油水二次富集影响因素分析与预测模型

Influence factors analysis and prediction model of secondary accumulation of oil and water

马康 张荣达 唐力辉 王浩 李俊键 姜汉桥 2

中国石油大学（北京）油气资源与探测国家重点实验室，北京　102249 中国石油大学（北京）石油工程学院，北京　102249

State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing 102249, China China University of Petroleum (Beijing), Institute of Petroleum Engineering, Beijing 102249, China

我国东部的断块油藏部分已经达到极限含水率的生产井，由于失去开采价值，可以采用长时间关井的方法使油水二次富集，一段时间后再开井生产，使含水率降低并在一定程度上恢复油井产能，但针对不同的储层条件，油水二次富集的效果还需要进一步分析。文中利用数值模拟的方法建立符合断块油藏特征的地质模型，对关井时间、地层倾角、原油黏度、渗透率及毛细管压力对油水二次富集的影响效果进行了模拟，并利用多元回归的方法对模拟结果进行了分析。利用回归公式得出不同储层油水二次富集后的含水率变化情况，可以以此为基础对油水二次富集效果进行预测。

Due to the fault block reservoir in eastern China has reached the production limit, part of water-containing wells were lost mining value and shut down. The method of shutting down the well for a long time could be promoted the secondary enrichment of oil and water, which the water content is reduced and the well productivity is restored to some extent. So it should further analyzed the effect of secondary enrichment of oil and water under the different reservoir condition. In this paper, a numerical simulation method is used to establish a geological model consistent with the characteristics of fault-block reservoirs. The effects of permeability, crude oil viscosity, formation dip angle and capillary force on oil-water secondary enrichment are simulated, and multiple regression methods are used to analyze simulation results. According to the regression formula, the change of water content can be obtained after oil and water enriched in different reservoirs for a period of time. Based on this, the effect of the secondary enrichment of oil and water can be predicted.

10.6056/dkyqt202002015