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The AAPG/Datapages Combined Publications Database
Showing 625 Results. Searched 196,436 documents.
An SEM Study of Porosity in the Organic-rich Lower Bakken Member and Pronghorn Member, Bakken Formation, Williston Basin
Jingqi Xu, Stephen A. Sonnenberg
Unconventional Resources Technology Conference (URTEC)
... with the LECO TOC based on 103 samples from the Mowry and Niobrara formations. The vitrinite reflectance was calculated by using the empirical equation...
2017
Organic Geochemical Properties of Alaskan North Slope Oils and Rocks: SPECIALIZED OR STATISTICAL APPROACHES
L. R. Snowdon, T. G. Powell
AAPG Special Volumes
... with water, drying, and combustion in pure oxygen in a Leco WR-12 carbon analyzer. Commercial calibration standards were used. The results are reported...
1985
Application of Raman Spectroscopy in Investigating the Effect of Source and Temperature on the Maturity of the Organic Matter Exposed to Hydrocarbon Gas Injection
Sherifa Cudjoe, Reza Barati, Craig Marshall, Robert Goldstein, Jyun-Syung Tsau, Brian Nicoud, Kyle Bradford, Amanda Baldwin, David Mohrbacher
Unconventional Resources Technology Conference (URTEC)
...) correlation formulated by Jarvie [28]. Table 1. Leco TOC and Rock-Eval pyrolysis measurements of the LEF shale samples [29] Samples TOC (wt...
2019
Multi-Disciplinary Fracture and Spacing Study in the DJ Basin
Jason Brand, Jessica Barhaug, Roger Reinmiller, Ronald Parker, Bilu Cherian
Unconventional Resources Technology Conference (URTEC)
.... A petrophysical model was initially constructed using a triple combo dataset with core data (saturations, porosities, grain-density, XRD volumes and Leco...
2021
Recent Sediments of the St. Lawrence Middle Estuary
B. d'Anglejan, M. Brisebois
Journal of Sedimentary Research (SEPM)
... selected cores. Determination of organic and carbonate carbon were also routinely done on the same samples with an induction (LECO) furnace. The heavy...
1978
The Role of Iron in Mudstone Diagenesis: Comparison of Kimmeridge Clay Formation Mudstones from Onshore and Offshore (UKCS) Localities
Joe H. S. Macquaker , Charles D. Curtis , Max L. Coleman
Journal of Sedimentary Research (SEPM)
...) and high-temperature combustion (using a LECO induction furnace). Whole-rock instrumental elemental techniques can neither provide information...
1997
Controls on Hydrogen Sulfide Formation in a Jurassic Carbonate Play, Turkmenistan
Gary H. Isaksen, Mukhammetnur Khalylov
AAPG Special Volumes
...-water tests. Source rocks were analyzed by Leco total organic carbon (TOC), Rock-Eval pyrolysis, and for their elemental composition, whereas solvent...
2007
Hydrocarbon-Generating Potential of Humic Coals from Dry Pyrolysis (1)
SHAN-TAN LU and ISAAC R. KAPLAN
AAPG Bulletin
... to sulfate with a LECO carbon/sulfur analyzer. The sulfate was precipitated as barium sulfate, which was then converted in a vacuum line to SO[2] gas...
1990
Organic geochemistry of oil and source rock strata of the Ordos Basin, north-central China
Andrew D. Hanson, Bradley D. Ritts, J. Michael Moldowan
AAPG Bulletin
... of TOC (Leco TOC, in wt.%) content measurements and Rock-Eval analyses. Based on the initial screening, potential source rocks were chosen for more...
2007
Hydrocarbon potential of Ordovician–Silurian successions in Akkas field, western desert of Iraq
Mohamed W. Alkhafaji, Zeki A. Aljubouri, Imad A. Aldobouni, and Ralf Littke
AAPG Bulletin
.... % are considered potential source rocks (Tissot and Welte, 1984; Hunt, 1996). Sulfur concentration was measured for the 76 samples using a LECO S2000 sulfur...
2015
Bitumen geochemistry and producibility in the Upper Cretaceous Niobrara Formation shale oil play
Yuanjia Han, Brian Horsfield, Nicolaj Mahlstedt, and Heather LaReau
AAPG Bulletin
... in a LECO SC632 combustion oven that regulated at 1350°C. The TOC was calculated from the peak area of generated CO2 recorded by an infrared detector. GCMS...
2021
Evolution of overpressure in the Wufeng-Longmaxi shale reservoirs of the Jiaoshiba area, Sichuan Basin, southwestern China: Implications for shale gas preservation
Tao Luo, Xiaowen Guo, Zhiliang He, Kamaldeen O. Omosanya, Ze Tao, and Sheng He
AAPG Bulletin
... test (Zhang et al., 2017). The TOC testing was carried out using a LECO CS-200 carbon-sulfur analyzer following the China National Standard...
