Recently Added in Journals

Borehole images are useful for in-depth characterization of fluvial deposits in the Upper Cretaceous of the Piceance Basin, Colorado. This procedure is especially useful in the reconstruction of paleomorphology, flow, regime, and fluvial architecture.

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Coal rank depends on the temperature of coalification. In the Illinois Basin, midwestern United States, coal rank is not dependent on thickness of overlying sediments as shown by vitrinite reflectance. Heat advected into the basin by groundwater flow contributed to the coal rank anomaly.

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Tight-gas reservoirs that have experienced late uplift following an earlier phase of charge are unlikely to be characterized by primary drainage and are much more likely to be characterized by imbibition (the displacement of one fluid by another) or by secondary drainage.

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Exploration in the Putumayo basin and adjacent thrust belt, Colombia, has resulted in variable oil quality. To better understand the reasons, the authors reconstructed the structural evolution, the timing of oil migration, and the timing of groundwater infiltration in the region.

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A flexible, object-based rock reconstruction algorithm reproduces the microscale micritic fabrics of microporous carbonates. Results quantify the importance of micropores in contributing to or controlling overall flow and sweep characteristics in such fabrics.

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Critical factors related to topographic, geologic, and hydrologic features are important for the creation and preservation of underpressure present in the Midcontinent of the United States. One of these areas is the large, highly saline brine plume of western Oklahoma and Kansas.

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In Tunisia, most borehole temperatures used to constrain the thermal histories of sedimentary basins were previously corrected using various methods, set to best-fit domains other than the Tunisian basins. This study aimed to propose a new method of borehole temperature correction suitable for the Jeffara Basin, southeastern Tunisia.


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The Devonian carbonate platform (Obj-2) of the Kharyaga field (Russia) is operated by Total since 1999 and produces 42° API oil, rich in H2S. A multi-disciplinary (sedimentological, structural, stratigraphic and geomechanical modeling) and multi-scale study was made of the field, integrating seismic, micro-resistivity log (FMI) and core data in order to characterize the reservoir.

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Increased rates of seismicity in tectonically quiescent regions like the midcontinent region of the United States have been hypothesized to be related to human activities such as oil and gas production and wastewater injection. It can be difficult to establish how human activities relate to earthquakes, particularly when local seismic networks are not available to provide a high-quality characterization of the seismic sequence in question.

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Pore types, pore size, and pore abundance vary systematically across thermal maturity in the Eagle Ford Formation, Maverick Basin, southern Texas. Scanning electron imaging of twenty samples from four wells is used to assess the complex response of pores to chemical and mechanical processes, entailing both destruction of primary porosity and generation of secondary pores.

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Recently Added in News
This year’s AAPG Foundation Professor of the Year, AAPG member Joseph Satterfield of Angelo State University, had a unique problem when he first arrived at the school. There wasn’t a geology department – well, not much of one, anyway.
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The Young Professionals are very excited to share that the Executive Committee approved the YPs as the first AAPG SIG this August.
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The discovery and untimely loss of the Jusepin Deep Field in Venezuela is a story of creativity, perseverance, technical excellence and emotion – which are qualities we as geoscientists like to feel we bring to our jobs every day.
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A burst of new emissions regulations that affect the oil and natural gas industry has cheered the environmental community while distressing the industry and opponents of government regulation.
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The key elements for shale resource evaluation are the mineral content – such as clay, quartz and calcite – the total organic carbon (TOC) content, the brittleness and some mechanical properties of the shale rocks. Geomechanical studies are necessary both for understanding wellbore environment stability and also interpreting well log data, by estimating the mechanical properties of the subsurface.
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The DPA continues to work to provide scientific, business and professional support to its members through sponsored forums.
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Scientific publishing is undergoing major changes driven by the shift to digital publication - and the digital revolution will continue to change the way that AAPG disseminates our science.
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Do you know a college or university professor who is setting a gold standard in earth science education? Nominate him or her today for an opportunity to be acknowledged for his or her efforts.
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The lecturers for the AAPG 2015-16 Global Distinguished Lecture Program have been announced.
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Recently Added Special Publications
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This Special Publication presents recent research on the generation and migration of gas in the context of the deep geological disposal of radioactive waste. In particular, it focuses on the mechanisms by which gas migrates through clay based engineering barrier/backfill materials and clay-rich host rocks.
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This volume consists of 27 multidisciplinary papers which include a wide range of geological and geophysical topics, such as geochemistry and petroleum systems, earthquake seismology and tomography, seismic stratigraphy and sedimentology, oil and gas exploration plays, carbonate and siliciclastic petrology, basement studies, regional tectonics and structural geology, fold belt structural analyses, potential methods, and studies on the Magdalena fan.
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This CD reprint of the Special Edition of the October 2008 AAPG Bulletin comprises 11 papers on the subject of managing risk and uncertainty in exploration and asset management.
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This memoir contains 15 well-illustrated, peer-reviewed chapters that describe the history of field development, the deposition and diagenesis of the reservoir rocks, geophysical characteristics of the field, special core analysis techniques used to better quantify the reservoir, petrophysical characteristics and interpretations of the reservoir, the types and abundance of natural fractures, and fluid production characteristics in the field. Finally, static and dynamic models for the field are presented in an attempt to integrate all the pieces of this giant geologic puzzle.
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This volume highlights key challenges for fluid-flow prediction in carbonate reservoirs, the approaches currently employed to address these challenges and developments in fundamental science and technology.
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This publication is quite diverse in terms of topics, approaches, and philosophies, as well as in terms of the geological settings and operational aspects that are addressed. There is a good mix of theory, applications, resources, and practical advice, along with some historical perspectives and a sprinkling of futurism.
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The purpose of this publication is to review many of the current methods and paradigms that have been developed for the computer analysis of petrophysical logs for geological applications.
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Thirteen papers published in the August 2014 Special Issue of the AAPG Bulletin deal with aspects of faulting and fracturing, and the effects of mechanical pressures on shale and other self-sourcing reservoirs.
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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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Sequence stratigraphy is the study of genetically related facies within a framework of chronostratigraphically significant surfaces. Paleontologic data, integrated with seismic and well log data, are an integral part of sequence stratigraphic analysis.

