Advances in Earth Science ›› 2003, Vol. 18 ›› Issue (4): 515-520. doi: 10.11867/j.issn.1001-8166.2003.04.0515

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A RESEARCH ON THE INORGANIC CARBON DIOXIDE FROM ROCK BY THERMAL SIMULATION EXPERIMENTS

Wang Xuejun   

  1. 1.The Geoscience Department of Zhejiang University,Hangzhou 310027,China;
    2.The Geoscience Institute of Shengli Oil Field Ltd. Co.,SINOPEC,Dongying 257015,China
  • Received:2002-03-25 Revised:2003-01-07 Online:2003-12-20 Published:2003-08-01

Wang Xuejun. A RESEARCH ON THE INORGANIC CARBON DIOXIDE FROM ROCK BY THERMAL SIMULATION EXPERIMENTS[J]. Advances in Earth Science, 2003, 18(4): 515-520.

Combining with the geological characteristics of Sanshui basin, the author analyses the possibility to do thermal simulation experiments of inorganic carbon dioxide, has done many experiments under different conditions and relative determinations, gives the concepts of yield quantity and conversion rate of inorganic carbon dioxide in sedimentary rocks and works out the method to calculate them . The experimental results show: the sedimentary rocks that contain carbonate minerals can convert into a number of inorganic carbon dioxide, the higher the conversion rate of inorganic carbon dioxide is, the easier the carbonate minerals in the sedimentary rock convert. Under the same thermal maturity, the quantity of organic carbon dioxide yielded in kerogen of style Ⅱ is smaller than that yielded in kerogen of style Ⅲ. There is a close relation between the carbon isotope and origin of carbon dioxide. Along with the increase of thermal maturity of organic matter, the 13C is getting more and more in organic carbon dioxide yielded by the same style organic matter. The 13C in inorganic carbon dioxide is enriched obviously than that in organic carbon dioxide. The 13C in inorganic carbon dioxide is enriched as the pH of water added in the experiment decreases and the content of inorganic carbon dioxide in the yielded gas, the experimental temperature and time increase. All these experimental results give proofs of simulation experiments for the research on the origin of carbon dioxide and its resources evaluation.

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