A5051655007- Geophysical and Geoelectrical Methods
- Geophysical Methods and Applications
- Geochemistry and Geologic Mapping
- Seismic Imaging and Inversion Techniques
- Seismic Waves and Analysis
- Electrical and Bioimpedance Tomography
- Earthquake Detection and Analysis
- Geological Modeling and Analysis
- Non-Destructive Testing Techniques
- Reservoir Engineering and Simulation Methods
- Scientific Research and Discoveries
- Image Processing and 3D Reconstruction
- NMR spectroscopy and applications
- Geological and Geochemical Analysis
- Thermography and Photoacoustic Techniques
- Enhanced Oil Recovery Techniques
- Atomic and Subatomic Physics Research
- Geological formations and processes
- Magnetic confinement fusion research
- earthquake and tectonic studies
- Numerical methods in inverse problems
- Ionosphere and magnetosphere dynamics
Teck (Canada)
2023
Condor Petroleum (Canada)
2018-2021
University of British Columbia
2012-2018
University of Colorado Boulder
2010
Colorado School of Mines
2009-2010
The magnetic method has been proven to be a successful geophysical tool for the detection of unexploded ordnance (UXO). Aeromagnetic surveys are advantageous since they can acquire data over large areas. downside is that anomalies due multiple metallic targets overlap significantly flight height restrictions. Such combined with acquisition noise may decrease signal-to-noise ratio data. These adverse effects mask true level contamination at site during initial assessment based on as well...
We present an algorithm for enhancing magnetic data in UXO applications using a stable downward continuation method. The formulates the as inverse problem Tikhonov regularization and has flexibility of incorporating expected power spectrum anomalies. degree is estimated automatically well‐established methods linear problems. Numerical tests show that can reliably estimate noise reconstruct anomaly at ground surface within limitation imposed by noise. reconstructed field exhibits significant...
Summary In this paper, we propose using electromagnetic (EM) methods to monitor the growth of a SAGD steam chamber in an oil sands reservoir. past, 2D crosswell DC resistivity survey data have been acquired and interpreted with some success. We show that two-dimensional inversions produce low quality images artifacts. The are improved by carrying out 3D inversions. However, much improvement can be obtained full band EM surveys either frequency- or time-domain. Practical implementation highly...
We have investigated the use of electric and electromagnetic (EM) methods to monitor growth steam-assisted gravity drainage (SAGD) steam chambers. SAGD has proven be a successful method for extracting bitumen from Athabasca oil sands in Alberta, Canada. However, complexity heterogeneity within reservoir could impede chamber growth, thereby limiting recovery increase production costs. Using seismic data collected over an existing project, we generated synthetic modeled it as conductive body...
Summary The magnetic and electromagnetic responses from airborne systems at Tli Kwi Cho, a kimberlite complex in the Northwest Territories, Canada, have received considerable attention over last two decades but complete understanding of causative physical properties is not yet hand. Our analysis distributed among three posters. In first we find 3D susceptibility model for area; second conductivity model; third chargeability that can explain negative transient measured pipes. this paper focus...
Summary Heterogeneity in the Athabasca oil sands can impede growth of SAGD steam chambers. Here, we show how controlled-source electromagnetic (EM) methods be used to detect growth-impeded regions and monitor changes chamber growth. Our achievements are two-fold. We first generate a background resistivity model based on well logging at field site then estimate chambers using an empirical formulation that incorporates effects temperature surrounding rocks. Using resulting 3D model, responses...
In this paper, we divide the steps to explore, identify, and monitor a SAGD site into six stages show how electromagnetic methods can be used at each stage. Three-dimensional inversion of airborne EM data provide large-scale, regional geologic trends delineate paleo-channels caprock thickness newly-developed property in Athabasca oil sands. We use semi-synthetic models from resistivity logging conjunction with ground-based borehole surveys characterize oil-rich McMurray Formation steam...
Summary The magnetic and electromagnetic responses from airborne systems at Tli Kwi Cho, a kimberlite complex in the Northwest Territories, Canada, have received considerable attention over last two decades but complete understanding of causative physical properties is not yet hand. Our analysis distributed among three papers. In first, we find 3D susceptibility model for area; second, conductivity model; third paper, chargeability model. goal to explain all geophysical results within...
Steam Assisted Gravity Drainage (SAGD) is a proven technology to extract heavy oil from the Athabasca sands in Alberta, Canada. Research and pilot programs have shown growth steam chambers can be detected monitored using electrical methods, indicating decrease resistivity due steaming process. We analyze surveys currently practice sensitivity of data model perturbations. show that certain greater important regions reservoir, inversions collected these provide better recovery chambers. The...
In this talk, we present results from a geophysical investigation at the Chimney Rock Great House using magnetics, electromagnetics, and DC resistivity. Our data is focused on grid southwest of House, where use geophysics to detect potential buried walls. These walls may be covered by 1 3 m fill as result nearby excavations in 1920s, should approximately 0.5 thick. Using geophysics, were able identify several targets multiple datasets, which are consistent with sketches earlier...
In conjunction with the National Forest Service, a number of different geophysical datasets were collected over region adjoining southwest end Great House at Chimney Rock, Colorado. The investigations aim to determine if foundations for more rooms exist in this region, as early archeological sketches indicate. following types collected: magnetic, frequencydomain electromagnetic (FEM), DC resistivity (middle gradient and 2D dipole-dipole), microgravity. This multipronged approach was used...
In conjunction with the National Forest Service, a number of different geophysical datasets were collected over region adjoining southwest end Great House at Chimney Rock, Colorado. The investigations aim to determine if foundations for more rooms exist in this region, as early archeological sketches indicate. following types collected: magnetic, frequency‐domain electromagnetic (FEM), DC resistivity (middle gradient and 2D dipole‐dipole), microgravity. This multipronged approach was used...
The Abitibi greenstone belt has been and continues to be a prolific gold producer. Historic production is in excess of 170 million ounces active exploration ongoing. geophysical responses at deposits are varied, making using geophysics isolation difficult. In this paper, we take renewed look the signatures over known relate them their mineralogy geology. three case histories presented, airborne magnetic electromagnetic reveal linear coincident or parallel that strike same direction as main...
SummaryIn this paper, we present an algorithm based on the sensitivity of data to model space reduce large amount commonly collected during 3D DC/IP surveys only those most relevant and important space. The sensitivity-based reduction (SBDR) is demonstrated using both synthetic field examples. results indicate that SBDR recovered models are valid solutions full inversion problem but require a fraction computation time resources, providing geologic solution in much shorter than required solve problem.
The Reed Lake VMS (volcanic hosted massive sulfide) deposit is situated in north central Manitoba a Paleozoiccovered portion of the eastern end Paleoproterozoic metavolcanic Flin Flon Domain. was discovered October 2007 when junior mining firm, Ventures Inc. testing outcomes VTEM EM and magnetic survey. Subsequently, variety additional airborne surveys were conducted, including further VTEM, ZTEM Falcon AGG carried out as both orientation efforts to find possible resources area. Surface...