Recently Added in Journals
We use sediment ages and mercury (Hg) concentrations to estimate past and future concentrations in the South River, Virginia, where Hg was released between 1930 and 1950 from a manufacturing process related to nylon production. In a previous study, along a 40 km (25 mi) reach, samples were collected from 26 of 54 fine-grained deposits that formed in the lee of large wood obstructions in the channel and analyzed for grain size, Hg concentration, and organic content. We also obtained radiometric dates from six deposits. To create a history that reflects the full concentration distribution (which contains concentrations as high as 900 mg/kg [900 ppm]), here, we treat the deposits as a single reservoir exchanging contaminated sediments with the overlying water column, and assume that the total sediment mass in storage and the distribution of sediment ages are time invariant. We use reservoir theory to reconstruct the annual history of Hg concentration on suspended sediment using data from our previous study and new results presented here. Many different reconstructed histories fit our data. To constrain results, we use information from a well-preserved core (and our estimate of the total mass of Hg stored in 2007) to specify the years associated with the peak concentration of 900 mg/kg. Our results indicate that around 850 kg (1874 lb) of Hg was stored in the deposits between 1955 and 1961, compared to only 80 kg (176 lb) today. Simulations of future Hg remediation suggest that 100-yr timescales will be needed for the South River to remove Hg-contaminated sediments from the channel perimeter through natural processes.
Desktop /Portals/0/PackFlashItemImages/WebReady/hero-EG-Journal-21-1-2014.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 5780

 SONAR, historical and aerial photographs, and vibracoring were used to assess the type and thickness distribution of sediments impounded by Gold Ray Dam on the Rogue River in southern Oregon. From these data, a volume of about 400,000 cubic yards (

Equation EG13006eq1

) of sediment was determined for the inundated area of the reservoir.

Overall, sediment volumes in the impounded part of the reservoir were less than expected. There are three possibilities that may explain the perceived absence of sediment: (1) the gradient of the Rogue River in this stretch is less, and therefore sediment yields are less; (2) the extraction of gravels and/or other impediments upstream decreased the availability of sediments delivered into the reservoir; and/or (3) sediment was deposited by a prograding delta that filled in the inundated area of the floodplain upstream from Gold Ray Dam. The amount of sediment deposited on this inundated floodplain may have been as much as 1,800,000 cubic yards (Equation EG13006eq2), bringing the total amount of sediment impounded by Gold Ray Dam to Equation EG13006eq3 yards (Equation EG13006eq4).

Applied sedimentology is not only vital to developing a depositional model for the filling of a reservoir, but also providing insights into depositional and erosional changes that will occur upon the removal of a dam. In particular, the processes of delta formation, reoccupation of abandoned channels, and avulsion are paramount in determining sediment accumulation and distribution in reservoirs.

Desktop /Portals/0/PackFlashItemImages/WebReady/hero-EG-Journal-21-1-2014.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 5779

Diagenesis significantly impacts mudstone lithofacies. Processes operating to control diagenetic pathways in mudstones are poorly known compared to analogous processes occurring in other sedimentary rocks. Selected organic-carbon-rich mudstones, from the Kimmeridge Clay and Monterey Formations, have been investigated to determine how varying starting compositions influence diagenesis.

Desktop /Portals/0/PackFlashItemImages/WebReady/compositional-controls-on-early-diagenetic-pathways.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 7969

Umiat field in northern Alaska is a shallow, light-oil accumulation with an estimated original oil in place of more than 1.5 billion bbl and 99 bcf associated gas. The field, discovered in 1946, was never considered viable because it is shallow, in permafrost, and far from any infrastructure. Modern drilling and production techniques now make Umiat a more attractive target if the behavior of a rock, ice, and light oil system at low pressure can be understood and simulated.

The Umiat reservoir consists of shoreface and deltaic sandstones of the Cretaceous Nanushuk Formation deformed by a thrust-related anticline. Depositional environment imparts a strong vertical and horizontal permeability anisotropy to the reservoir that may be further complicated by diagenesis and open natural fractures.

