An Experimental Study on Enhanced Foam Anti-gas Channeling in the Yumen H Low Permeability Fractured Reservoir

doi:10.11885/j.issn.1674-5086.2019.06.19.02

Abstract

Abstract: In a pilot test of the oxygen-poor air drive in the Yumen Oilfield, the three production wells had premature gas channeling, which caused a substantial drop in the liquid and oil production and affected normal production. The foam properties of different formulations with a salinity of 8.3×10⁴ mg/L and a temperature of 114℃, were determined with the Waring Blender method. The optimal formulation was determined:0.2%WP4 + 0.3% NS enhanced foam system. The stability at high-temperature and high-pressure, the plugging of low permeability cracks, and the EOR effect of oxygen-poor air foam injection after gas drive studied. The results show that the stability of the enhanced foam is improved under high-pressure. It can also increase the resistance of the fluid flowing in the matrix and the cracks and can control the fluidity. The resistance factor is between 5.09~38.66. Enhanced foam profile control and displacement after oxygen-poor air drive can increase the recovery efficiency of core by 16.70%~38.11%.

Key words: Yumen Oilfield, fracture reservoir, enhanced foam, profile control and displacement, anti-gas channeling

CLC Number:

TE357

HU Lingzhi, ZHAO Jinzhou, WEI Peng, ZHANG Yiwen. An Experimental Study on Enhanced Foam Anti-gas Channeling in the Yumen H Low Permeability Fractured Reservoir[J]. 西南石油大学学报(自然科学版), 2019, 41(5): 96-104.

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