变形介质边水稠油油藏见水时间预测方法

Method for Estimating Water Breakthrough Time in Heavy Oil Reservoir with Deformed Media and Edge-Water

世界上稠油资源极为丰富,有很大部分符合幂律型流体特征,且油藏具有充足的边水能量。而在稠油油藏中,有部分储层岩石表现出明显的变形介质特征。边水舌进是变形介质边水稠油油藏开发过程中的一个重要问题,准确预测其中油井的见水时间对实际生产具有一定的指导意义。基于油水两相渗流理论,综合考虑介质变形以及稠油幂律特征的影响,推导出变形介质边水稠油油藏见水时间的预测公式,并进行了实例及影响因素分析。结果表明,利用该公式进行变形介质边水稠油油藏见水时间的预测是可行的,对油藏工程设计和理论研究具有一定的指导意义。

The earth is abundant in heavy oil resources.Most of it presents power law feature and oil reservoir is characterized by active edge water.Moreover,rock deformation is evident in some above mentioned heavy oil reservoirs.Edge-water tonguing is an important issue in the development of heavy oil reservoirs with deformed media and edge water.Accurately estimating water breakthrough time is helpful to the practical production.Based on the theory of fluids flow in porous media,a formula of estimating water breakthrough time which includes the effect of deformed media and power law feature is deduced.Then the real case and relative influential factors are analyzed.Results show that using this formula for the prediction of water breakthrough time of vertical well in heavy oil reservoir with deformed media and edge water is feasible.And this method is also useful for oil reservoir engineering design and the theoretical study of such kind of reservoirs.