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通常 ,对于可采储量采出程度大于 5 0 %开发到中后期的油藏 ,累积产油量与累积生产气油比之间一般存在线形关系。当累积产油量等于原油可采储量时 ,对应的累积生产气油比与原油可采储量的乘积 ,即为溶解气可采储量。值得注意的是 ,计算时必须遵循每一时刻瞬时生产气油比都大于或等于零的基本原则 ,在这一基本原则指导下 ,给出了预测最终累积生产气油比时直线外推的范围 ,以及在不同范围溶解气可采储量相应的计算公式。
In general, there is a generally linear relationship between cumulative oil production and cumulative gas-oil production ratio for reservoirs that have recoverable reserves of more than 50% developed into the middle and late stages. When the cumulative oil production is equal to the recoverable reserves of crude oil, the product of the corresponding cumulative production of gas-oil ratio and recoverable reserves of crude oil is the recoverable reserves of dissolved gases. It is noteworthy that the basic principle of instantaneous gas-oil production ratio greater than or equal to zero at every moment must be followed. Under the guidance of this basic principle, the range of straight-line extrapolation when forecasting the final accumulated gas-oil ratio is given, As well as in different areas dissolved gas recoverable reserves corresponding formula.