Effects of Lean Zones on Steam-Assisted Gravity Drainage Performance
AbstractA thorough understanding of the effects of lean zones and the improvement of steam-assisted gravity drainage (SAGD) operations with such heterogeneities is critically important for reducing the disadvantages of lean zones. The numerical model shows: (1) SAGD is most influenced by the single-layer lean zone with the above-injector (AI) location; with the decrease of interval distance and increase of thickness and water saturation in lean zones, the detrimental effect of single-layer lean zones on SAGD performance increases; (2) with the increase of period and decrease of connate and initial water saturations in lean zones, the detrimental effect of multiple-layer lean zones on SAGD performance increases; (3) reducing the injection pressure properly improves SAGD performance in leaky oil sands. The field-scale study indicates: (1) well pair 1 is most affected by lean zones in the studied pad due to the widest distribution of lean zones above its injector, and a hybrid cyclic steam stimulation (CSS)/SAGD method is proposed to overcome the practical problem of a low injection pressure in this area; (2) simulation results prove that the hybrid CSS/SAGD method is better than the conventional SAGD method in leaky oil sands. View Full-Text
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Xu, J.; Chen, Z.; Dong, X.; Zhou, W. Effects of Lean Zones on Steam-Assisted Gravity Drainage Performance. Energies 2017, 10, 471.
Xu J, Chen Z, Dong X, Zhou W. Effects of Lean Zones on Steam-Assisted Gravity Drainage Performance. Energies. 2017; 10(4):471.Chicago/Turabian Style
Xu, Jinze; Chen, Zhangxin; Dong, Xiaohu; Zhou, Wei. 2017. "Effects of Lean Zones on Steam-Assisted Gravity Drainage Performance." Energies 10, no. 4: 471.
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