Vista Clara Inc. | Date: 2014-05-23
Technologies applicable to noise canceling in-situ NMR detection and imaging are disclosed. An example noise canceling in-situ NMR detection apparatus may comprise one or more of a static magnetic field generator, an alternating magnetic field generator, an in-situ NMR detection device, an auxiliary noise detection device, and a computer.
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 225.00K | Year: 2015
Statement of the problem that is being addressed: This proposal addresses the challenge of non-invasively measuring subsurface hydrogeologic properties that control the transport of contaminants and availability of groundwater resources, and efficiently mapping these properties over wide areas of the shallow subsurface (upper ~50m). General statement of how this problem is being addressed: We will develop rapid scanning nuclear magnetic resonance (NMR) instrumentation and methods that can be used to efficiently map subsurface hydrogeologic properties using land or airborne deployment platforms. Surface NMR has been proven as a powerful geophysical technique for quantitatively measuring porosity and permeability, but to date the technology has been cumbersome with low signal-to-noise (SNR) and slow measurement speeds that limit the ability to efficiently survey large areas. We will transform surface NMR into a rapid mapping technology through novel advancements in hardware, acquisition methods, and processing algorithms that will yield order of magnitude improvements in measurement speed for wide area hydrogeologic characterization. Phase I Tasks: The Phase 1 research will establish the feasibility of obtaining high quality surface NMR data in vastly reduced measurement times with mobile deployment platforms. We will first establish the feasibility of novel acquisition and processing innovations to increase the available SNR with reduced measurement durations. We will further develop and demonstrate hardware improvements to enhance system mobility and surveying efficiency. Finally, we will directly demonstrate the feasibility of rapid surface NMR field measurements to map hydrogeologic properties using land-towed and airborne platforms. Commercial Applications and Other Benefits: Completion of this technology in Phase II and beyond will deliver rapid scanning surface NMR as a commercial product for sale, rental, and services in the booming market of geophysical mapping instrumentation sales and services. This technology will be of tremendous value to any company, government, or public agency engaged in contaminated site remediation, groundwater resource evaluation and development, or compliance with environmental standards. In particular reducing survey times and increasing the reliability of hydrogeologic mapping, will reduce site characterization costs, allow improved decision making, and will ultimately improve project outcomes and profitability. Ultimately, the technology will benefit worldwide human and ecosystem health, by enabling effect protection and management of groundwater resources. Key Words: Nuclear magnetic resonance, NMR, magnetic resonance sounding, groundwater, contamination, porosity, permeability, geophysics, hydrogeophysics, geophysical mapping, airborne geophysics. Summary for Members of Congress: There is a critical need to measure and map underground properties that influence groundwater availability and contaminant clean up. This project will develop rapid, efficient, and accurate measurement techniques based on the same physics as medical MRI, to map these properties over wide areas and improve groundwater management.
Vista Clara Inc. | Date: 2013-01-25
Technologies including NMR relaxation time estimation methods and corresponding apparatus are disclosed. Example techniques may generate two or more alternating current transmit pulses with arbitrary amplitudes, time delays, and relative phases; apply a surface NMR acquisition scheme in which initial preparatory pulses, the properties of which may be fixed across a set of multiple acquisition sequence, are transmitted at the start of each acquisition sequence and are followed by one or more depth sensitive pulses, the pulse moments of which are varied across the set of multiple acquisition sequences; and apply processing techniques in which recorded NMR response data are used to estimate NMR properties and the relaxation times T
Vista Clara Inc. | Date: 2013-10-15
Technologies including NMR logging apparatus and methods are disclosed. Example NMR logging apparatus may include surface instrumentation and one or more downhole probes configured to fit within an earth borehole. The surface instrumentation may comprise a power amplifier, which may be coupled to the downhole probes via one or more transmission lines, and a controller configured to cause the power amplifier to generate a NMR activating pulse or sequence of pulses. Impedance matching means may be configured to match an output impedance of the power amplifier through a transmission line to a load impedance of a downhole probe. Methods may include deploying the various elements of disclosed NMR logging apparatus and using the apparatus to perform NMR measurements.
Vista Clara Inc. | Date: 2013-09-23
Technologies applicable to surface-based NMR measurement are disclosed. A surface probe is positionable at or above a surface of the Earth and adapted to make NMR measurements of shallow or very shallow subsurface volumes. NMR spectrometer components connected to the surface probe are configured to control electromagnetic pulses produced by the surface probe and to record resulting detected NMR signals from the subsurface volume.