were analyzed by means of FAMM and vitrinite reflectance. Results showed that the vitrinite reflectance of hydrocarbon source rocks from the Pinghu Formation were suppressed to some degree and the suppression corrected value varies from 0.01% to 0.25%. For well TWT1 the present thermal maturity of source rocks from the Pinghu Formation was determined as 0.90%-1.41%Ro by FAMM, but 0.77%-1.21%Ro by vitrinite reflectance analyses. The study helps evaluate hydrocarbon potential in the Pinghu Formation.

     

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