2024
Intraformational Migration of Oil, Gas-Condensate and Methane-Rich Gas in a Major Unconventional Petroleum Accumulation: Montney Formation, Western Canada
James M. Wood
Unconventional Resources Technology Conference (URTEC)
...) of co-produced gas and liquid samples, Rock-Eval pyrolysis measurements, LECO TOC measurements, PVT studies, and analysis of well production data...
2023
High-Resolution Stratigraphy and Paleobiology of the Hartland Shale Member: Analysis of an Oxygen-Deficient Epicontinental Sea
B.B. Sageman
Special Publications of SEPM
... calcareous shale, and many shale; 2) dark-colored micro- to macroburrowed marlstone; 3) dark-colored calcarenite beds; 4) dark carbon using a LECO Induction...
1985
Sedimentology of the Uranium-Bearing Salt Wash Member and Tidwell Unit of the Morrison Formation in the Henry and Kaiparowits Basins, Utah
Fred Peterson
Utah Geological Association
... by delayed neutron; organic carbon by difference after Leco combustion. Most of the production in the region has been from deposits in ore zone 4...
1980
Authigenic Mineralization in Low-rank Coals from the Velenje Basin, Slovenia
Tjaša Kanduč, Polona Vreča, Špela Gregorin, Mirijam Vrabec, Marko Vrabec, Fausto Grassa
Journal of Sedimentary Research (SEPM)
...) using a Leco CS 244 analyzer for low-level carbon content in the range from 11.8 to 59.2% (Actlabs, Canada). Samples containing more than 50% of TOC...
2018
Biomarker signatures in Triassic coprolites
Raman Umamaheswaran, G.V.R. Prasad, Arka Rudra, Suryendu Dutta
PALAIOS
... ChemStation. GC 3 GC-ToF MS Analysis.—Samples were analyzed using a LECO Pegasus 4D system consisting of Agilent 7890B gas chromatograph equipped...
2019
Sulfur-Isotope Variations in Marginal-Lacustrine Rocks Of The Green River Formation, Colorado and Utah
Rex D. Cole, M. Dane Picard
Special Publications of SEPM
... marcasite and pyr isotopic phase organically complexed using a LECO induction furnace Purified iron sulfide minerals were oonverted to sulfur dioxide S02...
1981
Geochemistry of Ordovician black shales at Meductic, southern Miramichi Highlands, New Brunswick
James F. Hennessy, David J. Mossman
Atlantic Geology
... and sulfur using a LECO combustion and IR detection unit, model CS-344; graphitic carbon was determined by leaching with 15% HC1 to drive off CO2...
1996
Generation and Migration of Hydrocarbons in Upper Cretaceous Austin Chalk, South-Central Texas
George J. Grabowski Jr.
AAPG Special Volumes
.... Organic-carbon contents were determined by subsequent combustion of the acid-insoluble material in a Leco carbon analyzer (Grabowski, 1981). Powdered...
1984
Paleoceanographic Interpretation of Variations in the Sulfur Isotopic Compositions and Mn/Fe Ratios in the Miocene Monterey Formation, Santa Maria Basin, California: Chapter 13
Doreen A. Zaback, Lisa M. Pratt
AAPG Special Volumes
..., phosphorus, and iron concentrations and isotopic composition of pyrite sulfur. The weight percent of total sulfur was obtained using a LECO C/S-244...
1993
Origin and Alteration of Lower Cretaceous Mannville Group Oils from the Provost Oil Field, East Central Alberta, Canada
C.L. Riediger, R. Macdonald, M.G. Fowler, L.R. Snowdon, M.D. Sherwin
CSPG Bulletin
... provided by the well operator for each oil. All oils were analysed for sulphur content using a LECO SC32 sulphur analyser. Results are reported as weight...
1999
Sedimentologic and Stratigraphic Controls on Reservoir Sweet Spots in Wolfcamp 'A,' Howard County, Midland Basin
Alyssa N. Flotron, Evan K. Franseen, Robert H. Goldstein
Unconventional Resources Technology Conference (URTEC)
... total clay and quartz content of the Sparky and Big Ern samples analyzed by XRD and LECO carbon analyzer. Data points are colored to represent...
2019
Contact Metamorphism and Over Maturation of Organic Matter Associated with an Igneous Intrusion in the Smackover Formation, Northeastern Louisiana
Ezat Heydari , Gary R. Byerly , Darrell J. Henry
GCAGS Transactions
..., and combusted with pure oxygen in a LECO CS-44 carbon analyzer at 1000°C. Total organic matter 13C composition was determined by combusting five milligrams...
1997
Am I Producing From Where I Landed? - The Importance and Challenges of Drainage Definition via Subsurface Fluid Chemistry
Craig D. Barrie, Richard Patience
Unconventional Resources Technology Conference (URTEC)
.... Samples were screened, after washing and crushing, for total organic carbon (TOC) using a LECO SC632 and pyrolysis using a Rock-Eval 6. From these initial...
2022