摘要
水驱图版是一种重要的油藏工程方法,常用于分析水驱油藏的含水上升规律,评价水驱开发调整效果和预测采收率。目前国内应用比较广泛的童氏图版及其改进水驱图版初期含水率较高,预测采收率偏大,不能适应注水开发油藏特别是低渗透注水开发油藏开发全过程水驱开发效果评价的需要。本文基于油水两相渗流理论,利用相对渗透率资料,推导并提出了一种水驱规律预测模型。在此基础上,建立了一种新型水驱图版。研究和实例应用表明,新型水驱图版客观描述了注水开发油藏开采全过程的含水与采出程度变化规律,可靠性强,适用范围广,对水驱规律和采收率的预测更加客观、准确。
Water-drive plate is an important reservoir engineering method which is usually used to analyze the water cut rising rules of water-flooding reservoirs, evaluate the water-drive development adjustment effect and recovery factor.The initial water cut and ultimate recovery factor predicted by the existing Tong's plate used broadly in our country and other it's modified water-drive plate are generally higher, These water-drive plates have been unsuitable for development evaluation for the water-flooding reservoir in the whole course of oilfield development, especially for low permeability water-flooding reservoirs.In this paper, a new predicition model of water-flooding law and water-drive plate is established based on oil-water fluid flow theory and relative permeability data. Study and the field application shows that this new water-drive plate can describe the variation law of water cut with recovery degree for the water-flooding reservoirs in the whole development course, it has high reliability and widely application scope, and predicted water-flooding law and recovery factor is more objective and accurate.
引文
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