Mechanism of gas-water flow at pore-level in aquifer gas storage
来源期刊：中南大学学报(英文版)2013年第12期
论文作者：SHI Lei(石磊) WANG Jie-ming(王皆明) LIAO Guang-zhi(廖广志) XIONG Wei(熊伟) GAO Shu-sheng(高树生)
文章页码：3620 - 3626
Key words：aquifer gas storage; gas-water flow; injection-withdrawal cycle; etched-glass micromodel; water lock
Abstract: By means of the pore-level simulation, the characteristics of gas-water flow and gas-water distribution during the alternative displacement of gas and water were observed directly from etched-glass micromodel. The results show that gas-water distribution styles are divided into continuous phase type and separate phase type. The water lock exists in pore and throat during the process of gas-water displacement, and it reduces the gas flow-rate and has some effects on the recovery efficiency during the operation of gas storage. According to the experimental results of aquifer gas storage in X area, the differences in available extent among reservoirs are significant, and the availability of pore space is 33%-45%.
SHI Lei(石磊)1, WANG Jie-ming(王皆明)1, LIAO Guang-zhi(廖广志)2, XIONG Wei(熊伟)1, 3, GAO Shu-sheng(高树生)1, 3
(1. Langfang Branch, PetroChina Research Institute of Petroleum Exploration and Development,
Langfang 065007, China;
2. Exploration and Development Company, CNPC, Beijing 100007, China;
3. Institute of Porous Flow and Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, China)
Abstract:By means of the pore-level simulation, the characteristics of gas-water flow and gas-water distribution during the alternative displacement of gas and water were observed directly from etched-glass micromodel. The results show that gas-water distribution styles are divided into continuous phase type and separate phase type. The water lock exists in pore and throat during the process of gas-water displacement, and it reduces the gas flow-rate and has some effects on the recovery efficiency during the operation of gas storage. According to the experimental results of aquifer gas storage in X area, the differences in available extent among reservoirs are significant, and the availability of pore space is 33%-45%.
Key words:aquifer gas storage; gas-water flow; injection-withdrawal cycle; etched-glass micromodel; water lock
