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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2010  >  32(6): 560-565
Shen Zhongmin, Jiang Min, Liu Sibing, Zhu Hongquan, Gong Yajun. PARTITION AND CONTRAST ON GENETIC TYPE OF CONTINENTAL NATURAL GAS IN THE SICHUAN BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2010, 32(6): 560-565. doi: 10.11781/sysydz201006560
Citation: Shen Zhongmin, Jiang Min, Liu Sibing, Zhu Hongquan, Gong Yajun. PARTITION AND CONTRAST ON GENETIC TYPE OF CONTINENTAL NATURAL GAS IN THE SICHUAN BASIN[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2010, 32(6): 560-565. doi: 10.11781/sysydz201006560
shu

PARTITION AND CONTRAST ON GENETIC TYPE OF CONTINENTAL NATURAL GAS IN THE SICHUAN BASIN

doi: 10.11781/sysydz201006560
  • 1.

    State Key Lab of Oil-gas Reservoirs Geology and Exploitation(Chengdu University of Technology), Chengdu, Sichuan 610059, China

  • 2. Exploration and Production Research Institute of Southwest Branch Company, SINOPEC, Chengdu, Sichuan 610081, China

  • 3. The Western New Research Center of Shengli Oilfield, SINOPEC, Dongying, Shandon 257000, China

  • Received Date: 2010-06-17
  • Rev Recd Date: 2010-10-27
  • Publish Date: 2010-12-28
    Abstract
  • The paper studies systematically the light hydrocarbon fingerprint, carbon isotope, hydrogen isotope and noble gas isotope of natural gas in the Sichuan Basin. The natural gas carbon isotope C1-C2 relationship from different areas and formations show that the natural gas in the Sichuan Basin were affected by parent types of sources rock, maturity, migration and other factors. The light hydrocarbon fingerprint indicates the major source of natural gas in the Western Sichuan Depression is humus-type, the sources in southern Sichuan Basin, eastern Sichuan Basin and the central region of Sichuan Basin are both humus-type and sapropel type, and the natural gas are mainly oil-type gas. The C1 isotope of natural gas from T3x2 in the middle area of the Western Sichuan Depression are higher than other areas and C2 isotope are less than -28‰, which shows oil-type gas and higher maturity feature. The natural gases of other formations in study area are concentrating distribution relatively and display the typical feature of coal-related gas. The marine and continental natural gas in the Sichuan Basin could be distinguished by carbon isotope δ13C2=-28‰ and hydrogen isotope δD1=-140‰ of the natural gas. The noble gas isotope shows that the natural gas are shell source without the addition of mantle noble gases.

     

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