Channel: EXPERT INSIGHTS https://www.ljgczz.com EN-US https://www.ljgczz.com/EN/current.shtml https://www.ljgczz.com 5 r values锛� of NMR porosity and core lab determining porosity, NMR permeability and core lab determining permeability are 0.99 and 0.86, respectively. For rock cuttings with the same interval and different particle diameters, NMR porosities and core lab determining porosities, NMR permeabilities and core lab determining permeabilities are compared. As the particle diameters of rock cuttings decrease, the correlation coefficients 锛�r values锛� decrease and the correlations become worse. For the particle diameters of rock cuttings are not less than 3 mm, the correlation coefficients 锛�r values锛� between NMR porosities and core lab determining porosities are not less than 0.90, the correlation coefficient 锛�r values 锛� between NMR permeabilities and core lab determining permeabilities are not less than 0.73. The results show that the particle diameters of PDC bit cuttings in mud logging site can also meet the application of NMR logging technology.]]>