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对于进入中后期阶段的油田,需要通过增产措施来提高油井的产量,但油井措施有效井次和措施增油量之间存在着一定的不均衡性。采用经济学中用于测定和描述不均衡性的洛伦兹曲线和基尼系数的分析方法,结合某油田开发数据的实例,对措施有效井次和措施增油量的不均衡程度进行了分析。在以单井次平均增油量分组的基础上,根据油田措施有效井次和措施增油量计算的百分数和累计百分数,采用3种不同的方法计算其基尼系数,得出的结论为:措施有效井次和措施增油量之间存在不均衡性,即比重较大的措施井次只能提供占总数比重很少的措施增油量,或占总体比重较小的措施井次提供了较大比重的措施增油量;不同方法算出的基尼系数结果大致相同。据此,油田可以进一步研究措施增油量大的井的地质结构、措施类型、作业方式等,以达到提高措施作业经济效益的目的。
For the oilfields entering the middle and later stages, it is necessary to increase the production of oil wells by increasing production measures. However, there is a certain imbalance between the effective wells and the amount of oil added. Based on the analysis method of Lorentz curve and Gini coefficient used to measure and describe the imbalance in economics, and combining with the data of some oilfield development, the paper analyzes the degree of inefficiency of measure effective well and measure oil increase. Based on the grouping of single-well average oil increment, three different methods were used to calculate the Gini coefficient based on the effective well measures and the cumulative percentage of oil-field measures, and the conclusions were: Measures There is an imbalance between the effective wells and the measure of increasing oil yield, that is, the proportion of the larger proportion of wells can only provide measures to increase the amount of oil that accounts for a small proportion of the total amount, or the total number of measures Large proportion of measures to increase oil; calculated by different methods Gini coefficient results are about the same. Accordingly, the oilfield can further study the geological structure, types of measures and operation methods of well with large amount of oil so as to achieve the purpose of improving the economic benefits of operation.