页岩流体参数核磁共振实验研究

Experimental Study on Fluid Parameters of Shale Fluid

以低磁场核磁共振岩心分析技术为主,系统研究了JY2井9块页岩岩心核磁共振T2谱响应特征、可动流体T2截止值、可动流体饱和度影响因素以及页岩核磁孔隙度与常规孔隙度的差异。实验结果表明,页岩核磁共振T2谱呈左右峰连续分布的双峰;可动流体T2截止值平均为6.90ms,小于致密砂岩储层的T2截止值,可动流体饱和度与页岩孔隙度渗透率相关性较差,以及核磁孔隙度与气测孔隙度的差异。

In this paper,the core magnetic resonance T2 spectrum response characteristics of 9 shale cores in JY2 well,the T2 cutoff value of movable fluid,the influencing factors of movable fluid saturation and the porosity of the shale are studied systematically.Degree and Conventional Porosity.The experimental results show that the T2 NMR of the shale is the double peak of the left and right peaks.The T2 cutoff value of the movable fluid is 6.90 ms,which is smaller than the T2 cutoff value of the compact sandstone reservoir,the fluid saturation and shale porosity Permeability correlation is poor,and the difference between nuclear magnetic porosity and gas measurement porosity.