Method for measuring content of different state water in coal

A state, content technology, applied in the direction of analysis by nuclear magnetic resonance, etc., to achieve the effect of easy operation
CN102944571AInactive Publication Date: 2013-02-27CHINA UNIV OF GEOSCIENCES (BEIJING)
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA UNIV OF GEOSCIENCES (BEIJING)
Publication Date
2013-02-27
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses a method for measuring the content of different state water in coal. The method comprises the steps of performing low field nuclear magnetic resonance measurement on a saturated coal sample to obtain a transverse relaxation time T2 spectrum of the saturated coal sample, calculating integral areas of the T2 spectrum of each spectral unit volume saturated coal sample; and conversing the integral areas of the T2 spectrum of each spectral unit volume saturated coal sample to the volume percent of the different state water according to obtained conversion modes established by preset standard samples. The method solves the problem that how to measure the content of different state water in the coal.
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Description

technical field

[0001] The invention relates to the field of measuring the water content characteristics of coal reservoirs, in particular to a method for measuring the water content in different states in coal. Background technique

[0002] Water in coal reservoirs has diverse storage and migration patterns, which have different meanings for coalbed methane exploitation. The water in coal not only affects the adsorption, desorption and production of methane in coal, but also affects the decision-making of engineering measures in the process of coalbed methane development.

[0003] In conventional coal industry analysis, the moisture in coal is divided into extrinsic moisture and intrinsic moisture. Extrinsic moisture is the water that exists on the surface of coal particles, coal particle cracks and non-capillary cavities, and intrinsic moisture is the water that exists in the capillary pores of coal. However, in actual measurement, it is difficult to strictly separate the...

Claims

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