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Recently Added in Bulletin
 
Berea reservoirs in eastern Kentucky are generally low-permeability, heterogenous, tight siltstones formed on a prograding marine shelf with traps less than 10 ft thick. Shallow production depths make this play economically advantageous to small and medium-sized companies.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/11022019106 Reservoir geology of the Berea Sandstone (uppermost Devonian), eastern Kentucky
 
Molecular and isotopic composition of natural gas from the Berea Sandstone and Ohio Shale are used to infer the source of gas and thermal maturity conditions under which it was generated. Migration along with basin uplift after the Alleghany orogeny may have contributed to a gas phase that exsolved from oil.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/10142019103 Molecular and isotopic gas composition of the Devonian Berea Sandstone and implications for gas evolution, eastern Kentucky
 
Oils from the Upper Devonian Berea Sandstone, northeastern Kentucky, are from a single family and a similar source rock. The most likely source rocks are the Devonian to Mississippian black shales with significant lateral migration. Nearby immature source rocks do not contribute to the hydrocarbons.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/08192019077 Oil–source correlation studies in the shallow Berea Sandstone petroleum system, eastern Kentucky
 
Organic-rich shale from the Berea Sandstone in Kentucky and Ohio are high in sulfur and dominated by liptinite macerals. Because oil migrated from more to less thermally mature areas, the occurrence of petroleum liquids cannot be predicted directly from conventional thermal maturity proxies.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/09242019089 Organic petrology and geochemistry of the Sunbury and Ohio Shales in eastern Kentucky and southeastern Ohio
 
Organic matter in the Ohio and Marcellus Shales in the central Appalachian Basin was primarily derived from marine algae. This paper demonstrates local to short-distance (<50 mi) lateral migration for emplacement of Devonian-sourced oils into Devonian reservoirs of eastern Ohio.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/08192019076 Organic geochemistry and petrology of Devonian shale in eastern Ohio: Implications for petroleum systems assessment
 
A new phase of development in the Berea Sandstone, northeastern Kentucky, began in 2011. Because of low thermal maturities, oil production was surprising. The current study has shown that the area mature for oil is larger than expected, and that migration has occurred in the updip portions of the play.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/09242019246 Berea Sandstone: New developments in a mature oil and gas play, eastern Kentucky and Ohio
 
The risk of injection-induced earthquakes is managed through buffer zones around previously mapped faults.  However, decades-old fault identification using now obsolete methods could misidentify other features as faults.   Regulations should take vintage surveys into account.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/07202019242 Induced seismicity risk management: The problem of disappearing faults
 
The diatomaceous reservoirs of the San Joaquin Valley, California, have puzzling features. They are continuously oil-saturated with poorly defined oil–water contacts. The best producers have the best oil saturations. The five reservoirs in this study do not represent a single homogenous group and have clear differences.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/07142018253 Characterization of five unconventional diatomaceous (opal-A) reservoirs, Monterey Formation, San Joaquin Valley, California
 
Declining history of oil production of oil pools in Alberta, Canada, can be divided into two phases: a short (4-11 yr) substantially declining phase and a long (25-35 yr) gradually declining phase. Both can be described by power regressions with high correlation coefficients of 0.95-0.99.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/08122019100 Life span of oil reservoirs: Examples from three old reef pools in Alberta, Canada
 
In the Junggar Basin, accumulations in the sandy conglomerate formed in distributary channels of the fan-delta front, and reservoir quality was controlled by differential diagenesis caused by detrital feldspar content, paleogeotemperature, and formation fluids. Few studies have investigated this type of trap.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn19165f5-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/07202017327 Origin and charging histories of diagenetic traps in the Junggar Basin
Recently Added in Interpretation

Recently Added in Environmental Geosciences
 
Urbanization modifies the natural water cycle. In this study, a weighted-rating multicriteria analysis was adopted to quantify the runoff index and to assess the impact of urbanization on the water cycle.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.01241817015 Quantitative assessment of the runoff index in an urbanized watershed
 
To better understand controls on the origin and evolution of brackish groundwater, the hydrogeochemistry of brackish groundwaters was studied within the Triassic Dockum Group across the Midland Basin in Texas. The suitability of Dockum Aquifer water for use in hydraulic fracturing fluid was examined because the area overlies the largest and most productive tight oil province in the United States.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.01241817017 Hydrogeochemical controls on brackish groundwater and its suitability for use in hydraulic fracturing: The Dockum Aquifer, Midland Basin, Texas
 
Groundwater is water located beneath the ground surface in soil pore spaces and in the fractures of lithologic formations. The advent of remote sensing and geographic information systems (GIS) has opened up new vistas in groundwater prospect evaluation, exploration, and management.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.01241817010 Groundwater resources evaluation using geospatial technology
 
Integrated petrographic and chemostratigraphic studies have enabled the identification of sequence boundaries, sequence stratigraphy, and their system tracts for the Lower Cretaceous strata of the Kurnub Group (Jordan); the latter is underlain by the Jurassic (Callovian) strata and overlain by the Cretaceous (Cenomanian).
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.01241817012 Facies associations and chemostratigraphy of the Lower Cretaceous Kurnub Group and their boundaries, King Talal Dam section, northwestern Jordan
 
To achieve reclamation certification, oil-and-gas operations in Alberta, Canada are required to monitor the revegetation of idle well pads that no longer support operations. Currently, monitoring is completed by oblique, helicopter-collected photography and on-the-ground field surveys.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.07071717001 High-resolution satellite imagery applied to monitoring revegetation of oil-sands-exploration well pads
 
A dramatic increase in unconventional drilling that utilizes hydraulic fracturing to extract oil/gas over the past decade has led to concern over handling and management of produced/flowback water (PFW; hydraulic-fracturing wastewater) because the potential exists for its accidental release into the environment.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.06191716501 Strontium isotopes as a potential fingerprint of total dissolved solids associated with hydraulic-fracturing activities in the Barnett Shale, Texas
 
Development of geothermal energy in sedimentary basins is an attractive option given the availability of data from the oil and gas industry. Previous geothermal studies in sedimentary basins have focused on temperatures and petrophysical properties.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.0206171600917003 Geothermal energy potential of the Western Canada Sedimentary Basin: Clues from coproduced and injected water
 
The stress regime in the Illinois Basin was investigated to assess how the rock column might respond to the injection of fluids, including coproduced formation brines and supercritical CO2.This response is a concern because injection practices could increase pore fluid pressure and potentially induce seismicity.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.0206171600817004 State of stress in the Illinois Basin and constraints on inducing failure
 
This study demonstrates the application of aeromagnetic surveys for locating late 1800s-era oil and gas wells in Hillman State Park. The study area in southwestern Pennsylvania offered several unique challenges to locating legacy wells.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.1221161600417009 Methods and challenges to locating legacy wells in western Pennsylvania: Case study at Hillman State Park
 
Surface and airborne gas monitoring programs are becoming an important part of environmental protection in areas favorable for subsurface storage of carbon dioxide. Understanding structural architecture and its effects on the flux of fluids, specifically CO2 and CH4, in the shallow subsurface and atmosphere is helping with designing and implementing next-generation monitoring technologies, including unmanned aerial vehicles (UAVs).
Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/images/_meta/meta_DEG_200x200.png?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true&format=jpg 10.1306/eg.1221161600317002 Structural architecture of the Farnsworth oil unit: Implications for geologic storage of carbon dioxide

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