采油速度对油水界面上升和底水锥进的影响

底水锥进和油水界面上升是影响底水油藏开发效果的主要因素。为了研究采油速度对底水锥进和油藏界面上升速度的影响,文中采用油藏工程方法和数值模拟方法对油藏开发过程进行了研究。两种方法的研究结果是一致的：采油速度越高,油井的见水时间就越早,油水界面的上升速度就越快,油井的含水率上升就越快,油井产量的递减速度就越快。同时,井底附近的油水界面上升速度快于外边界处,因此,采油速度是影响油井产水的主要因素。在实际生产中,应选择合理的采油速度,既能满足油藏产能的要求,又要得到最大的采收率,旨在实现最佳的经济效益。

Influence of recovery rate on movement velocity of oil-water contact and bottom-water coning

The bottom-water coning and oil-water contact movement are the main factors which influence the development effect of bottom-water reservoir.In order to analyze the impact of recovery rate on the bottom-water coning and the movement velocity of oilwater contact,this paper adopts the reservoir engineering and numerical simulation method to study the development process.The results of two methods are unanimous.The higher the recovery rate is,the earlier the water breakthrough time comes,and the sooner the movement velocity of oil-water contact and the ascending of the water cut are,then the quicker the decline rate of oil production is.The movement velocity of oil-water contact around the downhole is obviously faster than that at external boundary.Therefore,the oil recovery is the main factor which affects the water production rate and the reasonable recovery rate must be chosen in practice.According to the reasonable recovery rate,the requirement of reservoir deliverability can be met,the maximum recovery factor is also obtained and the optimum economic benefit is achieved.