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Your Position :Home->Past Journals Catalog->2016 Vol.3

Formulation Design and Performance Evaluation of Steam Channeling Control System in the Process of Steam Huff and Puff
Author of the article:Wu Fengdou, Wang Jian, Feng Tian, Yu Heng, Qin Shan
Author's Workplace:State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation, Southwest Petroleum University
Key Words:Heavy oil; Steam huff and puff; High temperature; Crossflow; Foam
Abstract:


Due to the severe interlayer heterogeneity of steam operation area in Xinjiang Fengcheng oilfield, there is a serious phenomenon of steam channeling in the process of steam huff and puff which decreases the utilization efficiency of heat and development effect of thermal recovery. Thus it is necessary to carry out the formulation design and performance evaluation on steam channeling control system in order to guarantee the improvement of steam entry profile and sweep efficiency. Aiming at channeling control of injected steam, N2 was used as foaming gas, indoor study optimized formula at 320°C :foaming agent (FA2, 0.1%) + foaming agent (FA4, 0.5%) + foaming stabilizer ( FS3, 0.05% ) + assistant ( AS-1, 0.1 % ) , mass concentration. The results show that foam volume is 605mL per 100mL foaming solution, foam half-life time is 135 minutes, foam quality is 83.5%, surface tension is 0.43mN/m. Through the evaluation test on salt- resistance and oil-resistance, the results show that the formulation has good adaptability to the change of mineralization, and there is no obvious adverse impact on foam system in the cases of low oil saturation (steam channeling zone), so the formulation is capable of maintaining percolation resistance which effectively stops high permeability layers from steam channeling.

 


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