文昌13-1-A9井酸化后含水上升分析及预测

文昌13-1-A9井酸化后综合含水达到54%,综合地质资料和油藏生产动态分析认为,导致文昌13-1-A9井酸化后含水上升加快的主要因素有:油水边界上升加快;酸化后渗透率提高,使油层与水体连通能力增强,加剧了边水的突进速度;酸化后采液指数提高,压降增大,导致底水锥进;油井位于油水过渡带内。在分析含水上升原因的基础上利用logistic模型对含水进行了预测,预测结果认为到2008年含水将达到80%以上。

Analysis and Forecast of the Water-cut Increasing After Acidizing in Well Wenchang 13-1-A9

After acidizing, the water cut of well Wenchang 13-1-A9 is up to 54%. According to analysing the geologic and reservoir dynamic data, it is shown that there are three reasons which caused the rising of the water-cut. The first one is quick rising of the Oil-water interface. The second reason is the permeability is increased which improved the connectivity between the production layer and aquifer and accelerated the onrush of edge water. The third reason is the increase of fluid productivity index, which cause the pressure decreasing and bottom water coning. Beside of that, the well is located in the transitional zone of oil-water. Based on the analyzing the reasons, the increase rule of water-cut in 13-1-A9 is forecasted by using the Logistic Model, the result show that water-cut of 13-1-A9 would be up to 80% in 2008.