摘要
稠油油藏流体渗流存在启动压力梯度,结合非达西渗流理论,建立了考虑启动压力梯度的蒸汽吞吐热采物质平衡方法,给出了考虑启动压力梯度的蒸汽吞吐热采采收率计算公式。通过实例计算分析了启动压力梯度、加热半径、泄油半径对蒸汽吞吐热采采收率的影响。研究结果表明,稠油蒸汽吞吐热采采收率随启动压力梯度的增加近似呈线性规律下降;随加热半径的增加和井距的减小而增加。
There existed threshold pressure gradient in the seepage of heavy oil reservoirs.Based on the non-Darcy flow theory,a material balance method of heavy oil CSS was established.A new oil re-covery calculation equation considering threshold pressure gradient in heavy oil CSS was developed.The effects of threshold pressure gradient,heating radius and drainage radius of oil recovery on the CSS development were analyzed by calculating examples.The results show that the oil recovery decreases with the increment of threshold pressure gradient.The oil recovery increases with the decrement of heating radius and well distance.
出处
《长江大学学报（自然科学版）》
CAS
2017年第23期76-79,共4页
Journal of Yangtze University(Natural Science Edition)
基金
国家科技重大专项(2016ZX05025-004)
关键词
启动压力梯度
加热半径
泄油半径
蒸汽吞吐
采收率
物质平衡方法
threshold pressure gradient
heating radius
drainage radius
cyclic steam stimulation
oil recovery
material balance method
