Science Emeritus
Email:
lruppert@usgs.gov
Office Phone:
703-648-6431
ORCID:
0000-0002-7453-1061
Location
12201 Sunrise Valley Drive
, MS 954
Reston
VA 20192
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Petroleum within unconventional source-rock reservoirs is hosted in organic matter and mineral pore space as well as in voids and microfractures. Recent work has shown that for source-rock reservoirs in the dry gas window, significant portions of methane (CH4), the main component of petroleum at elevated maturities, can be stored within fine organic matter porosity. However, within reservoirs at lower thermal maturities (e.g., peak oil or wet-gas conditions), the distribution and behavior of CH4 and the higher alkanes that comprise gas condensates across pore sizes is unclear, especially for fine pores with diameters <50 nm. Understanding CH4 within these settings provides insight for petroleum generation, movement,...
Categories: Data;
Tags: Colorado,
Contrast Matching,
Denver-Julesburg Basin,
Energy Resources,
Gas Condensate, All tags...
Geochemistry,
Natural Gas,
Neutron Scattering,
Shale,
USGS Science Data Catalog (SDC), Fewer tags
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At recent technical conferences, many coal geoscientists in academia and government institutions as well as in industry organizations have expressed concern about the dwindling number of students and young staff members interested in careers in coal geoscience. To better understand what is driving these trends and to identify potential ways that the community can increase interest and participation in coal geoscience, two different surveys were sent to 94 coal geoscientists who were current or past members of The Society of Organic Petrology (TSOP) in February 2020. As the trends and perceptions in industry and government organizations may be different than in universities, one distinct survey was sent to members...
Categories: Data;
Tags: Africa,
Asia,
Australia,
Canada,
China, All tags...
Coal,
Coal geoscience,
Coal geoscientist,
Columbia,
Denmark,
Europe,
Future of coal geoscience,
Gender,
Germany,
Greece,
Indonesia,
Last hire,
Left field,
Nigeria,
Non-combustion uses of coal,
North America,
Poland,
Recruitment,
Retrained,
Russia,
South America,
Spain,
Staff,
Students,
USGS Science Data Catalog (SDC),
United Kingdom,
United States, Fewer tags
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Subsurface microbial (biogenic) methane production is an important part of the global carbon cycle and has resulted in natural gas accumulations in many coal beds worldwide. Laboratory experiments indicate coal beds can act as natural geobioreactors and produce additional low carbon renewable natural gas with algal or yeast compounds, yet the effectiveness of these nutrients in situ are unknown. This study uses down-well monitoring methods in combination with deuterated water (99.99% D2O) and a 200-liter injection of 0.1% yeast extract to stimulate and isotopically label newly generated methane. A total dissolved gas pressure sensor was placed down-well into the Flowers-Goodale coal bed at the USGS Birney Test Site...
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The Middle Pennsylvanian (Bolsovian) Leatherwood coal in central eastern Kentucky is a moderately thick (up to >1.6 m in the sites examined in this study) coal bed that has been one of the major sources of electricity in the region. To document and understand the organic petrology and inorganic chemistry of the Leatherwood coal, geologists from the University of Kentucky Center for Applied Energy Research (CAER), Kentucky Geological Survey (KGS), and U.S. Geological Survey (USGS) collected 45 bench samples of the Leatherwood coal in the late-1980’s through the early-2000’s. USGS laboratories analyzed the chlorine and selenium contents of 27 bench samples by ion chromatography (IC) and hydride generation-atomic absorption...
Categories: Data;
Tags: Bench coal,
Coal resources,
Coal-vapor atomic absorption (CVAA),
Energy Resources,
Energy resources, All tags...
Geochemistry,
Ion chromatography (IC),
Kentucky,
Leatherwood coal,
USGS Science Data Catalog (SDC), Fewer tags
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Geoheritage is a term which lies at the intersection of science, society, and sustainability and is applied to significant geologic features and landforms that have scientific, educational, cultural, economic, and aesthetic value. Many geologic sites have enriched society through the geoheritage values: scientific research and education, cultural significance, economic opportunities, and aesthetic appeal. The Geoheritage Sites of the Nation geodatabase (GDB) provides an initial inventory of geoheritage sites to showcase the geodiversity and natural heritage throughout the United States (U.S.) and its territories. Sites included in this inventory were selected from compiled geosite references of in situ geologic...
Categories: Data;
Tags: Aesthetic,
Alabama,
Alaska,
American Samoa,
Aquatic Biology, All tags...
Arizona,
Arkansas,
Bureau of Land Management,
California,
Climatology,
Colorado,
Connecticut,
Cultural,
Delaware,
Economic,
Educational,
Florida,
Forestry,
Geochemistry,
Geodiversity,
Geography,
Geoheritage,
Geology,
Geomorphology,
Georgia,
Guam,
Hawaii,
Idaho,
Illinois,
Indiana,
Iowa,
Kansas,
Kentucky,
Land Use Change,
Louisiana,
Maine,
Maryland,
Massachusetts,
Michigan,
Minnesota,
Mississippi,
Missouri,
Montana,
National Park Service,
Nebraska,
Nevada,
New Hampshire,
New Jersey,
New Mexico,
New York,
North Carolina,
North Dakota,
Northern Mariana Islands,
Ohio,
Oklahoma,
Oregon,
Outreach,
Pennsylvania,
Puerto Rico,
Rhode Island,
Scientific,
South Carolina,
South Dakota,
Tennessee,
Texas,
U.S. Fish and Wildlife Service,
U.S. Forest Service,
U.S. Virgin Islands,
USGS Science Data Catalog (SDC),
Utah,
Vermont,
Virginia,
Washington,
Water Resources,
West Virginia,
Wildlife Biology,
Wisconsin,
Wyoming, Fewer tags
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