粘土矿物对储层饱和度实验结果的影响及解决方法探讨

The influence and solution of clay minerals on the experimental results of reservoir saturation

粘土矿物由于其特殊的组成和结构在加热过程中其晶间水极易脱出,使得最经典的常规抽提法饱和度分析数据出现偏差,造成水饱和度测定值偏高、油气饱和度测定值偏低问题出现,影响到对储层含油性的判断,并最终影响到区块储量计算等工作。针对这一问题本文从粘土矿物特性、常规抽提法饱和度分析方法入手对造成这一问题的原因进行分析,提出解决方法并通过80井区的饱和度校正实例进行验证。

Because of its special composition and structure,the intercrystalline water of clay minerals is easy to come out during the heating process,which makes the most classical conventional extraction method deviate from the saturation analysis data,resulting in the problems of high water saturation and low oil and gas saturation,affecting the judgement of reservoir oil-bearing property and ultimately affecting the calculation of block reserves.Based on the characteristics of clay minerals and the saturation analysis method of conventional extraction method,the causes of this problem are analyzed,and the solutions are put forward and verified by the saturation correction example of 80 well area.