Experimental and theoretical studies indicate that there is a significant reduction in the relative permeability of oil in the presence of ice, with a maximum reduction when connate water is fresh and less reduction when water is saline. A representative Umiat oil sample was reconstituted by comparing the composition of a severely weathered Umiat fluid to a theoretical Umiat fluid composition derived using the Pedersen method. This sample was then used to determine fluid properties at reservoir conditions such as bubble point pressure, viscosity, and density.

These geologic and engineering data were integrated into a simulation model that indicate recoveries of 12%–15% can be achieved over a 50-yr production period using cold gas injection from five well pads with a wagon-wheel configuration of multilateral wells.

Desktop /Portals/0/PackFlashItemImages/WebReady/Integrated-reservoir-characterization-and-simulation-of.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 7968

The presence of hydrocarbon-bearing sandstones within the Eocene of the Forties area was first documented in 1985, when a Forties field (Paleocene) development well discovered the Brimmond field. Further hydrocarbons in the Eocene were discovered in the adjacent Maule field in 2009. Reservoir geometry derived from three-dimensional seismic data has provided evidence for both a depositional and a sand injectite origin for the Eocene sandstones. The Brimmond field is located in a deep-water channel complex that extends to the southeast, whereas the Maule field sandstones have the geometry of an injection sheet on the updip margin of the Brimmond channel system with a cone-shape feature emanating from the top of the Forties Sandstone Member (Paleocene). The geometry of the Eocene sandstones in the Maule field indicates that they are intrusive and originated by the fluidization and injection of sand during burial. From seismic and borehole data, it is unclear whether the sand that was injected to form the Maule reservoir was derived from depositional Eocene sandstones or from the underlying Forties Sandstone Member. These two alternatives are tested by comparing the heavy mineral and garnet geochemical characteristics of the injectite sandstones in the Maule field with the depositional sandstones of the Brimmond field and the Forties sandstones of the Forties field.

The study revealed significant differences between the sandstones in the Forties field and those of the Maule and Brimmond fields), both in terms of heavy mineral and garnet geochemical data. The Brimmond-Maule and Forties sandstones therefore have different provenances and are genetically unrelated, indicating that the sandstones in the Maule field did not originate by the fluidization of Forties sandstones. By contrast, the provenance characteristics of the depositional Brimmond sandstones are closely comparable with sandstone intrusions in the Maule field. We conclude that the injectites in the Maule field formed by the fluidization of depositional Brimmond sandstones but do not exclude the important function of water from the huge underlying Forties Sandstone Member aquifer as the agent for developing the fluid supply and elevating pore pressure to fluidize and inject the Eocene sand. The study has demonstrated that heavy mineral provenance studies are an effective method of tracing the origin of injected sandstones, which are increasingly being recognized as an important hydrocarbon play.

Desktop /Portals/0/PackFlashItemImages/WebReady/constraining-the-origin-of-reservoirs-formed.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 7966

Interpretation of seismic data from the Sorvestsnaget Basin, southwest Barents Sea, demonstrates gradual middle Eocene basin infilling (from the north) generated by southward-prograding shelf-margin clinoforms. The basin experienced continued accommodation development during the middle Eocene because of differential subsidence caused by the onset of early Eocene sea-floor spreading in the Norwegian-Greenland Sea, faulting, salt movement, and different tectonic activity between the Sorvestsnaget Basin and Veslemoy high. During this time, the margin shows transformation from an initially high-relief margin to a progradation in the final stage. The early stage of progradation is characterized by the establishment of generally oblique clinoform shifts creating a flat shelf-edge trajectory that implies a gentle falling or stable relative sea level and low accommodation-to-sediment supply ratio (lt1) in the topsets. During the early stage of basin development, the high-relief margin, narrow shelf, stable or falling relative sea level, seismicity, and presumably high sedimentation rate caused accumulation of thick and areally extensive deep-water fans. Seismic-scale sandstone injections deform the fans.

A fully prograding margin developed when the shelf-to-basin profile lowered, apparently because of increased subsidence of the northern part. This stage of the basin development is generally characterized by the presence of sigmoid clinoform shifts creating an ascending shelf-edge trajectory that is implying steady or rising relative sea level with an accommodation-to-sediment supply ratio of greater than 1, implying sand accumulation on the shelf. This study suggests that some volume of sand was transported into the deep water during relative sea level rise considering the narrow shelf and inferred high rates of sediment supply.

