National Technology & Engineering Solutions of Sandia, LLC

The University of New Mexico

Sandia Corporation

Transpo Industries, Inc.

Thomas Dewers

Jason E Heath

Charles R Bryan

Mahmoud Reda Taha

Yifeng Wang

John Stormont

Sang M Han

Patrick V Brady

Chowdary Ramesh Koripella

Edward N Matteo

Michael S Stenko

Richard P Jensen

Kristopher L Kuhlman

Moneeb Genedy

Laura L Pyrak-Nolte

Shreya Vemuganti

Robert J Finch

Jacob A Harvey

Chemical wave systems that utilize chemical compounds with nonlinear chemical wave behavior can be used to detect or sense material changes such as a change in a radiation source. Such chemical systems include autocatalysis that produce self-sustaining spatial and/or temporal fluctuations in chemical attributes such as species concentrations, pH, and/or redox state. Through application of the chemical compounds with wave behavior into engineered geologic environments, such as those for containment of a liquid or solid, the chemical wave behavior may be triggered or modified by perturbations, including intrusion into the environment. The chemical wave behavior is an indicator of the said perturbation and monitored by various means tailored to the type of chemical waves. The chemical waves can have a type of 'fingerprint' based on their wave behavior that lasts beyond a transient disturbance that could later be discerned by measurement of the chemical wave attributes.

Chemical wave perturbation detection systems and methods

A sensor having one or more stopbands and method of using the same for detecting damage, cracking and debonding in a cement structure comprising a cementitious material and a plurality of periodic structures located in the cementitious material.

Cementitious sensors with acoustic stopbands using carbon nanotubes

A system and method for powering a borehole sensor with thermal energy is disclosed. The system includes a tubular pipe inserted into a subsurface borehole. A borehole casing is coaxially disposed with the tubular pipe. An annular space between the casing and the tubular pipe has a power source placed in the borehole to power a sensor in response to a temperature gradient between a surface of the casing and a surface of the tubular pipe. The method includes attaching thermopiles on the borehole casing or tubing; placing the thermopile in the annulus between the casing and the tubing; inducing a thermal gradient across the thermopile; generating an electrical energy in response to the temperature gradient; powering the sensor from the generated energy; and monitoring vertical expansion of a COplume.

System and method thermopile energy harvesting for subsurface well bore sensors

Placement of proppant in subterranean formations during hydraulic fracturing is assessed. A method of one aspect includes introducing a hydraulic fracturing fluid including a proppant into a subterranean formation through a well. Samples of the hydraulic fracturing fluid are recovered through the well over a period of time. A concentration of at least one tracer in each of the samples is determined. The concentrations of the at least one tracer in the samples are analyzed to assess placement of the proppant in the subterranean formation. Other methods, apparatus, and systems are also disclosed.

Injection withdrawal tracer tests to assess proppant placement

A method and sealant to seal microcracks as small as 30 &#x3bc;m by causing methyl methacrylate combined with one or more nanoparticles to flow into the microcrack to be sealed.

Engineered nano-modified methyl methacrylate polymer for repair of 30 microM microcracks

A method for geo-sequestration of a carbon dioxide includes selection of a target water-laden geological formation with low-permeability interbeds, providing an injection well into the formation and injecting supercritical carbon dioxide (SC-CO) and water or bine into the injection well under conditions of temperature, pressure and density selected to cause the fluid to enter the formation and splinter and/or form immobilized ganglia within the formation.

Method for carbon dioxide sequestration

A method for geo-sequestration of a carbon dioxide includes selection of a target water-laden geological formation with low-permeability interbeds, providing an injection well into the formation and injecting supercritical carbon dioxide (SC&#x2014;CO) into the injection well under conditions of temperature, pressure and density selected to cause the fluid to enter the formation and splinter and/or form immobilized ganglia within the formation. This process allows for the immobilization of the injected SC&#x2014;COfor very long times. The dispersal of scCO2 into small ganglia is accomplished by alternating injection of SC&#x2014;COand water. The injection rate is required to be high enough to ensure the SC&#x2014;COat the advancing front to be broken into pieces and small enough for immobilization through viscous instability.

Growing community of inventors

Albuquerque, NM, United States of America

Thomas Dewers