稠油油藏CO_2吞吐参数优选室内实验

L油田属普通稠油油藏,由于油水粘度差异,油藏非均质性强等因素影响,水驱开发效果差。而CO2吞吐技术主要是通过原油降粘和体积膨胀来达到提高采收率的目的。为提高L油田开发效果,通过室内物理模拟实验,分析了CO2吞吐技术在L油田应用的可行性,对影响CO2吞吐效果的影响因素进行总结分析。实验结果表明,CO2注入量、循环周期、注入速度及关井时间等是影响CO2吞吐作业提高采收率的主要影响因素。在选用合理的注入工艺参数条件下,利用CO2吞吐技术可以有效改善L油田开发效果。

Experiment study for parameter optimization on CO2 huff and puff in heavy oil reservoir

The L oilfield is a typical heavy oil reservoir.The high oil viscosity and the heterogeneity lead to the poor performance of the water flooding development effect.The mechanism of CO2 huff and puff enhanced oil recovery include two aspects,thin out the crude and volume expansion.In order to improve the development effectiveness of the L oilfield,in-house experimental approach is conducted to realize the influencing factors of CO2 huff and puff and the feasibility in L oilfield.The experiment result show that,the injection gas volume,cycle period, injection rate and the shut-in time all have an influence on the performance of CO2 huff and puff,and good effect can be received by properly controlling the parameters listed above.