Desktop /Portals/0/PackFlashItemImages/WebReady/evolution-of-shelf-margin-clinoforms-and.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 7965
Organic-carbon–rich shales of the lower Marcellus Formation were deposited at the toe and basinward of a prograding clinothem associated with a Mahantango Formation delta complex centered near Harrisburg, Pennsylvania. Distribution of these organic-carbon–rich shales was influenced by shifts in the delta complex driven by changes in rates of accommodation creation and by a topographically high carbonate bank that formed along the Findlay-Algonquin arch during deposition of the Onondaga Formation. Specifically, we interpret the Union Springs member (Shamokin Member of the Marcellus Formation) and the Onondaga Formation as comprising a single third-order depositional sequence. The Onondaga Formation was deposited in the lowstand to transgressive systems tract, and the Union Springs member was deposited in the transgressive, highstand, and falling-stage systems tract. The regional extent of parasequences, systems tracts, and the interpreted depositional sequence suggest that base-level fluctuations were primarily caused by allogenic forcing—eustasy, climate, or regional thermal uplift or subsidence—instead of basement fault reactivation as argued by previous workers. Paleowater depths in the region of Marcellus Formation black mudrock accumulation were at least 330 ft (100 m) as estimated by differences in strata thickness between the northwestern carbonate bank and basinal facies to the southeast. Geochemical analysis indicates anoxic to euxinic bottom-water conditions. These conditions were supported by a deep, stratified basin with a lack of circulation.
Desktop /Portals/0/PackFlashItemImages/WebReady/sequence-stratigrapy-and-depositional-environments-of.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 7963
We use three-dimensional seismic reflection data and new map-based structural restoration methods to define the displacement history and characteristics of a series of tear faults in the deep-water Niger Delta. Deformation in the deep-water Niger Delta is focused mostly within two fold-and-thrust belts that accommodate downdip shortening produced by updip extension on the continental shelf. This shortening is accommodated by a series of thrust sheets that are locally cut by strike-slip faults. Through seismic mapping and interpretation, we resolve these strike-slip faults to be tear faults that share a common detachment level with the thrust faults. Acting in conjunction, these structures have accommodated a north –south gradient in westward-directed shortening. We apply a map-based restoration technique implemented in Gocad to restore an upper stratigraphic horizon of the late Oligocene and use this analysis to calculate slip profiles along the strike-slip faults. The slip magnitudes and directions change abruptly along the lengths of the tear faults as they interact with numerous thrust sheets. The discontinuous nature of these slip profiles reflects the manner in which they have accommodated differential movement between the footwall and hanging-wall blocks of the thrust sheets. In cases for which the relationship between a strike-slip fault and multiple thrust faults is unclear, the recognition of this type of slip profile may distinguish thin-skinned tear faults from more conventional deep-seated, throughgoing strike-slip faults.
Desktop /Portals/0/PackFlashItemImages/WebReady/Geometry,-kinematics,-and-displacement-characteristics-of.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 7962

Offshore sequences of volcaniclastic rocks (such as hyaloclastite deposits) are poorly understood in terms of their rock properties and their response to compaction and burial. As petroleum exploration targets offshore volcanic rifted margins worldwide, understanding of volcanic rock properties becomes important both in terms of drilling and how the rocks may behave as seals, reservoirs, or permeability pathways. The Hawaiian Scientific Drilling Project phase II in 2001 obtained a 3 km-(2-mi)-long core of volcanic and volcaniclastic rocks that records the emergence of the largest of the Hawaiian islands. Core recovery of 2945 m (9662 ft) resulted in an unparalleled data set of volcanic and volcaniclastic rocks. Detailed logging, optical petrology, and major element analysis of two sections at depths 1831–1870 and 2530–2597 m (6007–6135 and 8300–8520 ft) are compared to recovered petrophysical logs (gamma ray, resistivity, and P-wave velocity). This study concludes deviation in petrophysical properties does not seem to correlate to changes in grain size or clast sorting, but instead correlates with alteration type (zeolite component) and bulk mineralogy (total olivine phenocryst percentage component). These data sets are important in helping to calibrate well-log responses through hyaloclastite intervals in areas of active petroleum exploration such as the North Atlantic (e.g., Faroe-Shetland Basin, United Kingdom, and Faroe Islands, the Norwegian margin and South Atlantic margins bordering Brazil and Angola).

