PVT实验拟合及最小混相压力确定

PVT matching and minimum miscible pressure

对实验室的PVT实验进行拟合校正,得到可反应真实储层流体特性的状态方程参数是油藏参数处理的一个重要手段。通过对F油田PVT数据的拟合,提出了PVT拟合时应注意的问题和解决方法。基于Whitson劈分准则分析了组分的劈分原则以及检验标准。为了模拟计算的方便,在劈分的基础上再次将组分合并,并对比了劈分后和合并后PVT模拟结果,对比结果显示合并后的拟组分较好的反映了储层流体特性。最后利用PVT拟合的结果,模拟了细管实验,通过双直线回归分析的方法计算了最小混相压力。该研究对完善PVT模拟研究和混相驱开发有一定的指导意义。

To obtain the formation fluid physical state equation by laboratory data PVT matching is an efficient method to characterize the reservoir parameters.This article describes the PVT matching for F Oilfield as well as the concerns and solutions during this process.The rules of formation fluid composition splitting and validation criteria are analyzed based on Whiten splitting criteria.Composition grouping after splitting provides a convenient way for analog calculation.It also reveals that the composition by regrouping characterizes the formation fluid more practicable.Slime tube test is performed by the result of PVT matching.Finally,minimal miscible pressure is available through twin straight line regression analysis.This article offers guidance for research of PVT matching and miscible flooding.