Researches on Nitrogen Foam Flooding Technology in the Tahe Triassic Sandstone Reservoir

doi:10.11885/j.issn.1674-5086.2015.01.19.02

Abstract

Abstract: Compared with other sandstone reservoirs in China, the Tahe triassic sandstone reservoir is a block bottom water reservoir, which is characteristic of deeply buried reservoir, active bottom water, high formation temperature and high salinity(excessive calcium and magnesian ion). Therefore the number of low production and low effectiveness wells is increasing when the oil wells are flooded in the middle-later developed period. In addition, the chemical flooding to improve oil recovery does not apply due to high temperature and high salinity. Based on the researches on enhanced oil recovery technology in sandstone reservoir and the practical characteristics of bottom water sandstone reservoir of Tahe Oilfield, nitrogen foam flooding experiments were made and the feasibility was proved. Then the pilot test on field was conducted, and it showed that the nitrogen foam flooding technology is an effective method of improving oil recovery in bottom water sandstone reservoir.

Key words: Tahe Oilfield, bottom water reservoir, sandstone, high temperature and high salinity, nitrogen foam

CLC Number:

TE357.4

LIU Xueli, HU Wenge, TAN Tao, ZHANG Linyan, LIU Rui. Researches on Nitrogen Foam Flooding Technology in the Tahe Triassic Sandstone Reservoir[J]. 西南石油大学学报(自然科学版), 2016, 38(6): 105-110.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2015.01.19.02

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2016/V38/I6/105

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