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Rock-based studies of the Eagle Ford Group of Central Texas demonstrate that mudrock deposition is more complicated than previously supposed. X-Ray Diffraction (XRD), X-Ray Fluorescence (XRF), Total Organic Carbon (TOC), and log data collected from 8 cores and 2 outcrops demonstrate that bottom current reworking and planktonic productivity are primary depositional controls, acting independently from eustatic forcing.
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The recognition, correlation and quantification of oil mixtures remain challenging in petroleum system studies. Most prolific basins have multiple source rocks that generate petroleum over wide ranges of maturity. Compound-specific isotopic analyses of alkanes (CSIA-A) and diamondoids (CSIA-D) are very effective for determining hydrocarbon mixtures.
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The elemental chemostratigraphy of the Upper Cretaceous Niobrara Member of the Mancos Shale shows that six chemostratigraphic zones can be identified in the Piceance Basin, Colorado, based on geochemical data.  Chemostratigraphic correlations of nine wells spaced 20 mi (~32 km) apart closely match lithostratigraphic correlations made using gamma-ray and deep-resistivity wireline logs.
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Fault damage zones in porous sandstones commonly exhibit networks of deformation bands reflecting crushing and reorganization of grains associated with small-scale, localized displacement. Deformation bands introduce anisotropic, order-of-magnitude reduction of effective permeability which will affect fluid flow in reservoir rocks.
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A novel hydrogeochemical modeling approach is developed to unravel thermochemical sulfate reduction (TSR) in hydrocarbon reservoirs. Our numerical model couples a web of interconnected hydrogeochemical reactions to three-dimensional and reservoir-wide diffusive mass transport.
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Recently Added in News
 

Time is a precious commodity to us all, and is particularly treasured by geologists who have a unique relationship with the concept of time. Time is an especially precious commodity when it is given to the AAPG Foundation, in whatever increment.

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A popular topic among educators and recruiters in our discipline is what geology, and the people who practice it, will look like in the future. It’s an interesting question when you consider the origins of our discipline, its pioneers and how both geology and its practitioners have evolved in the past 100 years.

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Three outer continental shelf (OCS) oil and gas issues were prominent in 2015 policy debates and will continue in the policy limelight in 2016 as the federal government moves to release final versions of the permits, plans and rules.

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The Ayoluengo field was the first commercial oil discovery in Spain and more than 50 years later remains the only onshore oilfield in the Iberian Peninsula. The field was discovered in 1964 and is still producing.

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The main goal for shale resource characterization is usually the identification of sweet spots, which represent the most favorable drilling targets. Such sweet spots can be identified as those pockets in the target formation that exhibit high total organic carbon (TOC) content, as well as high brittleness. As there is no direct way of computing TOC using seismic data, we adopt indirect ways for doing so.

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Recently Added Special Publications
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Papers in this publication describe case studies and workflows that demonstrate applied structural geology, covering a spread of topics including trap definition, fault seal, fold-and-thrust belts, fractured reservoirs, fluid flow and geomechanics. Against a background of evolving ideas, new data types and advancing computational tools, the volume highlights the need for structural geologists to constantly re-evaluate the role they play in solving industrial challenges.
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Continental margins and their fossilized analogues are important repositories of natural resources. With increased availability of high quality geological, seismic and potential field data, imaging of these margins and their embedded sedimentary basins and magnetic rocks has reached new levels of refinement and definition, as illustrated by the examples described in this volume.
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This volume includes contributions dealing with the origin of the magnetic minerals, and the application of MS as a palaeoenvironmental or palaeoclimatic proxy and also as a tool to provide astronomical calibration in order to improve the chrononology of selected time intervals.
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Recently Added
 
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.
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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.
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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
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The data presented in the following files were sourced from the global heat flow database of the International Heat Flow Commission, which is managed by the University of North Dakota, Grand Forks, ND USA.
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Deltaic depositional facies result from interacting dynamics processes (wave energy, tidal regime, currents, climate, etc.), which modify and disperse riverborne (fluvial) clastic deposits.

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Recently Added
 

The AAPG/EAGE “Hydrocarbon Seals of the Middle East” GTW took place 18-20 January 2016 at the Crowne Plaza Hotel in Muscat, Oman.

57 industry professionals from 11 countries and 27 companies attended the workshop to network with peers and colleagues and learn about the industry’s geosciences. 20 presentations took place, representing a combination of 13 different companies and academic institutions.

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The goal of this two-day workshop is to develop strategies for success in difficult times. We will bring together engineers, geologists and geophysicists to explore new ideas, workflows, techniques, and technologies for revitalizing existing wells.
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Use ATC to target and position your company in the minds of industry professionals and decision makers responsible for Arctic E&P. Booking your exhibit space and securing your sponsorship demonstrates your commitment to the safe and effective exploration, discovery and production of the Arctic and its vast resources.

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Eminent speakers discuss Reality in the current downturn
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