基于核磁共振技术的储层含油饱和度参数综合测试方法

Comprehensive Testing Method for Oil Saturation Parameters in Reservoirs Based on NMR Technology

含油饱和度是储层评价的一个重要参数,各类含油饱和度参数的准确测试是储层评价的基础。为了综合性分析储层各类含油饱和度参数,基于核磁共振技术,进行了核磁共振三次测量实验、油驱水和水驱油离心实验,得到了同一块岩样各类含油饱和度参数的准确值,包括原始含油饱和度、剩余油饱和度、可动油饱和度、剩余可动油饱和度等。实验结果表明,23块岩样的原始含油饱和度平均值为70.16%,可动油饱和度平均值为41.49%,剩余油饱和度平均值为52.97%,剩余可动油饱和度平均值为24.30%。说明该储层原始含油饱和度较高,储层含油性较好,储层原油可动用性很好,剩余油挖潜潜力较大。各类含油饱和度参数的综合测试方法的提出,改变了之前把这些含油饱和度参数单独测试分析的现状,为油田剩余油的挖潜和制定下一步的开发措施提供了理论基础。

The oil saturation is one of the important parameters in reservoir evaluation. The accurate test of various oil saturation parameters is the basis of formation evaluation. In order to analyze the oil saturation parameters comprehensively, three times NMR testing experiments, oil driving and water driving centrifugal experiments have conducted based on NMR technology. Through these experiments, the value of original oil saturation, remaining oil saturation, movable oil saturation and remaining movable saturation of one same sample have got. The result is that, the average of original oil saturation, movable oil saturation, remaining oil saturation and remaining movable saturation is 70. 16% ,41.49% ,52.9% ,24. 30% respectively. The results illustrate that the original oil saturation is high and the movability of oil is well. So the tapping potential of remaining oil is great. The proposal of compre- hensive testing method for the parameters has changed the former method that testing those parameters separately, providing theoretical basis of tapping the remaining and developing the next step production measures for the oilfield.