大庆油田复合驱油技术适应性评价方法研究

对聚合物驱油项目与三元复合驱油项目投资构成进行了对比,借鉴聚合物驱油项目聚合物用量的概念,对三元复合驱化学剂用量定义了"聚合物当量"概念。针对大庆油田具有三元复合驱潜力的储量,分析了在不同的油藏条 件下复合驱项目对注采井距、聚合物当量和油价等的要求。考虑到项目投资对采收率指标的影响,测评了油价,按照收支平衡原则,将总投资折算为需要的增油量下限值,进而确定出需要提高的采收率下限,建立了复合驱油技术的油藏适应性经济评价模型。该模型可用于评价复合驱项目方案。

Evaluation method for adaptability of alkali-surfactant-polymer flooding technology in Daqing Oilfield

The investment of alkali-surfactant-polymer (ASP) flooding project was analyzed and compared with the polymer flooding project. According to the concept of polymer amount used in the polymer flooding project, a new concept of polymer equivalent was defined for the agent amount of ASP flooding. For the reservoirs are potentially recovered by ASP flooding, the requirments of ASP flooding projects for injector producer distance, polymer equivalent and oil price in different reservoir conditions are analyzed. When the aggregate investment was reduced to the needed increasing oil production under the standard oil price, the lower limit of enhanced oil recovery could be obtained. The comprehensive evaluation model for the reservoir adaptability of ASP flooding technology was economically established. This model is simple and credible for evaluating the development plan of ASP flooding project.