A5072272027- Geophysical and Geoelectrical Methods
- Geophysics and Gravity Measurements
- Seismic Imaging and Inversion Techniques
- Geological and Geophysical Studies
- Reservoir Engineering and Simulation Methods
- Oil Spill Detection and Mitigation
- Hydrocarbon exploration and reservoir analysis
- Geomagnetism and Paleomagnetism Studies
- Geochemistry and Geologic Mapping
- Seismic Waves and Analysis
- Geological formations and processes
- Geological and Tectonic Studies in Latin America
- Methane Hydrates and Related Phenomena
- Dyeing and Modifying Textile Fibers
- Target Tracking and Data Fusion in Sensor Networks
- X-ray Spectroscopy and Fluorescence Analysis
- Underwater Vehicles and Communication Systems
- Crystallography and Radiation Phenomena
- Effects and risks of endocrine disrupting chemicals
- Age of Information Optimization
- Advanced Vision and Imaging
- Hair Growth and Disorders
- Characterization and Applications of Magnetic Nanoparticles
- Drilling and Well Engineering
- Radioactivity and Radon Measurements
Rice University
1974-2023
Shell (Netherlands)
1980-2014
Shell (United States)
2001-2014
University of Leeds
2006-2008
The University of Texas at Dallas
2008
Fugro (United States)
2008
University of Reading
2008
ETH Zurich
2008
Rudjer Boskovic Institute
1981
Lawrence Berkeley National Laboratory
1978
The gravity gradient tensor (whose components are the second derivatives of gravitational potential) is a symmetric that, ignoring constraint imposed by Laplace's equation, contains only six independent components. When measured on horizontal plane, these generate, in spectral domain, power densities (PSDs) and fifteen cross-spectra. cross-spectra can be split into two groups: real group pure imaginary group. If source distribution statistically stationary, 1D spectra found from 2D via slice...
We have used a polarized proton beam to measure the analyzing power for $\mathrm{pd}$ backward elastic scattering at incident kinetic energies of 0.68, 1.03, and 1.53 GeV reaction $p+p\ensuremath{\rightarrow}d+\ensuremath{\pi}$ 1.03 GeV. The data indicate that several mechanisms dominate over this energy range.
The past decade has seen some very exciting developments in time-lapse or 4D gravity surveys. We are pleased to present a diverse sampling of applications and new technologies this special section GEOPHYSICS, which captures the state art at time when reservoir-monitoring maturing into operational status. think these methodologies have an important future development energy groundwater resources as well carbon sequestration reduction natural hazards. It is our hope that papers will stimulate...
The generalized sampling expansion is a method that can be used to combine gravity and gradient data so the line spacing of survey increased without introducing aliasing into measured signal. This reduces acquisition costs because shipborne airborne surveys are related survey. combines Fourier spectra several undersampled sets produce an unaliased result. To achieve result, input assumed noise free, infinite in extent, regularly sampled, band limited. Deviations from this ideal induce...
IG-2 GRAVITY GRADIENTS FOR DE-RISKING PRESTACK DEPTH MIGRATION Summary 1 E.K. BIEGERT M. TALWANI 2 and D.J. SMIT 3 Shell International Exploration Production Inc. 3737 Bellaire Boulevard Houston TX 77025 USA Rice University U.K. Subsurface de-risking is presently almost exclusively done by methods using seismic data. Indeed all other data collected at the surface referred to as 'non-seismic' expressing this fact. However there are emerging gravity measurement technologies that could...
The borehole gravity method can be applied to making Gravity Measurements While Drilling (GMWD) if an appropriate sensor developed for use in a drilling environment. We performed study determine at high level the potential value of developing GMWD solving wide range important petroleum exploration and production (E&P) problems. investigated applications using steer drill bit.
The generalized sampling expansion (GSE) has been shown as a method for successfully interpolating combined gravity and gradient data sets when the are undersampled. presence of noise on renders such interpolation more difficult many applications (known expansions) GSE can be to intolerably amplify noise. However, key expansions interpolate noisy even, given limited error sufficiently narrow line-spacing, reduce These results hold both random along-line correlated (levelling type)...
Following the 2018 SEG Annual Meeting, Gravity and Magnetics Committee held a postconvention workshop titled “Integrated imaging.” The half-day attracted nearly 50 participants from various backgrounds. Three primary objectives of were to explore nonseismic toolbox, highlight real examples integrated projects that benefitted (or did not benefit) data, provide geoscientists all backgrounds learning opportunity see how they might optimize value their imaging via integration with relatively...
IG-3 GRAVITY-GRADIENT DATA INTEGRATED IN PRE-STACK DEPTH MIGRATION THE SOUTHERN NORTH SEA Summary 1 Shell U.K. Exploration and Production have acquired gravity-gradient data in the Southern North Sea to aid velocity/depth model building for pre-stack depth migration (PreSDM). Gravitygradient has higher resolution than conventional gravity (typically 600 m versus 3 km). Rather validating after a full-blown volume been incorporated into loop of iterative PreSDM using linear relationships...
“Why don’t hydrocarbon detection methods always work?” Only one third of recent exploration new venture opportunities used surface to calibrate the presence charge in system. There are distinct differences between manifestation hydrocarbons at these environments, which drive applied and ultimately way we interpret data. Most commercially available onshore ground-based techniques restricted their application prospect-scale assessment, primarily because logistics costs. Unfortunately, often...
If the current momentum is sustained, our industry soon will experience a grav / mag renaissance. Contrary to popular thought, gravity and magnetics community alive well. You could even say healthier than ever! The exploration has come long way since Blau’s “Black Magic” article, first article in issue of Geophysics. Gravity featured prominently that remain powerful tools. Then, as now, we continue use reconnaissance tool, Shell still interprets gradients.
The depolarization parameter for $\mathrm{pp}$ inclusive scattering at an incident momentum of 6 GeV/c was measured. $D$ indicates the dominance natural-parity exchange small $t$, except in case ${N}^{*}(1232)$ production, where $\ensuremath{\pi}$ is more important. elastic has also been This shows a decrease from unity with increasing transfer.
Recent advances in resolution and sensitivity of potential field sensors could fundamentally change subsurface risk management. Gravity gradiometer data have been fully integrated the cycle iterative pre-stack depth migration (PreSDM) model, updating to arrive at a high-fidelity model complex geological settings where seismic is inevitably poor quality. Upon integrating data, for example provided by new instruments currently available, it will be shown that significantly improved imaging can...
Why don't hydrocarbon detection methods always work?" Only one third of recent exploration new venture opportunities used surface to calibrate the presence charge in system. There are distinct differences between manifestation hydrocarbons at these environments, which drive applied and ultimately way we interpret data. Most commercially available onshore ground-based techniques restricted their application prospect-scale assessment, primarily because logistics costs. Unfortunately,...