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Optimal design of 3D borehole seismic arrays for microearthquake monitoring in anisotropic media during stimulations in the EGS collab project
Full text linkMultiple U.S. national laboratories, universities and industrial collaborators are conducting collaborative research under the EGS Collab project supported by the U.S. Department of Energy, to understand the fracture creation and imaging during fracturing in enhanced geothermal systems. Microearthquake hypocenter locations and focal mechanisms are used to monitor hydraulic fracturing growth and characterization at the EGS Collab experimental site at the Sanford Underground Research Facility using seismic receivers in multiple monitoring wells. We develop a methodology for optimal design a 3D borehole seismic array for cost-effective seismic monitoring in anisotropic media using not only the relationship between receiver distributions and standard deviation errors of microearthquake hypocenter locations, but also that between receiver distributions and focal-mechanism inversion errors. Our results indicate that microearthquake hypocenter locations and focal mechanisms can be reasonably well reconstructed for the EGS Collab Experiment I using six monitoring wells, including four fracture-parallel monitoring wells and two orthogonal wells. Eight seismic receivers evenly distributed in four parallel monitoring wells or twelve receivers in all six monitoring wells are required for hypocenter location, and twelve receivers evenly distributed in six wells or sixteen receivers in four wells are needed for focal-mechanism inversion
Collab - collaborative raster painting editor
No full textCollab je projekt, jehož cílem je vytvořit celistvou platformu poskytující uživatelům grafický editor, který může být napojen k jiným vlastním instancím přes počítačovou síť takovým způsobem, že všichni propojení uživatelé mohou kreslit na stejné plátno a vidí v reálném čase práci ostatních.
Práce uvádí problém sdíleného kreslení, navrhuje řešení na základě rešerší, navrhuje finální softwarovou architekturu a popisuje vlastní implementaci. Projekt byl rozdělen do několika nezávislých částí. CRPP -- Collaborative Raster Painting Protocol je grafický síťový protokol a jeho dokumentace. Collab Desktop je aplikace, kterou uživatelé použijí pro sdílené kreslení. Collab Canvas je Java SWING knihovna pro grafické editory, která implementuje rozhraní usnadňující napojení na síť. Collab Server je server, ke kterému se mohou připojovat klienti přes CRPP.
Collab projekt byl z velké části úspěšný. Vznikl návrh a dokumentace síťového protokolu, několik Java knihoven, server a klientská aplikace ve verzi připravené k použití.Collab is a project which aims to create a full platform empowering users with a graphical editor which could be connected to is's other instances via a computer network in a way that all interconnected users draw on the same "canvas" and see each others work immediately.
The thesis introduces matters of collaborative painting, suggests a solution based on surveys, designs final project architecture and describes actual implementation. The project was divided into multiple independent parts. CRPP -- Collaborative Raster Painting Protocol is a network protocol and it's documentation. Collab Desktop is a desktop client users will use for collaborative painting. Collab Canvas is a Java SWING library for graphical editors implementing interface which make it easy to connect it to a network. Collab Server is a server to which the client connects.
The Collab project was in most parts successful. There is designed network protocol, several Java libraries and server and desktop applications ready to use
Comment investir en formation, Guy Le Boterf, Pierre Durand-Gasselin (collab.), Jean-Marie Pechenard (collab.)
No full textAnsari Françoise, Brossier Christine, Duval Jean-Luc, Meunier Françoise. Comment investir en formation, Guy Le Boterf, Pierre Durand-Gasselin (collab.), Jean-Marie Pechenard (collab.). In: Formation Emploi. N.31, 1990. p. 87
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Scientific Findings to Engineering Realities: Coordination across Collab teams and making the connection to FORGE
Full text linkThis document provides a distillation of learnings of the EGS Collab (Collab) project for several topics of interest requested by the Utah Frontier Observatory for Research in Geothermal Energy (FORGE) project. This document was written following the completion of Collab Experiment 1, but prior to beginning Collab Experiment 2. Recommendations offered herein are perspectives offered by Collab scientists in support of FORGE.
The United States has an enormous indigenous renewable energy potential from enhanced geothermal systems (EGS). To realize this potential, the US Department of Energy (DOE) Geothermal Technologies Office (GTO) has made significant investments into research to eliminate impediments to developing EGS. Two major current projects are Collab initiated in 2017, and the FORGE project initiated with a site selection process in 2015.
Collab is a collaborative multi-national-lab, university, and commercial entity research endeavor bringing together a team of skilled and experienced subsurface process modeling, monitoring, and experimentation researchers and engineers to focus on intermediate-scale EGS reservoir creation processes and related model validation in crystalline rock. Collab is utilizing readily accessible underground facilities to refine the understanding of rock mass response to stimulation using experiments on the order of 10 m scale under EGS-relevant stress conditions. Experimental results from Collab stimulation, flow, tracer, and thermal tests are being used to validate coupled thermal-hydrological-mechanical-chemical (THMC) modeling approaches applicable to EGS. Collab is also testing and improving conventional and novel field monitoring tools. The project focuses on understanding and predicting permeability enhancement and evolution in crystalline rock. This focused research includes creating sustained and distributed permeability for heat extraction by generating new fractures that complement existing natural fractures.
FORGE has the mission of establishing an EGS field test site that enables cutting-edge research and testing for EGS technology to identify a replicable, commercial pathway to EGS. The FORGE team is developing the EGS field test site near Milford, Utah. The two projects differ in some attributes, including spatial scale (Collab / FORGE - 10-m / reservoir), access to the rock (short boreholes and nearby instruments / deep wells and standard field geophysical equipment), environmental conditions (cool rock at reasonable stress / hot rock at reasonable stress), focus (direct investigation / development of a testbed and management of a research program), and project structure (integrated team / science and engineering framework supporting many individual research teams).
The specific topics of this report requested by FORGE are: 1) data processing, annotation, and integration; 2) processing seismic data, 3) connecting geophysics, fractures, and flow systems, and 4) challenges of modeling fractured flow systems. Each of these topics is briefly discussed in this executive summary and covered in substantially greater detail in the main document. Numerous conference and journal papers are cited in the report that provide additional information. Many lessons have been learned. Some are not directly transferable to FORGE, but the underpinnings of the lessons may be applicable
Comment investir en formation, Guy Le Boterf, Pierre Durand-Gasselin (collab.), Jean-Marie Pechenard (collab.)
No full textAnsari Françoise, Brossier Christine, Duval Jean-Luc, Meunier Françoise. Comment investir en formation, Guy Le Boterf, Pierre Durand-Gasselin (collab.), Jean-Marie Pechenard (collab.). In: Formation Emploi. N.31, 1990. p. 87
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