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Application Of Core Nuclear Magnetic Resonance
Sep 22, 2017

Core magnetic resonance is a multi-functional high-performance nuclear magnetic equipment, can simulate the stratigraphic environment to rock samples to impose axial pressure, Rock Core NMR & MRI confining pressure and temperature conditions, can achieve oil flooding, water flooding and gas drive experiments, the real simulation of geo-mining environment.

Systematic study of dense shale reservoir NMR response characteristics is an important basis for the application of nuclear magnetic resonance technology to the development of such oil and gas resources. The nuclear magnetic resonance response characteristics, magnetic field porosity, tangential fluid T2 cutoff and rock specific surface distribution were studied by using NMR, gas centrifugation and other experimental techniques. The results show that the shale T2 spectrum can be divided into three types, namely, the unimodal T2 spectrum, the double peak T2 spectrum with isolated right peak and the bimodal T2 spectrum of the left and right peak distribution, Rock Core NMR & MRI the vast majority of shale The relaxation time is less than 10ms, and the fracture pores in the reservoir account for about 9.16% of the total pore space. The lithospheric surface calculated based on the NMR T2 spectrum is mainly distributed at 3.59-80.51 μm-1. Shale magnetic porosity is generally less than the measured porosity, the average error is about 22.33%, and clay pore, fracture pore development and other factors. The results show that the T2 cutoff value of the core NMR magnetic fluid is 3.87-16.68ms, the average is 8.29ms, Rock Core NMR & MRI and the average free gas saturation of the rock mass is about 9.72%.

Core NMR Applications:

Development test and indoor core analysis

Core NMR function:

1, oil content of water content detection;

2, water phase quantitative analysis;

3, T2 *, T2, T1 relaxation time analysis;

4, proton density, T2 - weighted, T1 - weighted imaging

5, spatial distribution of water analysis;

6, porous media physical evaluation.

Core nuclear magnetic resonance

a, two-dimensional imaging at any level

b, multi-level two-dimensional imaging

c, pore imaging observation

d, Rock Core NMR & MRI moisture content distribution rheological imaging observation

e, high pressure displacement environment fluid distribution changes in two-dimensional imaging

Analysis of Core Drilling and Shaft Wall Coring in Core Nuclear Magnetic Resonance Field

1, nuclear magnetic cuttings logging analysis

2, Rock Core NMR & MRI lithologic logging reservoir evaluation, reduce the amount of heart, greatly increasing the reservoir geological information. Real-time access to reservoir geological information, to guide the production

3, nuclear magnetic resonance borehole coring analysis

4, to provide mobile water content, quickly determine the flooding situation

Calibration of nuclear magnetic logging scale

Can carry out nuclear magnetic resonance logging scale calibration work, Rock Core NMR & MRI greatly improve the accuracy of nuclear magnetic logging interpretation