确定溶解气驱油藏地层压力的简便方法

传统的油藏工程方法中利用物质平衡法估算地层压力，通常在PVT资料已知的条件下进行。对于PVT资料未知的油藏，只能借助于压力恢复等方法来确定地层压力。现在以物质平衡方程为基础，结合确定地展流体物性参数的经验公式，建立一种利用累积产油量、累积产气量及相关地层流体物性参数即可确定溶解气驱油藏地层压力的新模型，同时给出了模型的求解方法及步骤。该模型适用于无边、底水的溶解气驱油藏。经实例验证表明，此方法具有简单、方便的特点。

A Simple Method to Determine Formation Pressure of Solution Gas Drive Reservoir

In the conventional reservoir engineering,using material balance method to evaluate formation pressure is usually made when PVT data are already known. To the reservoir without PVT in formation,formation pressure can only be determined with the aid of pressure buildup and other methods. Now, on the basis of material balance equation,combined with the empirical formula to determine physical parameters of formation fluids,a new model to determine formation pressure in solution gas drive reservoir using cumulative oil recovered, cumulative gas production and corresponding formation fluid properties is created,and solution procedure of the model is also given. This model is applicable to solution gas drive reservoir without edge and bottom water. The verification with work examples indicates that this method has the feature of easy and simple operation.