海外油气储量评估方法研究

Study on the evaluation method of overseas oil-gas reserves

海外油气项目储量评估是油气资产价值评估的核心,按油气田静态与动态资料的丰富程度,划分为新油气田和老油气田两种类型进行油气储量估算。估算油气田原始地质储量常用静态法,包括容积法、建模法和概率法。估算可采储量主要用经验公式法或动态法。对于新油气田可采储量评估主要采用经验公式法、经验取值法、数值模拟法和类比法。对于老油田可采储量评估常用动态法,包括产量递减法、物质平衡法、水驱特征曲线法。

Oil - gas reserve evaluation is the core of the oilfield asset evaluation. The oilfields are classifed as green field and brown field based on the volume of static and dynamic data. The static methods including the volumetric method, the static model,and the probabilistic method, are usually used to estimate the original oil in place （OOIP） or gas initially in place （GIIP）. The dynamic or empirical formulas are usually used in calculating the recoverable reserves. The empiri- cal formula, the empirical table, the reservoir simulation, and the analogue technique ale often used in estimating the green field reserve. The dynamic methods such as the production declining, the material balance, the water - driving characteris- tic curves, are used in the brown field reserve calculations. The right method should be used in right field to do the correct asset evaluation.