超稠油蒸汽驱开发热效率研究及注气策略优选  

A Breakthrough Study on the Method of Improving the Thermal Efficiency of Steam Flooding of Super-Heavy Oil

作　　者：杨钊[1] 苏子龙 YANG Zhao;SU Zi-long(School of Petroleum Engineering,Northeast Petroleum University,Daqing 163318,China)

机构地区：[1]东北石油大学石油工程学院,黑龙江工大庆163318

出　　处：《数学的实践与认识》2023年第10期126-135,共10页Mathematics in Practice and Theory

基　　金：中石油创新基金项目:致密气藏注热气体提高采收率机理研究(2019D-5007-0205)。

摘　　要：针对超稠油油藏蒸汽驱热效率的利用普遍偏低的问题,结合某超稠油区块的实际地层情况,建立直井与水平井组合蒸汽驱井组三维油藏数值模拟模型,运用单因素分析法,研究井网形式、井组井距、注汽井射孔位置、注气介质对超稠油蒸汽驱开发的影响,并验证了模型的可行性.研究结果表明:中央排状井网对比反五点法、反七点法、反九点法、右起排状井网,可以更好的利用热效率;VPHI型注汽方式加热半径和波及范围更大;井距从50m升至100m过程中,生产效果先上升后大幅下降,在70m生产效果最好,井距过大,热损失严重;射孔方式随着厚度增加影响效果逐渐减小;在蒸汽吞吐转驱前注入0.4组分的CO_(2)和0.6组分的N_(2),可以更好地封存热量,减少热损失,提高热效率.该研究对同类型油藏提高采收率有重要指导意义。In view of the generally low utilization of steam flooding thermal efficiency in super heavy oil reservoirs,combined with the actual formation situation of a super heavy oil block,a three-dimensional reservoir numerical simulation model of vertical well and horizontal well combination steam flooding group was established,and the influence of well pattern form,well group spacing,perforation location of steam injection well and gas injection medium on the development of super heavy oil steam flooding was studied by single factor analysis method.The feasibility of the model is verified.The results show that compared with the reverse five-point pattern,the reverse seven-point pattern,the reverse nine-point pattern and the right-starting pattern,the central well pattern can make better use of thermal efficiency.VPHI steam injection mode heating radius and sweep range is larger;When the well spacing increases from 50m to 100m,the production effect increases first and then drops sharply.The best production effect occurs at 70m,because the well spacing is too large and the heat loss is serious.The effect of perforating method decreases with the increase of thickness.Injecting 0.4 component CO_(2) and 0.6 component N_(2) before steam huff and puff drive can better store heat,reduce heat loss and improve thermal efficiency.This study has important guiding significance for enhancing oil recovery of the same type reservoir.

关 键 词：超稠油 蒸汽驱 热效率 井网 井距 注气介质 

分 类 号：TE357.44[石油与天然气工程—油气田开发工程]