考虑含水饱和度的产量劈分方法及应用

The method of oil production splitting based on water saturation and its application

为掌握油井分层动用状况在多层油藏精细开发过程中的作用,在常规产量劈分基础上,建立了新的产量劈分方法.该法将小层含水饱和度作为一项重要影响因素,通过相渗曲线将油相相对渗透率以及水相相对渗透率与小层含水饱和度相结合,将油水相相对渗透率看作小层含水饱和度的函数.综合考虑小层渗透率、有效厚度、小层含水饱和度对产量的影响以及相关增产资料,并结合剖面测试资料对劈分结果进行修正.应用该法进行产量劈分,精确度高、适用性强,可满足实际应用需要.

Exactly knowing the oil production from every formation is of great significance to a multi-formation oil reservoir.Based on the formation capacity which is the product of the formation permeability and formation thickness,a new oil production splitting method is developed.As well as the formation capacity,we regard subzone water saturation as an important influencing factor.The oil relative permeability and water relative permeability are respectively related to the subzone water saturation according to the relative permeability curve.The oil and water relative permeability are all treated as the function of subzone water saturation.With the comprehensive consideration of subzone permeability,the effective thickness,the subzone water saturation,as well as the influence of stimulation measures on production,we split oil production and then revise the oil production splitting result by using the profile test data.Applications show that this method is with very good applicability and high accurateness,and can meet the practice need of all kinds of field.