Research Geologist
Central Energy Resources Science Center
Email:
tcollett@usgs.gov
Office Phone:
303-236-5731
Fax:
303-236-8822
ORCID:
0000-0002-7598-4708
Supervisor:
Ofori N Pearson
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Fine-grained sediments, or “fines,” are nearly ubiquitous in natural sediments, even in the predominantly coarse-grained sediments that host gas hydrates. Fines within these sandy sediments can be mobilized and subsequently clog flow pathways while methane is being extracted from gas hydrate as an energy resource. Using two-dimensional (2D) micromodels to test the conditions in which clogging occurs provides insights for choosing production operation parameters that optimize methane recovery in the field. During methane extraction, several processes can alter the mobility and clogging potential of fines: (1) fluid flow as the formation is depressurized to release methane from gas hydrate, (2) shifting pore-fluid...
Categories: Data;
Tags: 2D micromodel,
Bay of Bengal,
Department of Civil and Environmental Engineering,
Geophysics,
Indian Ocean, All tags...
Krishna-Godavari Basin,
Laboratory,
Louisiana State University,
Louisiana State University, Department of Civil and Environmental Engineering,
Marine Geology,
NGHP-02,
NGHP-02-09,
NGHP-02-16,
Woods Hole Coastal and Marine Science Center, U.S. Geological Survey,
bentonite,
brine,
calcium carbonate,
clogging,
deionized water,
diatoms,
earth material properties,
fine-grained sediment,
gas hydrate resources,
geoscientificInformation,
illite,
image analysis,
kaolin,
laboratory experiments,
mica,
natural resource extraction,
optical microscopy,
permeability,
silica silt,
soil sciences, Fewer tags
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This data release contains the boundaries of assessment units and input data for the assessment of undiscovered gas hydrate resources on the north slope of Alaska. The Assessment Unit is the fundamental unit used in the National Assessment Project for the assessment of undiscovered oil and gas resources. The Assessment Unit is defined within the context of the higher-level Total Petroleum System. The Assessment Unit is shown herein as a geographic boundary interpreted, defined, and mapped by the geologist responsible for the province and incorporates a set of known or postulated oil and (or) gas accumulations sharing similar geologic, geographic, and temporal properties within the Total Petroleum System, such as...
Categories: Data;
Types: Downloadable,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
Shapefile;
Tags: Assessment Unit,
Continuous Assessment Unit,
Earth Science,
Economic geology,
Energy Resources, All tags...
Energy Resources,
Geology,
NOGA2000,
Nanushuk Formation Gas Hydrate,
National Assessment of Oil and Gas,
Natural Gas,
Natural Resources,
Natural gas resources,
Northern Alaska Province,
Oil,
Oil resources,
OilGas,
Resource Assessment,
Sagavanirktok Formation Gas Hydrate,
State of Alaska,
Tuluvak-Schrader Bluff-Prince Creek Formation Gas Hydrate,
U.S. Geological Survey,
U.S.A.,
USGS,
USGS Science Data Catalog (SDC),
USGS World Energy Region 5,
USGS World Energy Region 5,
Unconventional Assessment Unit,
United States,
United States of America,
energy resources,
geoscientificInformation,
natural gas resources,
oil resources,
petroleum, Fewer tags
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Understanding how effectively methane can be extracted from a gas hydrate reservoir requires knowing how compressible, permeable, and strong the overlying seal sediment is. This data release provides results for flow-through permeability, consolidation, and direct shear measurements made on fine-grained seal sediment from Site NGHP-02-08 offshore eastern India. The sediment was collected in a pressure core from the Krishna-Godavari Basin during the 2015 Indian National Gas Hydrate Program Expedition 2 (NGHP-02). Gas hydrate is a crystalline solid that forms naturally in the sediment of certain marine and permafrost environments where pressure is relatively high (equivalent to the pressure measured ~300 meters water...
Categories: Data;
Tags: Bay of Bengal,
CMGP,
Coastal and Marine Geology Program,
Indian Ocean,
Krishna-Godavari Basin, All tags...
U.S. Geological Survey,
USGS,
WHCMSC,
Woods Hole Coastal and Marine Science Center,
core analysis,
drilling and coring,
earth material properties,
fine-grained sediment,
geoscientificInformation,
oceans,
pressure core,
rotary drilling,
soil sciences, Fewer tags
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Understanding how effectively methane can be extracted from a gas hydrate reservoir requires knowing how compressible, permeable, and strong the overlying seal sediment is. This data release provides results for flow-through permeability, consolidation, and direct shear measurements made on fine-grained seal sediment from Site NGHP-02-08 offshore eastern India. The sediment was collected in a pressure core from the Krishna-Godavari Basin during the 2015 Indian National Gas Hydrate Program Expedition 2 (NGHP-02). Gas hydrate is a crystalline solid that forms naturally in the sediment of certain marine and permafrost environments where pressure is relatively high (equivalent to the pressure measured ~300 meters water...
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One goal of the Indian National Gas Hydrate Program's NGHP-02 expedition was to examine the geomechanical response of marine sediment to the extraction of methane from gas hydrate found offshore eastern India in the Bay of Bengal. Methane gas hydrate is a naturally occurring crystalline solid that sequesters methane in individual molecular cages in a lattice of water molecules. Methane gas hydrate is a potential energy resource, but whether extracting methane from gas hydrate in the marine subsurface is technically and economically viable remains an open research topic as of 2018. This data release provides insight about a poorly quantified aspect of this process: the reaction of fine-grained sediment particles...
Categories: Data;
Tags: Bay of Bengal,
CMGP,
Coastal and Marine Geology Program,
Indian Ocean,
Krishna-Godavari Basin, All tags...
U.S. Geological Survey,
USGS,
WHCMSC,
Woods Hole Coastal and Marine Science Center,
brine,
core analysis,
deionized water,
earth material properties,
fine-grained sediment,
geoscientificInformation,
kerosene,
laboratory experiments,
oceans,
settling,
soil sciences, Fewer tags
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