摘要
以曹台潜山高凝油为实验介质,利用就地生成CO2技术,通过室内实验研究了CO2吞吐对于高凝油开采的有效程度。实验结果表明:CO2吞吐可以有效地提高高凝油的驱油效率。CO2溶解在高凝油中,可以降低高凝油的粘度、凝固点,改善高凝油的流动特性,在地层中形成溶解气驱,增加地层能量,同时可以降低注水压力,改善吸水剖面。就地生成CO2可以解决包括油气区天然CO2气源的短缺问题,大量CO2气体的运输、储存问题,大量注气带来的环境问题以及CO2注气利用率低和工艺成本费用高的问题等。该研究可以为高凝油藏提高采收率试验提供参考。
Taking high pour point oil of Caotai buried hill as media, and using CO2 in - situ generation technique, this paper studies effectiveness degree of high pour point oil production by CO2 huff - and puff. Experimental result shows that CO2 huff- and puff can effectively increase displacement efficiency of high pour point oil. CO2 dissolved in high pour point oil can decrease viscosity and pour point of high pouring point oil, improve flow performance, form dissolved gas drive in formation, increase formation energy, decrease water injection pressure, and improve water injectivity profile. CO2 in-situ generation can solve problems including lack of gas source in oil and gas area, transportation and storage of CO2, environmental pollution caused by large amount of gas injection, low utility percentage of gas injection and high cost of technique. This study provides parameters for EOR experiment of high pour point oil reservoir.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2007年第3期111-114,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
中石油创新基金项目"高温混合气采油技术"(编号:03E7035)的部分成果
关键词
就地生成
CO2
高凝油
吞吐
室内实验
insitu generation
CO2
high pour point oil
huff-and puff
lab experiment
