提捞试采动态预测模型及在储量评价中的应用

为了实现大庆外围油田未动用储量的有效开发,近年来创新出一套勘探开发一体化的单井评价技术和开发模式.提捞试采作为单井评价模式中的一项重要技术,主要从动态角度对油藏作出评价.利用提捞试采过程中录取的提捞液量、液面等资料,依据渗流力学原理,建立了油井试采过程中原油从油藏流向井筒和从井筒流向地面的常微分方程组,并给出了解析解.证明出油井关井恢复期间地下产量变化服从指数递减规律.建立了基于试采资料计算地质储量的方法并给出了实例,解决了试采过程中没有地层压力资料,运用传统的物质平衡法难以进行储量评价的问题.

Dynamic prediction model of bailing production test and application in reserves evaluation

In order to develop un-produced reserves effectively in Daqing periphery oilfield, a set of single evaluation technique and development methods with an integration of exploration and development are created. Bailing production test is a key technique in single well evaluation method mainly evaluates from dynamics. Base on fluid rate, fluid level data during bailing, normal differential equation sets describing reservoir and wellbore flow are built, its analytic solution are given. Production rate is submitted to exponential decline. Its result can be used to determine bailing cycle and calculate after flow rate. Original oil in place is calculated. The result is identical to those of mass balance method. This method solves the problem that reserves is difficult to evaluate without formation pressure during production testing oeriod.