核磁共振岩石物理实验及在D区测井评价中的应用

主要介绍了核磁共振岩石物理实验的目的、仪器特点、分析方法,并用23块岩心样品包括粉砂岩、泥质粉砂岩进行分析。分析结果表明,岩心分析技术在孔隙度分析、渗透率求取、T_2截止值确定等方面具有突出的优势,所测23块岩样的可动流体T_2截止值分布在6.46～16.80 ms之间,平均值为10.75 ms,和理论值33 ms相比有明显差异。利用实验结果在D区低孔、低渗储层上进行了实际应用,取得了满意的效果。

Petrophysics experiment with nuclear magnetic resonance and its application in logging evaluation at D block

The objective,the character of equipment and the analy- sis method of the petrophysics experirnent with nuclear mag- netic resonance(NMR)are introduced.Twenty-three core samples including siltstone and pelitic siltstone were ana- lyzed.Results show that the core analysis technology is ad- vantageous in porosity analysis,calculating permeability, fixing the cutoff value of T_2.The cutoff value of T_2 of move- able fluid in the measuring twenty-three samples is 6.46 16.8 ms with the mean value as 10.75 ms,which is obvious- ly different from the theoretical value 33 ms.The experi- mental results are utilized to apply in D block where reser- voirs are low in porosity and permeability,and a satisfying effect is obtained.