摘要
储层的高度非均质性是制约油田开发的一个主要因素 ,而周期注水是减小储层非均质性不利影响的开发措施。利津油田利 33- 19井组成功地实施了周期注水 ,应用效果显著。应用油藏数值模拟手段对利 33- 19井组周期注水效果进行了分析研究。注水的周期性变化 ,使得油水平面及纵向渗流发生改变 ,引起高渗透层含水饱和度的降低 ,改善了开发效果。日注水量越大 ,高渗透层原油的浸入越多 ,效果越好 ;随开采程度的提高 ,周期注水效果变差 ,这时注水周期应缩短 。
Severe heterogeneity of the reservoir is a very important factor that restricts the development effect. Cyclic waterflooding is an excellent method of reducing unfavorable effect of the heterogeneity. Cyclic waterflooding is carried out in Li 33-19 well group of LiJin oilfield achieving a satisfactory application result. The efficiency of the cyclic waterflooding in Li 33-19 well group has been studied with the help of reservoir numerical simulation. The periodic change of water flooding results in the difference of the planar and vertical flow of oil and water, which makes the water saturation in the highpermeability reservoir reduce and development effect improve. The more volume of daily water injection, the more crude immersion in the high permeability reservoir and the better efficiency. Along with the further development of oil field, the cyclic waterflooding effectiveness becomes poor. At this time, the injection cycle should be reduced and intensity of water injection should be enhanced.
出处
《油气地质与采收率》
CAS
CSCD
2004年第3期48-50,共3页
Petroleum Geology and Recovery Efficiency
关键词
利津油田
储层
非均质性
油田开发
注水开发工艺
numerical simulation, cyclic waterflooding, history matching,heterogeneity,intensity of water injection
