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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2015  >  37(4): 512-517
Wei Zhihong, Luo Houyong, Liu Wenhui, Tenger, Wang Wangchun, Liang Mingliang, Su Long, Zhao Yidong. Application of calcium-XANES technique in solid bitumen simulation experiments under temperature and pressure[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(4): 512-517. doi: 10.11781/sysydz201504512
Citation: Wei Zhihong, Luo Houyong, Liu Wenhui, Tenger, Wang Wangchun, Liang Mingliang, Su Long, Zhao Yidong. Application of calcium-XANES technique in solid bitumen simulation experiments under temperature and pressure[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2015, 37(4): 512-517. doi: 10.11781/sysydz201504512
shu

Application of calcium-XANES technique in solid bitumen simulation experiments under temperature and pressure

doi: 10.11781/sysydz201504512
  • 1.

    Branch of Exploration Company, SINOPEC, Chengdu, Sichuan 610041, China

  • 2. Key Laboratory of Petroleum Resources Research, Chinese Academy of Sciences, Lanzhou Gansu 730000, China

  • 3. SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214151, China

  • 4. Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

  • Received Date: 2014-03-03
  • Rev Recd Date: 2015-06-01
  • Publish Date: 2015-07-28
    Abstract
  • The Lower Cambrian solid bitumen, with high organic content, high hydrogen index and low asphaltene maturity, was collected from the Kuangshanliang area in the northwestern Sichuan Basin to study the evolution of calcium speciation during TSR and pyrolysis of solid bitumen.. The generation and expulsion simulation experiments were carried out in a high temperature and pressure simulator, and the calcium speciation was determined using a direct, non-destructive synchrotron-based calcium K-edge X-ray Absorption Near Edge Structure (XANES). Calcium carbonate was the major calcium compound in the asphalt pyrolysis simulation experiments (series 1). However, in the asphalt TSR simulation experiment (series 2), with the increases of temperature and pressure, the yield of H2S and sulfate increased, indicating that both oxidation and reduction reactions occurred. The generation and enrichment of calcium sulfate in the simulation experiments of series 2 indicated that the acidic fluid from the TSR process could produce significant dissolution in dolomite reservoirs.

     

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