摘要
在研究区(安塞油田底水油藏)历年开发实践的基础上,讨论了油藏底水发育情况、隔夹层分布特征,系统地分析了底水和隔夹层分布特征对开发效果的影响,并对油藏开发过程中的油水界面和剩余油分布进行研究。结果表明:研究区底水发育特征为"西强东弱",而隔夹层呈"东强西弱"分布特征;在底水发育区,隔层位于油水界面之下,对油水界面的抬升没有明显的抑制作用,而主力油层层内夹层对底水锥进有抑制作用,作用时效与其位置、半径和开采速度有关。长期开发使得油水界面上升,但受夹层抑制作用和开采强度影响单井上升速度不同,无统一的油水界面,纵向上剩余油分布不均。
Based on the exploration of the studied area in Ansai Oilfield,the development of bottom water in the reservoir and the distribution characteristics of barriers were discussed,the influence of bottom water and barrier on exploration effect was systematically analyzed. The distribution of residual oil and oil-water interface were also investigated systematically. The results indicate that bottom water growes stronger in the west of the studied area than in the east,whereas the barriers present the contrary characteristics. The barriers between layers are located under the oil-water interface,which has insignificant effect on elimination of bottom-water coning. Therefore,the oil-water interface is raised at the different speeds of different wells,which leads to no uniform oil-water interface and the distribution of residual oil among different layers is uneven.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2010年第4期181-184,共4页
Journal of Oil and Gas Technology
关键词
安塞油田
底水油藏
隔夹层
油水界面
Ansai Oilfield
bottom water reservoir
barrier
oil-water interface
