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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2017  >  39(4): 527-534
Zhang Hongan, Zhang Shuang, Zhang Yunxian, Yao Suping. Simulation of hydrocarbon generation of the Paleozoic coals in the Dongpu Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(4): 527-534. doi: 10.11781/sysydz201704527
Citation: Zhang Hongan, Zhang Shuang, Zhang Yunxian, Yao Suping. Simulation of hydrocarbon generation of the Paleozoic coals in the Dongpu Sag, Bohai Bay Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2017, 39(4): 527-534. doi: 10.11781/sysydz201704527
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Simulation of hydrocarbon generation of the Paleozoic coals in the Dongpu Sag, Bohai Bay Basin

doi: 10.11781/sysydz201704527
  • 1.

    SINOPEC Zhongyuan Oil Field, Puyang, Henan 457001, China

  • 2. School of Earth Sciences and Engineering, Nanjing University, Nanjing, Jiangsu 210046, China

  • Received Date: 2017-05-15
  • Rev Recd Date: 2017-06-20
  • Publish Date: 2017-07-28
    Abstract
  • The hydrocarbon generation and expulsion characteristics under different temperatures and pressures and the hydrocarbon potential of coals were studied based on the thermal simulation with water in a half-open system of coals using the geological conditions of the Carboniferous-Permian coals in the Dongpu Sag, Bohai Bay Basin. The results indicate that: (1) The Carboniferous-Permian coals in the Dongpu Sag show a very high hydrocarbon generation potential. The yield of hydrocarbon generated can reach 254 mg/g, among which the gaseous products account for 220 mL/g, and the liquid part about 145.8 mg/g. (2) The yield of thermal cracking oil from coal shows a single peak, which appears at 325 ℃ (Ro=1.08%). Almost 40% of the liquid hydrocarbon was expelled from coal. (3) The hydrocarbon generation of coal followed an increasing tendency in several stages. The intervals 325-400 ℃ and 500-550 ℃ are the stages when gaseous hydrocarbon shows a rapid increase. The former increase should be a result of thermal cracking of liquid hydrocarbon, while the latter maybe caused by the condensation of aromatic hydrocarbon. (4) The Carboniferous-Permian coals in the Dongpu Sag yielded both oil and gas, with an oil generation potential appro-ximately equal to that of the Jurassic coals in the Turpan-Harmi Basin, and a gas generation potential matching the Carboniferous-Permian coals in the Ordos Basin.

     

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