摘要
特高含水油田剩余油分布复杂零散,调整挖潜难度较大,明确剩余油潜力分布区域及范围是进一步提高水驱采收率的关键。采用数值模拟技术、动态分析方法对剩余油分布特征进行了剖析,从剩余油量丰度、剩余油饱和度等方面对剩余油进行量化分类评价,明确了剩余油分类的界限和标准,划分出4种类型剩余油。在此基础上,根据剩余油类型进行矢量注采调整对策研究,指出对Ⅰ,Ⅱ类剩余油采取抽稀注采井网、转变流场分布对策;Ⅲ类剩余油采取加密注采井网、优化注采结构对策;Ⅳ类剩余油采取封堵高耗水层、改变液流方向对策。该研究成果在双河南块的现场应用取得了较好的稳油增产效果,为特高含水开发期油田进一步提高采收率、稳产高效开发提供了技术支持。
The distribution of remaining oil in ultra-high water cut oilfield is complex and scattered,and it is difficult to adjust and tap the potential.It is the key to further improve the water drive recovery ratio to make clear the distribution area and scope of the remaining oil potential.The remaining oil distribution characteristics are analyzed by using numerical simulation technology and dynamic analysis method.The remaining oil is quantitatively classified and evaluated from the aspects of remaining reserve abundance and remaining oil saturation.The boundary and standard of remaining oil classification are defined,and four types of remaining oil are divided.On this basis,according to the type of remaining oil,vector injection production adjustment countermeasures are studied.It is pointed out that the countermeasures of reducing injection production well pattern and changing flow field distribution are adopted for class I and II remaining oil;infilling injection production well pattern and optimizing injection production structure are adopted for class III remaining oil;and measures for blocking high consumption water layer and changing fluid flow direction are adopted for class IV remaining oil.The field application of the research results in the south block of Shuanghe has achieved good effect of stabilizing oil production and increasing production,which provides technical support for further enhancing oil recovery and stable and efficient development of oilfield in ultra-high water cut development stage.
作者
李蕾
周继龙
王芳
方越
胡荣
LI Lei;ZHOU Jilong;WANG Fang;FANG Yue;HU Rong(Petroleum Exploration and Development Research Institute,Henan Oilfield Branch Company,Sinopec,Henan Nanyang 473132,China;Henan EOR Key Laboratory,Henan Nanyang 473132,China)
出处
《非常规油气》
2021年第3期80-89,共10页
Unconventional Oil & Gas
基金
中石化河南油田分公司项目“双河油田失控储量再动用技术研究”(2020-019)。
关键词
剩余油分布
分类评价
矢量注采调整
采收率
双河南块
distribution of remaining oil
classified evaluation
vector injection production adjustment
EOR
Shuanghe south block
