产量分成模式开发油田的合理井网密度确定

Method to Calculate Reasonable Well Patterm Density for Oilfield Adopting Production Sharing Mode

对于采用产量分成模式开发的油田,现有井网密度计算方法不适用。针对这一问题,根据产量分成合同的特点,利用投入和产出的平衡关系,建立了该类油田的合理井网密度计算方法。通过分析总利润随井网密度变化的特征,研究了典型区块A的合理井网密度与分成比例及油价的关系。合理井网密度与成本回收前的分成比例及油价正相关,分成比例越大,油价越高,合理井网密度越大,同时通过计算A区块的最小分成比例和最低油价,进行了投资风险分析。最后综合考虑技术、经济因素,确定了A区块的合理井网密度。实施效果表明,新方法可用于此类区块的合理井网密度确定,指导油田开发井位部署。

For the oilfields developed with the method of production sharing mode,the existed calculation method of well spacing density was not suitable for its calculation.In allusion to the problem and the characteristics of a production sharing contract,a method to calculate reasonable well spacing density was established by using the equilibrium relationship of input and output.In the typical Block A,the relationship between the reasonable well spacing density,sharing proportionality and oil price was researched by analyzing the features of total benefit changing with the well spacing density.The reasonable spacing density was in proportional with sharing and oil price before recovery,the bigger the proportion was,the higher the oil price was,the bigger the well spacing density would be.At the same time,the minimum sharing and oil price in Block A were calculated,the risk of investment was analyzed.Eventually technical and economic factors are taken into consideration,and reasonable well spacing density is determined in Block A.The result shows that the new method can be used for determining the reasonable well spacing density and deploying well location in the blocks of the same kind.