论文部分内容阅读
从断层封闭性和物性差异两方面分析了五砂组存在的“高部位含水、底部位含油”特殊地质现象。研究表明,特殊地质现象是由于物性差异所造成的;通过聚类分析将五砂组划分为A、B、C、D四类流动单元,不同流动单元单独驱替时,物性好的流动单元驱油效率低,物性差的流动单元驱油效率高,并联组合后,物性好的流动单元驱油效果比单独驱替时高,物性差的流动单元驱油效果比单独驱替时差,因此采用多层合注合采开发时,前期低渗透层采出程度相对较差,在开发后期应重点挖潜较低渗透层,提高低渗透层注水利用率。五砂组部分油井不压裂即有产能,流动单元B+C并联组合有明显的产油优势,在储层不压裂细分开采时应该优先考虑。
From the fault sealing and physical differences between the two groups analyzed the existence of the “sand” high position of the water, the bottom of the oil-bearing "special geological phenomenon. The study shows that the special geological phenomenon is caused by the difference of physical properties. The five sand groups are divided into four types of flow units A, B, C and D by cluster analysis. When different flow units are flooded separately, The oil displacement efficiency of the mobile units with low oil efficiency and poor physical properties is high. When the parallel combination is used, the flooding effect of the mobile units with good physical properties is higher than that of the flooded units with low physical efficiency. When the stratified injection is adopted and exploited, the pre-mature low-permeability layer is relatively poorly developed. In the late stage of development, the lower-permeability layer should be tapped to improve the water-injection efficiency of the low-permeability layer. Some wells in the Wusha Formation are capable of producing without fracturing, and the combination of flow cells B + C in parallel has obvious oil production advantages and should be given priority when fracturing the reservoir is not fractured.