CO2单井吞吐技术的增油机理及应用

INCREASE PRODUCTION MECHANISM AND APPLICATION OF CO2 HUFF AND PUFF TECHNOLOGY

蔡秀玲 周正平 杜风华

Cai Xiuling Zhou Zhengping Du Fenghua

胜利石油管理局, 山东东营 257000 华东石油地质局, 江苏泰州 225300 胜利油田股份有限公司, 山东东营 257000

CO2单井吞吐工艺是一种提高油气采收率的有效方法,其主要技术原理为:在地层温度条件下CO2能快速溶于原油中,从而改变原油的物性,大幅度降低原油粘度,增加溶解气驱的能量,进而达到油井增产的目的。介绍了CO2单井吞吐工艺增油机理、选井条件和部分油井实施本工艺的实际效果。现场应用实践证明,该技术具有明显的增油效果,具有很好的推广应用价值。

The CO2 huff and puff increase production technology is one kind of method of enhanced oil recovery. The mechanism is that CO2 can change the physical quality of oil when it dissolving in oil under the condition of formation, so the viscosity of oil has been depressed and the energy of CO2 drive has been increased. Field testing indication that the technology have evidence increase productivity effect. The condition to select well and the effect of some wells after using the technology was introduced.

10.3969/j.issn.1000-7393.2002.04.016