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Recently Added in Bulletin
 
Carboniferous coals and shales of the Alacaağzı, Kozlu, and Karadon Formations of the western Black Sea Basin of Turkey, have potential for unconventional hydrocarbons. Low oil saturation indexes, however, may explain why coalbed methane exploration wells failed to produce.
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 10.1306/02262017372 Natural fracture, cleat, and strong adsorption impact on low oil and condensate retention in the Carboniferous shales and coals of the western Black Sea Basin of Turkey
 
Natural fractures in the volcanic rocks of the Xujiaweizi depression, Songliao Basin, China have been analyzed and the findings are reported in this paper. Tectonic fractures at angles less than 30° have higher gas production as they are under less compressive stress and make the best fluid flow pathways in the reservoir.
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 10.1306/05122017169 Natural fractures in tight gas volcanic reservoirs and their influences on production in the Xujiaweizi depression, Songliao Basin, China
 
An integrated approach based on combined sequence stratigraphy, sedimentology, and organic geochemistry was carried out to identify and assess the effective source rocks of recent oil discoveries in the North Yellow Sea Basin, eastern China. These results are significant to future exploration here and in similar environments.
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 10.1306/05212019072 An integrated sequence stratigraphic–geochemical investigation of the Jurassic source rocks in the North Yellow Sea Basin, eastern China
 
The Getty 1 Lloyd Hurt core in LaSalle County, southern Texas, provides rock data through the complete Austin Chalk section to produce a strong geologic characterization. Five lithofacies were defined that can be used to evaluate source-rock and reservoir quality as well as clay content.
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 10.1306/04222019197 Geologic characterization of the type cored section for the Upper Cretaceous Austin Chalk Group in southern Texas: A combination fractured and unconventional reservoir
 
The petroleum systems of the Malargüe fold-thrust belt, Argentina, are the subject of extensive modeling to reconstruct the evolution of its petroleum systems. In the outer regions and areas to the east, half of the initial source potential has been spent. Thermal maturity increases with stratigraphic age.
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 10.1306/05082018171 Tectonic control on hydrocarbon generation in the northwestern Neuquén Basin, Argentina
 
An integrated approach to reservoir characterization of the Tar Springs Formation, a mature basin reaching the end of its production history is described. This approach requires a thorough understanding of the heterogeneous facies distribution as well as the different types of clay minerals.
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 10.1306/02282019156 Integrated reservoir characterization of enhanced oil recovery targets in mature basins: An example from the Tar Springs Formation, Rock Hill field, Illinois Basin, United States
 
This study focuses on the origin of dolomite precipitation with reference to deeply buried sublacustrine fan sandstones. It provides an opportunity to examine geochemical interactions between organic biodegradation kinetics and local inorganic minerals in microbial sulfate reduction.
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 10.1306/10191918225 Microbially induced dolomite precipitates in Eocene lacustrine siliciclastic sequences in the Dongying depression, Bohai Bay Basin, China: Evidence from petrology, geochemistry, and numerical modeling
 
The Morro Vermelho karst system, Brazil, provides a case study of cave formation in which the interplay between tectonics, hydrochemistry, karstification, precipitation, dolomitization, and silica deposition resulted in a unique cave that has no parallel in Brazil and beyond.
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 10.1306/05212019150 The Morro Vermelho hypogenic karst system (Brazil): Stratigraphy, fractures, and flow in a carbonate strike-slip fault zone with implications for carbonate reservoirs
 

Sediment from the two characteristic lithofacies present in the Green Canyon Block 955 hydrate reservoir were reconstituted to the approximate state they were at in the subsurface. Sandy silts reconstituted to the in situ porosity have a permeability of 11.8 md while clayey silts have a much lower intrinsic permeability.

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 10.1306/01062019165 Petrophysical properties of the Green Canyon Block 955 hydrate reservoir inferred from reconstituted sediments: Implications for hydrate formation and production
 
A coarse-grained hydrate reservoir in Green Canyon Block 955 in the deep-water Gulf of Mexico was pressure cored during The University of Texas-Gulf of Mexico 2-1 (UT-GOM2-1) Hydrate Pressure Coring Expedition. This paper summarizes findings to date. Results will help future simulation models determine how these reservoirs form.
American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/bltn18240-cover-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10.1306/05212019052 Pressure coring a Gulf of Mexico deep-water turbidite gas hydrate reservoir: Initial results from The University of Texas–Gulf of Mexico 2-1 (UT-GOM2-1) Hydrate Pressure Coring Expedition
Recently Added in Interpretation

Recently Added in Environmental Geosciences
 
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
 
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
 
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
 
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
 
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
 
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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