高含水期扇三角洲油藏基于储层构型的剩余油分布模式研究

Study on remaining oil distribution pattern based on reservoir configuration in fan delta reservoirs in high water-cut period

扇三角洲是我国断陷盆地重要的油藏沉积类型,沉积相带变化快,地质特征复杂。随着油藏水驱开发的深入,剩余油高度分散,油水运动规律认识难度大,挖潜实施效果差异大,剩余油分布模式认识不清。本文以C3断块泰一段3号砂层组油藏为例,通过研究区构型单元垂向和侧向的精细识别,明确了构型单元主要叠置关系,建立了储层构型格架;通过油藏剩余油类型的总结研究,探讨了不同砂体叠置关系下的剩余油富集规律和模式,以期为同类型高含水期油藏剩余油再认识提供指导和借鉴。

Fan delta is an important type of oil reservoir sedimentary in China’s faulted basins,with rapid changes in sedimentary facies and complex geological characteristics.With the deepening of reservoir water-drive development,the remaining oil is highly dispersed,and it is difficult to recognize the laws of oil and water movement.The implementation effect of tapping potential varies greatly,and the understanding of the remaining oil distribution mode is unclear.This article takes the K2t13 oil reservoir in the C3 Fault block as an example,through fine identification of the vertical and lateral configuration units in the study area,the main stacking relationships of the configuration units are clarified,and the reservoir configuration framework is established;though the summary study of the remaining oil type in the reservoirs,the enrichment law and pattern of remaining oil under the stacking relationship of different sand bodies are explored,to provide guidance and reference for the re-understanding of the remaining oil of the same type of oil reservoirs in the high water-cut period.