Nuclear spin-lattice magnetic relaxation of alkanes and water in a porous medium of clay minerals
The molecular mobility of liquid in porous media studies are related to understand fundamental and practical issues. Fundamental issues include the pore space geometric and transport characteristics, the interaction between liquid and the solid phase surface. Practical issues include oil and gas migration, the impact of clay on reservoir capacity and permeability, estimation of reserves and oil production, and others. The nuclear magnetic resonance method, in particular, spin-lattice nuclear magnetic relaxation of a liquid in liquid-porous medium systems helps to get answers to the listed questions. Information is obtained on both molecular state of fluids and porous medium structure. The initial quantitative parameters in such studies are the times of nuclear magnetic relaxation. As a rule, the dependencies of relaxation times have a complex, non-exponential form and are interpreted in different ways by different authors. The purpose of the work is clarification the features of spin-lattice relaxation of model liquids in clay minerals porous media - kaolinite and montmorillonite by the method of pulsed nuclear magnetic resonance.