通过多孔介质中泡沫驱油的渗流数学模型,编制泡沫驱数值模拟软件。该软件可以反映泡沫渗流时涉及的生成、破灭及运移机制。以埕东油田西区泡沫驱油先导实验区为原型,分析数值模拟模型各网格泡沫生成速度、自然破灭速度和遇油破灭速度分布与影响因素的统计规律。结果表明,泡沫生成速度随平均渗透率、含气饱和度、气相中泡沫摩尔分数的增大而增大,随含油饱和度的增大而减小;泡沫自然破灭速度随平均渗透率、含气饱和度、含油饱和度和气相中泡沫摩尔分数的增大而增大;泡沫遇油破灭速度随含油饱和度、气相中泡沫摩尔分数的增大而增大。
A numerical simulator describing foam generation, coalescence and migration during the process of foam flooding in porous media was developed based on the established mathematical model. Taking the pilot test area of foam flooding in west block of Chengdong Oilfield as an example, this paper analyzes the rate distribution and influential factors of foam generation, natural coalescence and oil-contacting coalescence in each grid by using the numerical simulator. The results show that foam generation rate increased with average permeability, gas saturation and foam mole fraction in gas phase, while it decreased with increasing oil saturation. Natural coalescence rate increased with average permeability, gas saturation, oil saturation and foam mole fraction in gas phase. Oil-contacting coalescence rate increased with oil saturation and foam mole fraction in gas phase.
[1] 钱昱, 张思富, 吴军政, 等. 泡沫复合驱泡沫稳定性及影响因素研究[J]. 大庆石油地质与开发, 2001, 20(2): 33-35. Qian Yu, Zhang Sifu, Wu Junzheng, et al. Foam stability and effecting factors of foam combination flooding[J]. Petroleum Geology & Oilfield Development in Daqing, 2001, 20(2): 33-35.
[2] 李雪松, 王军志, 王曦. 多孔介质中泡沫驱油微观机理研究[J]. 石油钻探技术, 2009, 37(5): 109-113. Li Xuesong, Wang Junzhi, Wang Xi. Studies of microcosmic foam driving mechanism in porous medium[J]. Petroleum Drilling Techniques, 2009, 37(5): 109-113.
[3] 张广卿, 刘伟, 李敬, 等. 泡沫封堵能力影响因素实验研究[J]. 油气地质与采收率, 2012, 19(2): 44-46. Zhang Guangqing, Liu Wei, Li Jing, et al. Experimental study on the factors influencing the blocking ability of foam[J]. Petroleum Geology and Recovery Efficiency, 2012, 19(2): 44-46.
[4] Mast, R F. Microscopic behavior of foam in porous media[C]. Fall Meeting of the Society of Petroleum Engineers of AIME, San Antonio, Texas, October 8-11, 1972: SPE-3997-MS.
[5] Owete O S, Brigham W E. Flow behavior of foam: A porous micromodel study[J]. SPE Reservoir Engineering, 1987, 2(3): 315-323.
[6] Kharabaf H, Yortsos Y C. A pore-network model for foam formation and propagation in porous media[J]. SPE Journal, 1998, 3(1): 42-53.
[7] Alvarez J M. Foam flow behavior in porous media: Effects of flow regime and porous media heterogeneity[D]. Austin: The University of Texas at Austin, 1998.
[8] Shen C, Nguyen Q, Huh C, et al. Does polymer stabilize foam in porous media?[C]. SPE/DOE Symposium on Improved Oil Recovery, Tulsa, OK, April 22-26, 2006: SPE 99796-MS.
[9] 杜庆军, 侯健, 李振泉, 等. 聚合物强化泡沫驱数学模型及其应用[J]. 计算物理, 2009, 26(6): 872-878. Du Qingjun, Hou Jian, Li Zhenquan, et al. A mathematical model of polymer enhanced foam flooding[J]. Chinese Journal of Computational Physics, 2009, 26(6): 872-878.
[10] 陆先亮, 陈辉, 栾志安, 等. 氮气泡沫热水驱油机理及实验研究[J]. 西安石油大学学报: 自然科学版, 2003, 18(4): 49-52. Lu Xianliang, Chen Hui, Luan Zhian, et al. Study on the mechanism of nitrogen hot-water flooding[J]. Journal of Xi′an Shiyou University: Natural Science Edition, 2003, 18(4): 49-52.
