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A unified framework for relative source localization using correlograms
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
We study the problem of determining an unknown event location relative to previously located events using a single monitoring array in a monitoring well. We show that using the available information about the previously ...
3D Weak-Dispersion Reverse-Time Migration with a StereoModeling Method
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
The finite difference method has been widely used in seismic modeling and reverse time migration. However, it generally has two issues: large computational cost and numerical dispersion. Recently, a nearly-analytic discrete ...
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 ...
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 ...
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 ...
Interferometric imaging of multiples in an RTM approach
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
It is well known that reverse-time migration is capable of correctly
imaging multiply scattered energy. To do this, one of the interfaces
from which the waves scatter must be included in the background velocity
model. ...
Advanced 3D Geophysical Imaging Technologies for Geothermal Resource Characterization
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2012)
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 ...
Detecting medium changes from coda by interferometry
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
In many applications, sequestering CO[subscript 2] underground for example,
determining whether or not the medium has changed is
of primary importance, with secondary goals of locating and
quantifying that change. We ...
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 ...
Recursive Imaging with Multiply-Scattered Waves Using Partial Image Regularization: A North Sea Case Study
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
As more resources are directed toward reverse-time migration an accurate velocity
model, including strong reflectors, is necessary to form a clear image of the subsurface.
This is of particular importance in the vicinity ...