预测油气藏可采储量的一种简易方法

A simple method for predicting recoverable reserves of reservoir

研究提出了一种新的产量递减率微分方程,这个方程与J J阿尔普斯的递减率微分方程在形式上是不同的,并由此推导出了一种油气藏可采储量预测方法。方法的实质是:油气藏产量出现递减之后,年产油量的平方根与累计产油量在直角坐标中是一条下降的直线。根据该直线和废弃年产油量可以预测油气藏的剩余可采储量,将预测的数值加上递减时的累积采油量,便得到油气田的可采储量。该方法简单实用,可以作为标定油气藏可采储量的一种有效方法。文中用较多的油田开发实例证实了上述理论方法的可靠性与实用性。

This paper proposes a new differential equation for production declining rate, which has different form from differential equation of J. J. Alpes, and derives a method for predicting recoverable reserves of reservoir. The substance of this method is that, when oil and gas production starts declining, square root of annual oil production and accumulated oil production is a declining straight line in rectangular coordinate. Using this straight line and abandoned annual oil production can predict remained recoverable reserves of reservoir. Adding predicted value to accumulated oil production in declining period can obtain recoverable reserves of oilfield. This simple method can be used as an effective method to calibrate recoverable reserves of reservoir. This paper gives several cases to prove the reliability and feasibility of this method.