天然能量水体评价方法及实例应用

Evaluation method and application of naturel energy water volumetric

目前油藏天然能量评价用无因次弹性产量比和采出1%地质储量的地层压降2个指标把天然能量大小划分为:天然能量充足、天然能量比较充足、天然能量不足、天然能量微弱4个级别。但是在矿场应用中,采用水体倍数表征油藏天然能量,缺少天然能量大小4个级别与水体倍数的对应关系。因此,本文用实际油田基本参数建立机理模型,应用数值模拟方法,设置不同水体倍数,建立了判断天然能量大小4个级别与水体倍数的对应关系图版。该图版可以评价实际油田天然能量大小,从而确定油田注水时机和开发策略,指导油田高效开发。

At present, the reservoir naturel energy evaluation using dimensionless elastic production ratio and the pressure drop per recovery of reservoir reserve divides naturel energy into four levels, sufficient, relatively sufficient, insufficient and week. However, in application, water volumetric multiple are used to represent natural energy, there is no corresponding relationship between the four levels and water volumetric multiple. Therefore, this essay establishes a mechanism model based on actual oilfield basic parameters, using numerical simulation method and setting different water volumetric multiple to establish the corresponding relation chart between the four levels of naturel energy and water volumetric multiple. The naturel energy water volumetric of the oilfield is evaluated according to the chart, so as to determine the water injection timing and development strategy and exploit the oilfield in an efficient way.