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影响CO2吞吐采油效果的若干因素研究
引用本文:杨胜来,郎兆新.影响CO2吞吐采油效果的若干因素研究[J].西安石油大学学报(自然科学版),2002,17(1).
作者姓名:杨胜来  郎兆新
作者单位:石油大学石油工程系,北京,昌平,102200
基金项目:中国石油天然气集团公司提高采收率导向技术项目“注气提高采收率技术与评价方法”(1998- 1999)
摘    要:为了研究 CO2 吞吐的生产规律及其影响因素 ,进行了一系列室内实验 .着重研究吞吐时机(水驱后 CO2 吞吐 ,自喷后 CO2 吞吐 )、降压方式 (一次降压 ,多级降压 )、原油粘度 ( 1 1 .7,2 0 ,1 0 0 ,1430 ,2 5 4 0 m Pa·s)及 CO2 注入量、井底流压等因素对产油量的影响 .得到了实验条件下所研究的因素与周期产油量的关系曲线 .研究认为增加 CO2 注入量或降低井底流压、一次降压能够提高产油量 ;对稀油油藏 ,水驱后 CO2 吞吐的周期采出程度可达 2 %~ 3% ;对稠油则因其粘度的大小 ,换油率的大小不同而有差异 ,原油粘度增加吞吐效果变差 .该研究对 CO2 吞吐现场应用的设计具有一定的参考价值

关 键 词:二氧化碳吞吐  提高采收率  原油粘度

Experimental Study on the Factors of Influencing the Result of CO2 Huff-puff
YANG Sheng lai,LANG Zhao xin.Experimental Study on the Factors of Influencing the Result of CO2 Huff-puff[J].Journal of Xian Shiyou University,2002,17(1).
Authors:YANG Sheng lai  LANG Zhao xin
Abstract:In order to study the factors of influencing CO 2 huff puff result, a serials of experiments were carried out. The experimental results show that, (1) increasing the injection volume of CO 2 and the rate of pressure declining, or decreasing BHP will increase recovery factor; (2) the higher the viscosity of oil, the lower the recovery factor, to thin oil, the recovery factor of 2%~3% can be reached to after water drive in a CO 2 huff puff cycle, to the heavy oil of viscosity less than 250mPa.s, the efficiency (oil/CO 2) of CO 2 huff puff is greater than 1.5m 3/km 3, and to the heavy oil of viscosity greater than 2500mPa.s, the efficiency is less than 1.0m 3/km 3; (3) higher recovery factor can be achieved to at higher initial oil saturation. The relation curves are presented between the factors and cyclic oil production. It is concluded that CO 2 huff puff is a potential way to enhance oil recovery factor.
Keywords:carbon dioxide huff  puff  enhancing recovery factor  oil viscosity
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