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Analysis of location uncertainty for a microearthquake cluster: A case study 

Melo, Gabriela; Malcolm, Alison E.; Poliannikov, Oleg V.; Fehler, Michael (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, ...
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Joint microseismic event location with uncertain velocity 

Poliannikov, Oleg V.; Prange, Michael; Malcolm, Alison E.; Djikpesse, Hugues (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
We study the problem of the joint location of seismic events using an array of receivers. We show that locating multiple seismic events simultaneously is advantageous compared to the more traditional approaches of locating ...
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Full-waveform Based Microseismic Event Detection and Signal Enhancement: The Subspace Approach 

Song, Fuxian; Warpinski, Norm R.; Toksoz, M. Nafi; Kuleli, Huseyin Sadi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
Microseismic monitoring has proven to be an invaluable tool for optimizing hydraulic fracturing stimulations and monitoring reservoir changes. The signal to noise ratio (SNR) of the recorded microseismic data varies ...
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Downhole microseismic monitoring of hydraulic fracturing: a full-waveform approach for complete moment tensor inversion and stress estimation 

Song, Fuxian; Toksoz, M. Nafi; Li, Junlun (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 ...
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Focal Mechanism Determination of Induced Microearthquakes in an Oil Field Using Full Waveforms from Shallow and Deep Seismic Networks 

Li, Junlun; Kuleli, Huseyin Sadi; Zhang, Haijiang; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2011-05-09)
A new, high frequency, full waveform matching method is used to study the focal mechanisms of small, local earthquakes induced in an oil field, which are monitored by a sparse near-surface network and a deep borehole ...
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Focal Mechanism Determination Using High Frequency Waveform Matching and Its Application to Small Magnitude Induced Earthquakes 

Li, Junlun; Zhang, Haijiang; Kuleli, Huseyin Sadi; Toksoz, M. Nafi (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 ...
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A unified Bayesian framework for relative microseismic location 

Poliannikov, Oleg V.; Prange, Michael; Malcolm, Alison E.; Djikpesse, Hugues (Massachusetts Institute of Technology. Earth Resources Laboratory, 2013)
We study the problem of determining an unknown microseismic 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 ...
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Full-waveform Based Complete Moment Tensor Inversion and Stress Estimation from Downhole Microseismic Data for Hydrofracture Monitoring 

Song, Fuxian; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2011)
Downhole microseismics has gained increasing popularity in recent years as a way to characterize hydraulic fracturing and to estimate in-situ stress state. Conventional approaches only utilize part of the information ...
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Focal Mechanism Determination using High Frequency, Full Waveform Information 

Li, Junlun; Zhang, Haijiang; Kuleli, Huseyin Sadi; Toksoz, M. Nafi (Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
In this research, we use high frequency waveform information to determine the focal mechanisms of small local earthquakes at an oil reservoir. During the waveform inversion, we maximize both the phase and amplitude matching ...

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AuthorToksoz, M. Nafi (6)Kuleli, Huseyin Sadi (4)Li, Junlun (4)Malcolm, Alison E. (3)Poliannikov, Oleg V. (3)Song, Fuxian (3)Zhang, Haijiang (3)Djikpesse, Hugues (2)Prange, Michael (2)Fehler, Michael (1)... View MoreSubject
Inversion (9)
Microseismic (9)
Fractures (1)Interferometry (1)... View MoreDate Issued2013 (4)2010 (2)2011 (2)2009 (1)Has File(s)Yes (9)

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