摘要
为了搞清底水油藏高含水期油水两相水平井产能预测,考虑水平井进入高含水期,油水相对渗透率比与含水饱和度半对数曲线不再呈线性关系,通过最小二乘法原理,得到高含水期下新的油水相渗表征公式,给出高含水期水平井油水两相产能公式。通过实例对比,与常规的水平井产能公式计算结果相比,利用本文公式计算出结果与水平井实际产量的相对误差最小,仅为6.2%,对高含水期下水平井的产能预测具有一定的实用性。
In order to make clear the productivity prediction of oil and water two-phase horizontal well in bottom water reservoir in high water cut stage,considered the horizontal well enter high water cut stage,the semi-logarithmic curve of oil and water relative permeability ratio and water saturation is not linear.Based on the principle of least square method,a new formula for oil and water two-phase permeability at high water cut stage is obtained. The formula for oil and water two-phase productivity of horizontal well in high water cut stage is proposed.Through the example comparison,compared with the conventional productivity formula of the horizontal well,the relative error between the result and the actual output of the horizontal well is the smallest by using the formula in this paper.The relative error is only 6.2 %,it is practical to predict the productivity of horizontal well in high water cut stage.
作者
孙恩慧
杨威
汪巍
李博
郭敬民
SUN Enhui;YANG Wei;WANG Wei;LI Bo;GUO Jingmin(Bohai Petroleum Research Institute,Tianjin Branch of CNOOC Ltd.,Tianjin 300452,China)
出处
《石油化工应用》
CAS
2019年第9期21-26,共6页
Petrochemical Industry Application
基金
国家科技重大专项课题“渤海油田加密调整及提高采收率油藏工程技术示范”,项目编号:2016ZX05058-001
关键词
底水油藏
高含水期
油水两相
水平井产能
相渗表征
bottom water reservoir
high water cut stage
oil and water two-phase flow
productivity of horizontal well
characterization of relative permeability
