考虑启动压力的非牛顿幂律流体产能计算新方法
A new method for calculating productivity of non-Newtonian power-law fluids with considera-tion to starting pressure
刘超 1陈存良 1赵汉卿1
作者信息
- 1. 中海石油(中国)有限公司天津分公司 天津 300452
- 折叠
摘要
针对现有稠油油藏非牛顿幂律流体的产能计算方法缺乏实用性的问题,基于非牛顿幂律流体的产能公式,考虑非牛顿幂律流体特性和启动压力梯度,建立了稠油油藏产能计算新方法.根据幂律流体径向稳定渗流模型建立定向井产量模型,结合Joshi水平井产能公式,利用儒柯夫斯基变换将平面椭圆流变换为平面径向流,并根据水电相似原理的等值渗流阻力法,推导建立了考虑启动压力梯度的非牛顿幂律流体的水平井产能新公式.矿场应用表明,新方法计算结果与现场实际生产结果对比,误差均小于 10%,在允许误差范围内,满足生产需求,具有较好的实用性.新方法为同类型油藏的产能评价提供了一定的技术借鉴.
Abstract
The existing methods for calculating productivity of non-Newtonian power-law fluids in heavy oil reservoirs are less practical.This paper presents a new method for calculating productivity in heavy oil reservoirs based on the formula for non-Newtonian power-law fluids,with consideration to the properties of non-Newtonian power-law fluids and the starting pressure gradient.Utilizing the radial stable flow model for power-law fluids,a production model for directional wells was established.By combining Joshi′s formula for horizontal well productivity,the plane elliptical flow was converted to radial flow by using the Joukowsky transformation,and a new formula for calculating the productivity of non-Newtonian power-law fluids in horizontal well with consideration to the starting pressure gradient was derived based on the equivalent flow resistance method of the hydraulic-electric analogy principle.Field applications show that compared to actual production results,the results calculated by the new method have an error of less than 10%,within the acceptable range,which meets the production requirements and demonstrates a satisfactory practicality.This new method provides valuable technical insights for evaluating productivity in similar reservoirs.
关键词
稠油油藏/非牛顿幂律流体/水平井/产能公式/启动压力/平面径向流Key words
heavy oil reservoir/non-Newtonian power-law fluid/horizontal well/productivity formula/starting pressure/plane radial flow引用本文复制引用
基金项目
中海石油(中国)有限公司科技攻关项目(YXKY-2018-TJ-04)
出版年
2024
NETL
NSTL
万方数据