单家寺稠油油藏不稳定汽驱数值模拟技术研究

Numrical Modeling Technical research of fluctuating steam driving in ShanJiaSi heavy oil reservoir

在单家寺稠油油藏开采过程中,暴露出了油井吞吐轮次多,开发效果差,汽窜现象严重等问题。通过利用成熟的数模软件对井组进行数值模拟,根据现场生产动态分析蒸汽吞吐阶段的汽窜规律,研究单家寺稠油油藏不稳定蒸汽驱的机理,认清不稳定蒸汽驱参数的影响规律,确定了各参数之间的相互关系,并根据正交实验法对参数进行了优化。研究表明不稳定蒸汽驱能有效改善特稠油油藏多轮次吞吐后期的开发效果,是蒸汽吞吐开采提高采收率的一种新途径,同时进行了不稳定蒸汽驱的配套工艺的研究,为大规模推广不稳定蒸汽驱提供了先决条件。

During producing ShanJiaSi heavy oil reservoir ,revealed many questions which oil well had much number of turns taking in and sending out ,effectiveness of development is bad ,steam-scurrylng is seriously . Numerical modeling well cluster by using consummate software ,on the basis of field production performance analyzed sream-scurrying regular pattern . Developed a clear understanding of mechanism of fluctuating steam driving. Getted parametric affecting method during fluctuating steam driving. Optimized the parameters according to orthonormal experimental method . Confirmed interrelationship between the parameters . Research demonstrated Fluctuating steam driving is a new way to enhanced oil recovery during performance history ,which can improve the developing effectiveness at large stage which extro-heavy oil reservoir was taked in and sent out many times . Meanwhile ,researched necessary technology about fluctuating steam driving . Provided condition precedent to popularize fluctuating steam driving large scale.