NMR measurement of engineered flow management structures

摘要

Nuclear Magnetic Resonance (NMR) measurement apparatus, NMR sensors, NMR measurement methods are disclosed to determine NMR properties of engineered flow management structures, and to estimate engineering properties using determined NMR properties. Example engineered flow management structures include engineered water storage, water management, water production, water sampling structures, and/or structures that serve as conduits or barriers to water movement. Technologies disclosed herein are also applicable to measuring properties relating to other fluid and/or gas flow in engineered flow management structures.

主权项

1. A method for determining an engineering property of an engineered flow management structure comprising:
positioning an in-situ Nuclear Magnetic Resonance (NMR) sensor inside an engineered flow management structure comprising a dam, a levee, a canal, a well casing, an annular space between a well casing or underground pipeline and an undisturbed earth formation, a slurry wall, a grout curtain, or a retaining wall; coupling the in-situ NMR sensor with a NMR measurement control electronics; performing one or more NMR measurements with said in-situ NMR sensor and NMR measurement control electronics, wherein:
one or more of the earth's magnetic field and a static magnetic field generation device is used as a source of a static magnetic field for the series of NMR measurements;electromagnetic pulses are transmitted at a Larmor frequency of the static magnetic field to generate an NMR excitation signal; andone or more NMR measurement results are produced by performing the one or more NMR measurements; and determining an engineering property of the engineered flow management structure using one or more of the NMR measurement results, wherein the engineering property comprises one or more of a mechanical, hydraulic, or structural property.