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Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2013  >  35(1): 111-114
Han Xuehui, Yang Long, Wang Hongliang, Wang Xueliang, Fang Tao, Zhang Juanjuan. A practical core cleaning method based on CO2 dissolved gas drive[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(1): 111-114. doi: 10.11781/sysydz201301111
Citation: Han Xuehui, Yang Long, Wang Hongliang, Wang Xueliang, Fang Tao, Zhang Juanjuan. A practical core cleaning method based on CO2 dissolved gas drive[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2013, 35(1): 111-114. doi: 10.11781/sysydz201301111
shu

A practical core cleaning method based on CO2 dissolved gas drive

doi: 10.11781/sysydz201301111
  • 1.

    School of Geosciences, China University of Petroleum, Qingdao, Shandong 266555, China

  • 2. Research Institute of Experiment and Detection, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China

  • 3. Well Logging Company, Western Drilling Engineering Corporation of, PetroChina, Karamayi, Xinjiang 834000, China

  • Received Date: 2012-02-14
  • Rev Recd Date: 2012-11-23
  • Publish Date: 2013-01-28
    Abstract
  • In order to improve the efficiency of core cleaning, a practical core cleaning method based on CO2 dissolved gas drive was developed. The method added vacuum-pumping, CO2 pre-cleaning and solvent recovery to the method designed by Stewart in 1952. Then, the effect of core cleaning was observed through a series of experiment with the employment of DGO-1 type CO2 dissolved gas drive core cleaning device which was self-made. The results of core cleaning of 6 rocks with different porosities and permeabilities showed that the fluorescence level was less than 3 and the porosity and permeability were steady after 6-10 circles. The effect met the standard SY/T 5336-2006. The period of core cleaning with the employment of the new method was 2-3 days, which was less than that of Soxhlet extraction device (2-3 weeks or longer). Since the method had the characteristics of clear principle, simple device, good operability, high efficiency and was environmental-friendly, it was recommended to popularize in rock physics lab.

     

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