摘要
塔河油田奥陶系油藏为典型缝洞型油藏,储层非均质性强烈,油藏出水特征及油水关系十分复杂,油井出水导致的产量下降已成为影响油田开发效果的重要因素。为此,以塔河12区AD23井区为例,在井区连通性分析的基础上对油水关系进行探讨,认为连通的井组中处于缝洞体低部位的井和投产时间较早的井见水较快,而彼此不连通的井出水主要由井孔储层位置的高低决定,井孔储层位置较低的井不但投产见水快,能量不足时采取注水替油措施效果也较差。
The Ordovician reservoirs in Tahe oilfield are not only typical fractured-cavity ones but also featured by strong heterogeneity. So, the water-producing characteristics and oil-water relationship are complicated. Water production results in a decline of oil production, which becomes an important factor affecting development effect. Therefore, taking AD23 well block, 12 area of Tahe oilfield as an example, the oil-water relationship is explored based on connectivity analysis of AD23. This study believes that among the connected well group, water breakthrough comes quicker in the wells that are located in the low of cave-cleft system or have been put into production early, while the water production from unconnected wells depends on the reservoir height in borehole. For the wells which have a lower reservoir location in borehole, water breakthrough not only comes quick when being put into production, but also the effects of displacing oil by water injection are poor when the reservoir is deficient in energy.
出处
《天然气技术》
2010年第5期22-24,77-78,共3页
NATURAL GAS TECHNOLOGY
关键词
塔河油田
连通性
非均质性
油水关系
Tahe oilfield, connectivity, heterogeneity, oil-water relationship
