【摘要】 复杂断块油藏在我国广泛分布,地位重要,但其油气分布复杂、开发调整难度较高。为探讨此类油藏调整思路,以柴达木盆地砂西N1—N21复杂断块油藏为例,采用以构造为核心的油藏精细描述,通过应力分析确定油藏构造格局、多方法联合精细地震解释和成图较好地体现了油藏构造特征。以油砂体预测为核心的油藏评价,通过沉积相研究预测砂体分布,基于构造格架以断块为单元预测油砂体分布,进而以油砂体为单元进行油藏评价。以增加动用程度、完善注采关系,特别是以主力小层的注采完善为核心的油藏开发调整方向,适应于该类油藏的特点,为稳定油藏产量,提高采收率指明了方向。更多还原

【Abstract】 Complex fault-block oil reservoirs are very common in China and they play a very important role in the petroleum production.It is very difficult for this kind of reservoir to develop because of its complex oil and water distribution.In order to get a good adjustment method,Shaxi N1-N21 complex fault-block oil reservoirs in Qaidam Basin were studied.A series of thoughtways focusing on the faults were developed for the fault-block oil reservoirs.Reservoir tectonics were characterized through the structural stress analysis and detailed structure mapping,oil-bearing sand bodies distribution were predicted and evaluated based on the facies analysis and fault block analysis.The adjustment methods were discussed to increase the exploitation degree and improve the injection-production relationship,especially for the main layers.A good foundation was provided for the reservoir development and the direction of improving the oil recovery was made clear.更多还原