[1]苏玉亮,姜妙伦,孟凡坤,等.基于分流理论的低渗透油藏CO2泡沫驱渗流模拟[J].深圳大学学报理工版,2018,35(2):187-196.[doi:10.3724/SP.J.1249.2018.02187]
　SU Yuliang,JIANG Miaolun,MENG Fankun,et al.Flow modelling of CO2 foam flooding in low permeability reservoirs based on fractional flow function[J].Journal of Shenzhen University Science and Engineering,2018,35(2):187-196.[doi:10.3724/SP.J.1249.2018.02187]
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基于分流理论的低渗透油藏CO2泡沫驱渗流模拟()
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《深圳大学学报理工版》[ISSN:1000-2618/CN:44-1401/N]

卷:
第35卷
期数:
2018年第2期
页码:
187-196
栏目:
环境与能源
出版日期:
2018-03-20

文章信息/Info

Title:
Flow modelling of CO2 foam flooding in low permeability reservoirs based on fractional flow function
文章编号:
201802012
作者:
苏玉亮1; 姜妙伦1; 孟凡坤2; 詹世远1; 盛广龙1; 陈颖3
1）中国石油大学（华东）石油工程学院，山东青岛 266580
2）中国石油勘探开发研究院，北京 100083
3）中国石油长庆油田采气三厂，陕西西安 017300
Author(s):
SU Yuliang1;  JIANG Miaolun1;  MENG Fankun2;  ZHAN Shiyuan1;  SHENG Guanglong1;  and CHEN Ying3
1) School of Petroleum Engineering, China University of Petroleum, Qingdao 266580, Shandong Province, P.R.China
2) PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, P.R.China
3) The Third Gas Production Plant of Changqing Oilfield, Xi’an 017300, Shaanxi Province, P.R.China
关键词:
油气田开发工程; 低渗透油藏; CO2泡沫驱; 渗流特征; 含水饱和度分布; 分流理论; 数值模拟; 曲线分析
Keywords:
oil and gas field development engineering;  low permeability oil reservoir;  CO2 foam flooding;  fluids seepage characteristic;  water-saturation distribution;  fractional-flow function;  numerical simulation;  graphic solution
分类号:
TE 348
DOI:
10.3724/SP.J.1249.2018.02187
文献标志码:
A
摘要:
泡沫驱油体系在多孔介质中的渗流机理十分复杂，为准确认识CO2泡沫驱油机理，揭示其渗流规律．本研究基于低渗透油藏CO2泡沫驱渗流特征，考虑启动压力梯度及泡沫中表面活性剂的吸附，根据分流理论和物质平衡原理，将表面活性剂分别溶于水或CO2，并在不同注入条件下，分别建立低渗透油藏CO2泡沫驱一维渗流模拟模型．运用图解法进行求解，确定驱替过程中含水饱和度的剖面分布．油藏数值模拟结果验证了所建模型的有效性．对不同泡沫质量、表面活性剂分布情况下的曲线进行分析，结果表明，泡沫中含水率提高，泡沫质量变差，泡沫驱替前缘移动速度先增后减，存在最佳的含水饱和度使得驱替效果最好；泡沫混相驱替前缘移动速度随气相与液相中表面活性剂质量浓度之比的增大而增加，当其趋近于无限大时，驱替效果达到最优．
Abstract:
The seepage mechanism of foam flow in porous media is very complicated. The purpose of this research is explaining the flooding mechanism accurately and revealing the seepage mechanism of CO2 foam flow in porous media. Based on the characteristics of CO2 foam flow in low permeability oil reservoirs, a novel model of CO2 foam flooding considering the effects of surfactant adsorption and threshold pressure gradient is established and solved using the fractional-flow function and the principle of material balance. We derive the fractional-flow solutions for the foam displacement to find the water-saturation distribution in system, in the two cases of surfactant dissolved in supercritical CO2 or in water, respectively. The numerical simulations are presented to verify the graphical solutions obtained from fractional-flow function. In addition, the controlling factors that control the mobility and moving velocity of the foam bank are investigated, and the optimal design of flooding process is proposed (in the context of idealized 1D displacements). As the water fraction of the injected foam increases with deterioration of foam quality, the velocity of the flooding front would first increase and then decrease. Therefore, the optimal water fraction can be expected to maintain the gas front slightly ahead of the foam front for best performance. The propagation of the foam front depends on both surfactant adsorption onto rock and the partitioning of surfactant between water and CO2. The optimal process can be reached while the ratio of surfactant concentrations dissolved in CO2 to that in water tends to zero. Our work can provide a theoretical basis for the design of CO2 foam process in field applications.

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备注/Memo

备注/Memo:
Received：2017-02-04；Revised：2017-11-27；Accepted：2017-12-01
Foundation：National Basic Research Program of China （2014CB239103）； National Natural Science Foundation of China （51674276）
Corresponding author：Professor SU Yuliang. E-mail: suyuliang@upe.edu.cn
Citation：SU Yuliang, JIANG Miaolun, MENG Fankun, et al. Flow modelling of CO2 foam flooding in low permeability reservoirs based on fractional flow function［J］. Journal of Shenzhen University Science and Engineering, 2018, 35(2): 187-196.（in Chinese）
基金项目：国家重点基础研究发展计划资助项目（2014CB239103）；国家自然科学基金资助项目（51674276）
作者简介：苏玉亮（1970—），男，中国石油大学(华东)教授、博士生导师．E-mail：suyuliang@upc.edu.cn
引文：苏玉亮，姜妙伦，孟凡坤，等. 基于分流理论的低渗透油藏CO2泡沫驱渗流模拟［J］. 深圳大学学报理工版，2018，35(2)：187-196.
更新日期/Last Update: 2018-03-07