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In contrast to the high-frequency and high-amplitude sea level changes of icehouse times, eustatic sea level changes in greenhouse times are now generally accepted as significantly lower frequency and amplitude.
American Association of Petroleum Geologists (AAPG)
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Statistical classification methods consisting of the k-nearest neighbor algorithm (k-NN), a probabilistic clustering procedure (PCP), and a novel method which incorporates outcrop-based thickness criteria through the use of well-log-indicator flags are evaluated for their ability to distinguish fluvial architectural elements of the upper Mesaverde Group of the Piceance and Uinta basins as distinct electrofacies classes.
American Association of Petroleum Geologists (AAPG)
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Abnormal pressures are encountered during exploration drilling in different parts of Krishna-Godavari Basin in the east coast of India. Nature and the stratigraphic occurrences of the overpressure zones vary across the basin.
American Association of Petroleum Geologists (AAPG)
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Two hundred twenty five rock samples and thirty seven oil samples from the Beibuwan Basin, South China Sea, were analyzed with geochemical and organic petrological techniques to evaluate the Eocene lacustrine source rocks, and investigate controls on their properties and the distribution of different oil families in the basin.
American Association of Petroleum Geologists (AAPG)
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Opening-mode veins in cores drilled from the mudrocks over- and underlying the major Silurian salt décollement in the Appalachian plateau (Tioga and Lawrence Counties, Pennsylvania), have mineralogic and isotopic compositions generally matching those of their host mudrocks, suggesting opening and filling amid little cross-stratal fluid motion.
American Association of Petroleum Geologists (AAPG)
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Trustee Emeritus Paul Strunk was recently presented with the L. Austin Weeks Memorial Medal. In addition, the Trustee Associates 39th annual meeting was held in October in Hawaii.

American Association of Petroleum Geologists (AAPG)
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The 7th annual Young Professionals Leadership Summit was held this October in Houston as part of the AAPG Mid-Year Business Meeting.

American Association of Petroleum Geologists (AAPG)
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Natural gas not only improves air quality by reducing smog, but also helps mitigate the impact of climate change by significantly reducing emissions. It has tangible positive effects on people’s lives around the world.

American Association of Petroleum Geologists (AAPG)
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Energy policy was not a major topic of the presidential campaigns, but President-elect Donald Trump’s positions represent a radical change from current energy policy.

American Association of Petroleum Geologists (AAPG)
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Recent developments in pattern recognition-based seismic facies classification (clustering) provide a means to analyze multiple seismic attributes in a single volume.

American Association of Petroleum Geologists (AAPG)
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Recently Added Special Publications
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This volume covers the linkage between new transform margin research and increasing transform margin exploration. It offers a critical set of predictive tools via an understanding of the mechanisms involved in the development of play concept elements at transform margins.
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Originally published in 1991, this memoir offers a unique, detailed analysis on solving one of petroleum geology's most perplexing problems -- reservoir prediction.
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Noted authority Andrew Robinson compiled this research for all geoscientists interested in this region stretching from Greece to the Caspian Sea. Scientists, many from the area, explore the diverse and complex geotectonism.
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A joint publication of the AAPG and SEG, the product offers 30 profusely illustrated case studies from around the world demonstrating practical applications of 3-dimensional seismic data. It includes detailed illustrations in color and black and white, and covers fluvial-deltaic, eolian, deep-water clastic, carbonate, and structural reservoirs. Special emphasis is placed on the application of 3-D data to development drilling, reservoir characterization, and reservoir management. This atlas is designed to confirm 3-D seismic interpretation in drilling and production.
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AAPG Datapages and the AAPG GIS Publications Committee wish to thank Katharine Lee Avary, the Department of Energy’s Eastern Gas Shales Project (EGSP), the United States Geological Survey (USGS) and the AAPGF-OSU Geoscience GIS Consortium for allowing the Devonian Shales of the Appalachian Basin GIS Dataset to be posted on Datapages’ GIS Open Files page, thereby making it available to the public as a free download.

American Association of Petroleum Geologists (AAPG)
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Methane clathrate (CH4·5.75H2O) or (4CH4·23H2O), also called methane hydrate, hydromethane, methane ice, fire ice, natural gas hydrate, or gas hydrate, is a solid clathrate compound (more specifically, a clathrate hydrate) in which a large amount of methane is trapped within a crystal structure of water, forming a solid similar to ice. Originally thought to occur only in the outer regions of the Solar System, where temperatures are low and water ice is common, significant deposits of methane clathrate have been found under sediments on the ocean floors of the Earth.
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This zipped file contains geodatabase and xls (Excel) tables used by ExxonMobil in creating and editing geologic GIS feature classes and building attribute tables. AAPG Datapages, Inc. appreciates the efforts by the AAPG GIS Publication committee and ExxonMobil.
American Association of Petroleum Geologists (AAPG)
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These datasets depict the location and extent of oil and gas fields and pools across Pennsylvania, provide basic reservoir characterization data at the pool level (to the extent possible), and provide representative well-specific data to chronicle the evolution of the petroleum industry from the time of Drake’s well (Titusville, 1859) through the end of calendar year 2011.
American Association of Petroleum Geologists (AAPG)
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This is a regional study that stretches from Anderson County, Texas in the northeast to Fayette County, Texas in the southwest. The GIS data captures individual formations in the Wilcox Group, plus the Carrizo Sand unit: maximum sand thickness, net sand thickness, lignite thickness, resistivity of maximum sand thickness (to delineate ground water movement) and percent sand
American Association of Petroleum Geologists (AAPG)
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Register now for ACE 2017 and experience a remarkable week of science, networking, activities and commemorations celebrating a century of the world’s best geosciences.

American Association of Petroleum Geologists (AAPG)
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This two-day conference will feature 60 oral presentations and 20 poster displays, as well as pre- and post-conference field trips. Explore the six technical sessions and the conference themes ...

American Association of Petroleum Geologists (AAPG)
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ACE is one of the world’s premier geoscience events that is completely created and hosted by geoscientists for geoscientists; therefore, your company’s support translates into a valuable return on investment for our shared industry success. We invite you to book your exhibit space today and share this milestone with us.

American Association of Petroleum Geologists (AAPG)
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Share your ideas, innovations and experiences at the Unconventional Resources Technology Conference (URTeC) and be part of the most vibrant and vital integrated science and technology event for unconventional play development.

American Association of Petroleum Geologists (AAPG)
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This exploration-themed conference will bring together a diverse group of delegates from all corners of the petroleum industry. We're calling all E&P experts to speak at this global A&D event.

American Association of Petroleum Geologists (AAPG)
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