Search
Now showing items 1-5 of 5
An improved method for hydrofracture induced microseismic event detection and phase picking
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
The ability to detect small microearthquakes and identify their P and S phase arrivals is a
key issue in hydrofracture downhole monitoring because of the low signal-to-noise ratios.
We apply an array-based waveform ...
Focal Mechanism Determination Using High Frequency Waveform Matching and Its Application to Small Magnitude Induced Earthquakes
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
We present a new method using high frequency full waveform information to determine the
focal mechanisms of small, local earthquakes monitored by a sparse surface network. During the
waveform inversion, we maximize both ...
Downhole microseismic monitoring of hydraulic fracturing: a full-waveform approach for complete moment tensor inversion and stress estimation
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
Downhole microseismics has gained in popularity in recent years as a way to characterize hydraulic fracturing sources and to estimate in-situ stress state. Conventional approaches only utilize part of the information ...
Estimate the Effective Elastic Properties of Digitized Porous Rocks by Inverting the Cracks Unresolved
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
Current imaging technique such as micro X-ray CT can provide us detailed 3D micro-structures of porous
rocks that can be used in numerical simulation so as to predict elastic properties of rocks saturated with
different ...
Frequency-Domain Finite-Difference Acoustic Modeling with Free Surface Topography using Embedded Boundary Method
(Massachusetts Institute of Technology. Earth Resources Laboratory, 2010)
In this paper, we present a method to model acoustic wave propagation in the frequencydomain
in the presence of free surface topography using the embedded boundary method. The
advantage of this method is to solve for the ...