驱替效率

随着多孔介质毛细管力的增加，CO2驱替效率降低，系统达到稳定状态的时间缩短。

The displacement efficiency and the time needed for achieving system stability both decline with increasing capillary pressure .

此外，随着毛细管力的增加，毛细管力对驱替效率和稳定时间的影响逐渐减小；（4）毛细管力的非均质性是造成CO2饱和度的最终不规则分布主要原因之一。

Further , with the increase of capillary pressure , its influence on the displacement efficiency and the steady time also decrease ;( 4 ) the capillary heterogeneity may lead to the anomalous distribution of CO2.Besides .

FCY体系提高稠油油藏采收率实验表明：FCY泡沫剂可有效降低油水界面张力，提高注入蒸汽的驱替效率；

The experimental results show that the FCY foaming agent decreases the interfacial tension of oil / water and raises the oil displacement efficiency .

针对外围油田部分注水井注入压力高、注水驱替效率低及套损井不断增加等情况，开展了表面活性剂降低注水井注入压力室内实验研究。

Aiming at the problem of high water injection pressure and low displacement efficiency , laboratory research on decreasing injection pressure by surfactant has been in process .

为提高紊流固井驱替效率和缩短井眼准备时间，提出在固井前突击调整钻井液流变性（实质是使局部井段钻井液流变性趋近牛顿流型）的新方法。

A new method that adjusts drilling fluid rheological properties before cementing was proposed so as to improve displacement efficiency of turbulent cementing and shorten preparation time .

伴蒸汽注入氮气和泡沫剂可有效提高蒸汽的波及效率和驱替效率，改善稠油热采的开发效果。

Nitrogen and foaming agents injected with steam can raise the sweep efficiency and displacement efficiency of the steam , and improve the effect of thermal exploitation .

研究结果表明，石油磺酸盐体系可有效降低蒸汽注入压力，提高驱替效率和岩心采收率。

The result shows that the sulfonate system can be used to effectively reduce the injection pressure and raise the efficiency of steam drive and core recovery ratio .

堵剂的性能直接影响封堵效果，为进一步提高封堵成功率和驱替效率，对聚合物凝胶封堵剂进行了室内性能评价和现场试验。

The performance of block agent effect the effectiveness of blocking , so laboratory and field experiment of polymer gel block agent were done to enhance its blocking effectiveness .

油水之间的高界面张力导致蒸汽驱替效率低是多轮次吞吐后开发效果变差的主要原因之一。

One of the major reasons of poor production result after multi-steam soak is caused by low efficient steam drive induced by high interfacial tension between oil and water .

本项研究将对稠油热采开发模式、地质条件变化规律、剩余油分布及驱替效率研究工作具有积极意义；

This study is significant on the development model of thermal drive , the variation of geologic conditions , the distribution of remaining oil and the efficiency of steam drive .

但国内外大部分油藏都因地层的非均质性和天然水体能量的不足，为了改善驱替效率和维持地层能量，提高油藏最终采收率，必须辅以人工注水。

But by reason of formation 's anisotropy and the deficiency of natural water energy , for the sake of improving displacing efficiency , sustaining formation energy and enhancing the ultimate recovery , most of reservoir should supplement the artificial water injection .

当水平井产量极高时，受水平井筒管流影响，见水部位将向水平井根端偏移。（4）不考虑井筒管流影响下，底水驱替效率伴随着水平井长度的增加而增加。

If the horizontal well has very high output , the affect of borehole tube current are larger , the place of breakthrough will deviate to heel . ( 4 ) With horizontal well length increasing , displacement efficiency function will add ( not think about borehole tube current ) .

多层油藏非活塞式水驱驱替效率研究

A new method for calculating non-piston displacement efficiency in multilayered reservoir with waterflooding

驱替流体的冲刷效率是靠消除或降低驱替液与原油之间的界面张力而增加的，随着剩余油的减少，人们可以使用一些其它开发方法如混相驱和表面活性剂驱油技术。

Flushing efficiency of displacing fluid can be increased by eliminating or decreased surface tense between displacing fluid and oil , and then residual oil can be decreased dramatically , some recovery means like miscible flooding and surfactant flooding can be used .

非均质油藏化学驱波及效率和驱替效率的作用

Effects of oil displacement efficiency and conformance efficiency of chemical flooding in heterogeneous reservoirs

其次，对化学剂控制水相流度进行了理论分析，论证了化学剂可以到达蒸汽前缘，分析了加入化学剂对蒸汽驱流度比、驱替效率的影响。

Next , the mechnism of water phase mobility control by chemical agent was analyzed theoretically , the possibility of chemical agent to reach the steam front was demonstrated , and the influences of chemical agent on mobility ratio and displacement efficiency of steam flooding were analyzed .

通过多周期的注水吞吐开发，逐渐扩大水驱波及半径，提高驱替效率。

Cyclic water injection development can expand sweep radius and enhance displacement efficiency .

降低界面张力、增强驱油剂的黏弹性、增加驱替速度，有利于提高驱替残余油膜的驱替效率。

Decreasing interfacial tension or enhancing the viscoelasticity or displacement velocity is favorable to increasing the displacement efficiency of oil film .

基于油膜驱替的微观实验，采用数值方法从定量的角度分别计算了不同黏弹性驱油剂在不同的驱油剂/原油界面张力作用下对残余油膜的驱替效率。

Furthermore , based on the experimental results , the displacement efficiency for viscoelastic fluid is quantitatively calculated by a numerical method at different interfacial tensions .