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Seismic imaging of hydraullically-stimulated fractures: A numerical study of the effect of the source mechanism
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
We present a numerical study of seismic imaging of hydraulically stimulated fractures using a single source from an adjacent fracturing-process. The source is either a point force generated from the perforation of the ...
Analysis of location uncertainty for a microearthquake cluster: A case study
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
In many reservoirs, an increase in permeability and conductivity is achieved by hydraulic fracturing/stimulations which open cracks and fractures that then act as pathways for fluids to navigate in the subsurface. Mapping, ...
Converted Phase Elastic Migration Velocity Analysis
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
Multi-component elastic seismic data collected at large offsets have the potential to be used in seismic imaging and velocity analysis. In this study, we present an approach for converted-phase elastic-transmission migration ...
Visibility Analysis using Reverse Time Wave Sensitivity for Time-Lapse Target-Oriented Imaging
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2011)
Identifying the relationship between surface seismic data and a particular region in the earth, referred to as visibility analysis, is important because it facilitates the optimization of the quality and speed of the imaging ...
Target-oriented Time-lapse Waveform Inversion using Virtual Survey
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
Time-lapse seismic data are widely used for monitoring time-variant subsurface changes. Conventional analysis provides qualitative information by comparing results from consecutive surveys, whereas waveform inversion can ...
Monitoring Seismic Attenuation Changes Using a 4D Relative Spectrum Method in Athabsca Heavy Oil Reservoir, Canada
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
Heating heavy oil reservoirs is a common method for reducing the high viscosity of heavy oil and thus increasing the recovery factor. Monitoring these changes in the reservoir is essential for delineating the heated region ...
Carbon sequestration monitoring with acoustic double-difference waveform inversion: A case study on SACROC walkaway VSP data
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2011)
Geological carbon sequestration involves large-scale injection of carbon dioxide into underground geologic formations and is considered as a potential approach for mitigating global warming. Changes in reservoir properties ...
Double-Difference Waveform Inversion of 4D Ocean Bottom Cable Data: Application to Valhall, North Sea
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
Changes in reservoir properties resulting from extracting hydrocarbons and injecting fluid are critical to optimize production. These properties can be characterized using waveform inversions of time-lapse seismic data. ...
Using Image Warping for Time-lapse Image Domain Wavefield Tomography
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
Time-lapse seismic data are widely used for monitoring subsurface changes. A quantitative assessment of how reservoir properties have changed allows for better interpretation of fluid substitution and migration during ...
Data-Driven Estimation of the Sensitivity of Target-Oriented Time-Lapse Seismic Imaging to Source Geometry
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
The goal of time-lapse imaging is to identify and characterize regions in which the
earth's material properties have changed between surveys. This requires an effective deployment of sources and receivers to monitor the ...