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Pore type, pore geometry, and fluid properties are critical factors affecting permeability. Sandstone texture directly affects pore type and geometry. Knowing what textures and fluids to expect, as well as what authigenic clays might be present, can help us predict permeability

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Solar energy is the use of direct sunlight, the solar energy arriving on Earth. Direct sunlight can be used for two main purposes: for heating and cooling and for the generation of electricity.

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Seismic facies analysis is the description and interpretation of seismic reflection parameters, such as configuration, continuity, amplitude, and frequency, within the stratigraphic framework of a depositional sequence.

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Coal is a readily combustible rock containing more than 50% by weight and more than 70% by volume of carbonaceous material, including inherent moisture.

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Recently Added

AAPG has a set of new e-symposia for this fall, just in time for you to build on your strengths and stay strong during a downturn.

AAPG's e-symposia presented in a "live" one-hour program, and then are archived for any time / any place access. You also receive access to articles, review questions, video, audio files, and a PDF of the presentation.

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Despite the current industry challenges, the first part of this series of co-presented events the AAPG | SEG 2015 International Conference and Exhibition in Melbourne, Australia was technical and networking success. Attracting 1,386 of the world's best and brightest geologists, geophysicists and engineers from students and young professionals to the most seasoned industry experts and senior management representing 39 countries.

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The AAPG course on “Reservoir Engineering for Petroleum Geologists” is designed for persons who wish to acquire a broad understanding of the factors that influence the production of oil and gas from reservoirs. It will be useful for geoscientists, land management specialists, managers and others with no previous training in reservoir engineering. This course is part of AAPG’s upcoming Fundamentals Education Conference, taking place November 9-13, in Houston, TX.
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The AAPG course on “The Petroleum System: An Investigative Method to Explore for Conventional and Unconventional Hydrocarbons,” emphasizes how the petroleum system concept can be used to more systematically investigate how hydrocarbon fluid moves from the active source rock to a conventional or unconventional accumulation and thereby reduce risk. This course is part of AAPG’s upcoming Fundamentals Education Conference, taking place November 9-13, in Houston, TX.

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The objective of the AAPG course on “Clay Minerals (Classification, Structure, Chemistry, Properties, Diagenesis) in Reservoir Evaluation” is to instill enough fundamental and applied information about clay minerals so that a person will know what questions are relevant when formulating a work flow for a project, when evaluating real data, or when trying to figure out what might have “gone wrong” during a project. This course is part of AAPG’s upcoming Fundamentals Education Conference, taking place November 9-13, in Houston, TX.
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Each e-symposium consists of a one-hour video, with self-study articles and questions for CEU / PDH credit. You also receive access to the audio file and PDF for easy download.

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The AAPG course on “Quick Guide to Carbonate Well Log Analysis” provides just that – a quick guide that concentrates on methods used to analyze carbonate reservoirs. It is an advanced course and assumes the course participants are already well informed about basic well logging principles. This course is part of AAPG’s upcoming Fundamentals Education Conference, taking place November 9-13, in Houston, TX.
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The AAPG course on “Rock/Fluid Interactions and Natural Fracture Development and Alteration” provides a practical approach to defining reservoir fluid and pressure related natural fracture generation and fracture property alteration in conventional and unconventional reservoirs. This course is part of AAPG’s upcoming Fundamentals Education Conference, taking place November 9-13, in Houston, TX.
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The AAPG course on "RQ Toolkit – Using Rock Data for Reservoir Quality Assessment" is designed to provide a general background in optimized reservoir quality assessment using rock data (core, SWC, cuttings, outcrops). This course is part of AAPG's upcoming Fundamentals Education Conference, taking place November 9-13, in Houston, TX. 

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The AAPG course on “Practical Geomechanics” is designed for geoscientists interested in stress measurements and their application to problems arising from rock failure. This course is part of AAPG’s upcoming Fundamentals Education Conference, taking place November 9-13, in Houston.
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