油田生产制度改变时产液量变化规律预测

为了进一步提高油田产液量变化规律的预测精度,推导了油田在不同生产制度下年产液量的计算公式。定产油量或产油量以一定速度递减时的数学模型与甲型和丙型水驱特征曲线表达式进行联立求解,得到了不同生产制度下年产液量的计算公式。以大庆油田的某一水驱开发区块为例,对推导出的年产液量计算公式进行验证,并对该区块不同生产制度下的年产液量进行了计算。结果表明:所推导出的年产液量计算公式的计算精度能满足工程要求;该区块的最佳生产制度是年产油量以3%的速度递减。根据年产液量计算公式预测的不同生产制度下的年产液量,并结合油田(区块)的产液能力和生产历史情况,可以制定油田(区块)的最佳生产制度。 

Regularity Forecast for Liquid Production Change when Changing Production Parameters

In order to further improve the forecast accuracy of liquid production variation,the calculation formula for annual liquid production was derived with different production parameters.Based on mathematical models for fixed oil production or production decline at a certain speed,combined with conventional A and C water flooding performance curves,liquid production under different production parameters can be calculated by simultaneous solution.Taking a water flood development block in Daqing Oilfield as an example,the derived formula of liquid production was verified with different production parameters of this block,and the annual liquid production of this block was calculated.The results show that the formula of liquid production can meet engineering requirement,and the best rate of decline for crude oil production should be 3% in light of liquid production capacity in the block.According to liquid production under different production parameters obtained from the liquid production formula,combined with the liquid production capacity of the oilfield or block and production history,the best production parameters for this oilfield can be selected.