中低渗油藏特高含水期深部调驱实践与认识
Application and cognition of the in-depth profile modifica-tion and flooding technology in ultra-high water cut period of medium and low permeability reservoir
戴志鹏 1马惠 2毛超琪 2钱志鸿1
作者信息
- 1. 中石化江苏油田分公司石油工程技术研究院,江苏 扬州 225009
- 2. 中石化江苏油田分公司采油二厂,江苏 淮安 211600
- 折叠
摘要
针对江苏油田典型特高含水油藏G6区块,结合当前开发现状及中低渗储层特征,选择分散型堵剂进行深部调驱试验,从注入粒径、注入浓度和注入体积等工艺参数对调驱工艺进行优化,现场应用2个井组.结果显示:由于长期水驱形成高渗条带与大孔道,柔性颗粒调驱剂的粒径选择不应依赖原始孔喉尺寸,应在调驱过程中根据注入压力和油井响应及时调整,添加超大颗粒或连续相高强度堵剂转向段塞,封堵高渗水窜通道;树立整体调驱理念,可有效避免注水井组互相干扰,扩大井区波及体积,达到整体降水增油的目的.
Abstract
According to G6 block,a typical ultra-high water cut reservoir in Jiangsu oilfield,combined with the current development status and the characteristics of medium-low permeability reservoir,the field test of the in-depth profile modification and flooding was carried out by using dispersed phase plugging agent.The pro-cess of flooding was optimized from the process parameters such as injection particle size,injection concentra-tion and injection volume.Two well groups were applied in the field.Results showed that due to the formation of high permeability bands and large pores in long-term water flooding,the size selection of flexible particle modulator should not depend on the original pore throat size,but should be adjusted in time according to injec-tion pressure and well response during the process of flood modulator,and the addition of super-large particles or continuous phase high-strength plugging agent should be diverted to the slug to block the high-permeability water channeling channel.In scheme design,it is necessary to establish the concept of integral flooding con-trol,which can effectively avoid the interference among water injection wells.To achieve the purpose of ex-panding the overall sweep volume,the overall precipitation increase oil.
关键词
特高含水期/中低渗油藏/深部调驱/分散型调驱剂Key words
ultra-high water cut period/medium-low permeability reservoir/in-depth profile modification and flooding technology/dispersed modification and flooding agent引用本文复制引用
出版年
2024
NETL
NSTL
万方数据