组分模型在带气顶高挥发性油藏中的应用

APPLICATION OF THE COMPOSITIONAL MODEL IN THE HIGHVOLATILITY OIL RESERVOIRS WITH A GAS CAP

根据钻井取心、开发动态、实验分析资料综合分析了SW.B油藏流体分布和流体性质特征,尤其是流体在渗流过程中的相态行为变化和通过井筒到达地面第二级分离器标准状况下的物性变化规律,将全组分实验分析数据劈分、合并为7个拟组分,通过三参数PR状态方程进行实验分析数据拟合,获得组分模型计算必须的状态方程基础参数,建立SW.B油藏高精度组分数值模型,定量描述剩余油、气饱和度分布,为开发方式优化、编制开发调整方案提供了依据,对类似油藏的合理开发有重要的指导意义.

The muhidisciplinary comprehensive analysis on the distribution and the property characteristics of the fluids in SW. B oil reservoirs by means of the drilling sampling, reservoir performances and experimental analyzing data, especially the changed phase behaviors of the fluids in the process of the flow and the changed laws of the physical properties the liquids from the well bore to the second-step separator on the ground under the standard con- ditions. The experimental analyzing data of the fully compositional model are split and merged into 7 pseudo-compo- sitions. Through matching the experimental analyzing with three-parameter PR EOS, the basic parameters of the state equation needed for the calculation of the model are obtained, the high-precision compositional model of the numerical simulation is established for SW. B oil reservoir, the distributions of the remained oil and gas saturation are quantitatively characterized. All the achievements stated above have provided the evidences for the optimization of the development modes and compilation of the developing and adjusting program, and furthermore possess impor- tant guiding significance for the rational development of those similar oil reservoirs.