采油工艺措施效果经济评价方法

评价油井增产措施的经济效益的前提是正确区分和计算费用和效益，原则是以增量分析为主，兼顾总量指标，增量操作成本包含与增产措施直接相关的操作费用和增量井下作业费用。措施有效期在1a内的措施宜采用静态法，按费用处理，措施投入计入井下作业费，评价指标包括增量利润、增量净利润和利润全投入比；跨年有效的措施宜采用动态法，按投资处理，评价指标包括增量投资利润率、增量财务净现值、增量财务净现值率。用该方法评价某油田压裂、堵水、换大泵等增产措施的经济效益，评价结果与实际生产一致。表2参5

Methodology of economic evaluation of stimu-lation treatment

For evaluating economic benefit of stimulation treatment reasonably, to distinguish and calculate the expense and benefit properly should be a premise. The incremental analysis is considered and the attention must be given to the total evaluation index, and the incremental operation cost only contains the payments and downhole operating expenditure that is connected to the stimulation treatment directly. The treatments more than one year validity is evaluated with the dynamic method, however, the ones less than one year validity are suitable with the static method. For static method, the cost is dealt with payment, the treatment input is considered as downhole operating expenditure, the evaluation indexes are the incremental profit, incremental net profit and profit ratio. For dynamic method, the cost is dealt with investments; the indexes are composed of the incremental profit ratio of investment, the incremental financial net present value and the ratio of incremental financial net present value ratio. The benefits of several stimulation treatments are calculated, such as hydraulic fracturing, water shutoff, and pump change. The results show that the methodology of economic evaluation of stimulation treatment can reflect the economic benefit of stimulation treatments.