Papers by Erika Gasperikova
Geophysical Prospecting
Multiphysics inversion exploits different types of geophysical data that often complement each ot... more Multiphysics inversion exploits different types of geophysical data that often complement each other and aims to improve overall imaging resolution and reduce uncertainties in geophysical interpretation. Despite the advantages, traditional multiphysics inversion is challenging because it requires a large amount of computational time and intensive human interactions for preprocessing data and finding trade‐off parameters. These issues make it nearly impossible for traditional multiphysics inversion to be applied as a real‐time monitoring tool for geological carbon storage. In this paper, we present a deep learning (DL) multiphysics network for imaging CO2 saturation in real time. The multiphysics network consists of three encoders for analysing seismic, electromagnetic and gravity data and shares one decoder for combining imaging capabilities of the different geophysical data for better predicting CO2 saturation. The network is trained on pairs of CO2 label models and multiphysics da...
International Journal of Greenhouse Gas Control
Geoscience Data Journal
We present a synthetic multi‐scale, multi‐physics dataset constructed from the Kimberlina 1.2 CO2... more We present a synthetic multi‐scale, multi‐physics dataset constructed from the Kimberlina 1.2 CO2 reservoir model based on a potential CO2 storage site in the Southern San Joaquin Basin of California. Among 300 models, one selected reservoir‐simulation scenario produces hydrologic‐state models at the onset and after 20 years of CO2 injection. Subsequently, these models were transformed into geophysical properties, including P‐ and S‐wave seismic velocities, saturated density where the saturating fluid can be a combination of brine and supercritical CO2, and electrical resistivity using established empirical petrophysical relationships. From these 3D distributions of geophysical properties, we have generated synthetic time‐lapse seismic, gravity and electromagnetic responses with acquisition geometries that mimic realistic monitoring surveys and are achievable in actual field situations. We have also created a series of synthetic well logs of CO2 saturation, acoustic velocity, densit...
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information), Feb 1, 2023
Geological Society of America Abstracts with Programs
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information), Nov 13, 2018
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information), Sep 14, 2022
OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information), Jun 16, 2022
International Journal of Greenhouse Gas Control
Predictive reservoir modeling, even if present in the form of only basic hydrogeological model as... more Predictive reservoir modeling, even if present in the form of only basic hydrogeological model assumptions, is expected to accompany the majority of carbon capture and sequestration monitoring activities. It thus represents a source of prior information about the migration of injected fluids that can benefit geophysical survey planning and ensuing monitoring. Constraining the imaging of geophysical monitoring data with reservoir modeling is preferable over standalone geophysical imaging because of additional complementary hydrogeological information. However, fully coupled hydrogeophysical data inversion for flow-modeling parameters that control saturation predictions is an involved process. Within the context of threedimensional electromagnetic (EM) inversion of data from borehole-to-surface layouts, we employ a "poor people's" alternative. The approach constrains geophysical inversion parameters through saturation predictions. The coupling is realized through spatially variable lower and upper parameter bounds that scale with gas saturation magnitudes, the latter provided by reservoir modeling. Enhancement of three-dimensional time-lapse plume EM imaging is demonstrated for simulated sequestration into a depleted gas reservoir.
AGU Fall Meeting Abstracts, Dec 1, 2018
AGU Fall Meeting Abstracts, Dec 1, 2019
AGU Fall Meeting Abstracts, Dec 1, 2020
AGU Fall Meeting Abstracts, Dec 1, 2019
Geophysics and Geosequestration, 2019
We describe the ongoing development of joint geophysical imaging methodologies for geothermal sit... more We describe the ongoing development of joint geophysical imaging methodologies for geothermal site characterization and demonstrate their potential in two regions: Krafla volcano and associated geothermal fields in Northeastern Iceland, and Coso Hot Springs in California, USA. The Coso field is a high temperature reservoir similar to Krafla in Iceland. Each area is a locus of significant geothermal energy production. The complex geology of these sites also makes them excellent targets for developing and testing of strategies for joint imaging of magnetotelluric (MT) and micro-earthquake (MEQ) data. Our ultimate aim is to construct coupled 3D resistivity and velocity models of these geothermal systems and use them to better understand and exploit them.
Author(s): Gasperikova, E; Morrison, F; Conti, U | Abstract: An improved version of the Marine UX... more Author(s): Gasperikova, E; Morrison, F; Conti, U | Abstract: An improved version of the Marine UXO characterization system MBUD, called MBUD2, has been built and tested. The improved version has a new data acquisition system and incorporates technical modifications to eliminate the noise encountered in seawater with the MBUD1 version. The target is illuminated with fields from three orthogonal transmitters, and the signal is measured using four three component receivers. The receivers are arranged in a configuration that inherently cancels the response of the system to enclosing seawater, and to the response of the air-sea interface for shallow deployments. The system was operated as a cued system. It is mounted on a simple platform on top of a support structure that is transported to a predefined survey location by a carrier boat, lowered to the sea bottom, and maneuvered by a diver. The support structure extends one meter below the system platform to allow for the object placement...
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Papers by Erika Gasperikova