海上油田烃气驱气窜规律及封窜策略研究
Research on Gas Channeling Law and Sealing Strategy of Hydrocarbon Gas Drive in Offshore Oilfield
宫汝祥 1张雪娜 2黄子俊 2朱彤宇 2郑玉飞 2薄振宇 1高亚慧1
作者信息
- 1. 中海油田服务股份有限公司油田生产事业部,天津 300459;海洋石油高效开发国家重点实验室,天津 300459
- 2. 中海油田服务股份有限公司油田生产事业部,天津 300459
- 折叠
摘要
针对海上某油田烃气驱阶段开发现状,充分考虑大倾角、断块复杂、非均质等油藏特点,建立了典型井组概念模型,分析气窜程度影响因素及主控因素,并优选气窜调堵技术,以增油量为指标进行技术适应性分析,得到气窜调堵策略图版.结果表明:该油藏烃气驱为非混相驱开发,影响气窜的主控因素为地层倾角、油藏厚度、物源方向,影响气窜程度的主控因素为注气强度、注采井距,影响烃气驱采收率的主控因素为渗透率级差、注气部位.优选动态调配、泡沫法、凝胶法进行调堵技术适应性分析,针对不同气窜类型制定不同的全生命周期封窜策略,针对顺物源和低注高采气窜类型采用动态调配或泡沫法调堵的封窜方法,针对非均质类型气窜采用泡沫+凝胶法调堵的方法封窜,针对断层遮挡类型气窜建议采用泡沫法或泡沫+凝胶法的封窜 策略.
Abstract
According to the development status of hydrocarbon gas flooding stage in an oilfield in the South China Sea,a typical well group conceptual model was established to analyze the influencing factors and main controlling factors of gas channeling degree,considering the characteristics of large dip angle,complex fault block and heterogeneous.Through the optimized gas channeling plugging control technology,the technical adaptability was analyzed by taking oil increment as index,and gas channeling plugging strategy chart was obtained.The results showed that hydrocarbon gas flooding was classified as immiscible flooding,the main factors affecting gas channeling were formation dip angle,reservoir thickness and source direction,the main factors affecting gas channeling were gas injection intensity and injector-producer distance,and the main factors affecting hydrocarbon gas flooding recovery were permeability difference and gas injection location.The adaptability analysis of dynamic allocation,foam injection and gel injection were conducted.The plugging strategy of dynamic allocation or foam injection was formulated for well groups with favorable source or low injection and high production,foam+gel method was adopted for heterogeneous well groups,and foam or foam+gel method was adopted for fault blocked well groups.
关键词
海上油田/烃气驱/数值模拟/气窜规律/封窜图版Key words
Offshore oilfield/Hydrocarbon gas flooding/Numerical simulation/Gas channeling law/Plugging strategy chart引用本文复制引用
出版年
2024
NETL
NSTL
万方数据