关键词: 水平井, 蒸汽吞吐, 电加热, 原油黏度, 渗透率, 与油水界面的距离

Abstract: The horizontal well steam huff and puff technology is currently the most commonly used technique for heavy oil thermal recovery. With the increase of reservoir depth,deterioration of reservoir properties,and increase of crude oil viscosity,the injection effect of horizontal well steam huff and puff becomes worse,resulting in a reduction in the economic benefits of oil field development. During the oil recovery process of horizontal well steam huff and puff,the use of electric heating assistance to improve steam dryness,optimize injection profiles,and enhance injection capacity has become a common practice. By adopting reservoir numerical simulation methods,this study investigates the influence of reservoir parameters,such as crude oil viscosity,reservoir permeability and gradient,and distance from the oil-water interface on the heavy oil thermal recovery effect of electric heating-assisted steam huff and puff in horizontal wells,providing a reference for selection in electric heating-assisted steam huff and puff thermal recovery of horizontal wells in the Bohai Oilfield.

Key words: horizontal well, steam huff and puff, electric heating, crude oil viscosity, permeability, distance from oil-water interface