Nuclear magnetic resonance quantitative analysis method for rock micro-crack damage variable

Abstract

A nuclear magnetic resonance quantitative analysis method for a rock micro-crack damage variable is provided; firstly, a sample is processed, the sample is soaked in distilled water, then nuclear magnetic resonance detection is carried out, CPMG pulse sequence detection is carried out on the sample, a spin echo train attenuated signal is obtained, the spin echo train attenuated signal is subjected to inversion, and a T2 spectrum distribution diagram and a spectral area value are obtained; a corresponding relation of the relaxation time T2 and the pore size r is analyzed; according to a fact that the spectral peak area is proportional to the micro-fracture pore number, a rock damage variable formula characterized by the nuclear magnetic resonance transverse relaxation time T2 spectra is established, and the quantitative analysis method is provided for identification of damage of rock materials.

Description

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AI Technical Summary

Benefits of technology

This patented technology helps identify rocks that are damaged more accurately than previously possible through its ability to measure changes over time caused by external factors like radiation or other environmental influences on them during their life cycle.

Problems solved by technology

The technical problem addressed in this patents relates to understanding how cracks occur during drilling operations when they are caused by external factors like impact or corrosion. This knowledge will help us better design oil wellbores based upon specific conditions such as stress levels, temperature changes, and other environmental variables.

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