Desktop /Portals/0/PackFlashItemImages/WebReady/the-petrophysical-and-petrographical-properties-of.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 7961

The petroleum trap for the Athabasca oil sands has remained elusive because it was destroyed by flexural loading of the Western Canada Sedimentary Basin during the Late Cretaceous and Paleocene. The original trap extent is preserved because the oil was biodegraded to immobile bitumen as the trap was being charged during the Late Cretaceous. Using well and outcrop data, it is possible to reconstruct the Cretaceous overburden horizons beyond the limit of present-day erosion. Sequential restoration of the reconstructed horizons reveals a megatrap at the top of the Wabiskaw-McMurray reservoir in the Athabasca area at 84 Ma (late Santonian). The megatrap is a four-way anticline with dimensions 285 x 125 km (177 x 78 mi) and maximum amplitude of 60 m (197 ft). The southeastern margin of the anticline shows good conformance to the bitumen edge for 140 km (87 mi). To the northeast of the anticline, bitumen is present in a shallower trap domain in what is interpreted to be an onlap trap onto the Canadian Shield; leakage along the onlap edge is indicated by tarry bitumen outliers preserved in basement rocks farther to the northeast. Peripheral trap domains that lie below the paleospillpoint, in northern, southern, and southwestern Athabasca, and Wabasca, are interpreted to represent a late charge of oil that was trapped by bitumen already emplaced in the anticline and the northeastern onlap trap. This is consistent with kimberlite intrusions containing live bitumen, which indicate that the northern trap domain was charged not before 78 Ma. The trap restoration has been tested using bitumen-water contact well picks. The restored picks fall into groups that are consistent both with the trap domains determined from the top reservoir restoration and the conceptual charge model in which the four-way anticline was filled first, followed by the northeastern onlap trap, and then the peripheral trap domains.

Desktop /Portals/0/PackFlashItemImages/WebReady/athabasca-soil-sands--megatrap-restoration-and.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 7959
«« First « Previous |1 2 3 4 5 6 7 8 9 | Last ››
Recently Added in News
Vlastimila “Vlasta” Dvorakova, a former president of the AAPG Europe Region and an important leader in AAPG regional and international activities, died Friday, June 12, after a long illness. She was 55.
Desktop /Portals/0/PackFlashItemImages/WebReady/dvorakova-vlastimila.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20842
Anny Coury’s is a personal story: A love of geology, sure, and the people in it, but a story, more importantly, of survival and modesty, one that goes back to the 1930s and early ’40s, when, as a young girl and along with her family, fled from the Nazis through Europe.
Desktop /Portals/0/PackFlashItemImages/WebReady/coury-a-story-of-survival-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20377
The number of Grants-in-Aid applications for this year’s cycle of awards once again was tremendous. The Foundation is awarding $239,000 to 121 master’s and doctoral students studying various fields of geoscience – more than any year before in number of dollars granted.
Desktop /Portals/0/PackFlashItemImages/WebReady/rock-solid-volunteers-ensure-grants-in-aid-success-in-2015-hero.JPG?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20405
AAPG Europe’s latest Geosciences Technology Workshop (GTW), “Fractured Reservoirs: The Geological, Geophysical and Engineering Tools to Crack Them,” provided the opportunity to visit the island of Sicily, steeped both in beauty and an active geological history. And what is a trip to Sicily without a visit to the tallest volcano in Europe?
Desktop /Portals/0/PackFlashItemImages/WebReady/gtw-side-trip-goes-inside-the-volcanology-of-mt-etna-hero.JPG?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20393
This is the story of the drilling of a costly ($60 million) Lahee A-1 well in the Colombian foothills, which presented significant deviations from the prognosticated stratigraphy halfway to the objective – and became an operational nuisance. Nonetheless, it is mainly a story of successful management and prompt response to the geological uncertainty.
Desktop /Portals/0/PackFlashItemImages/WebReady/a-surprise-in-the-colombian-foothills-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20373
Concerns over aging or inadequate infrastructure and changes in the energy mix led the Obama administration to focus the first Quadrennial Energy Review (QER) on transmission, storage and distribution infrastructure.
Desktop /Portals/0/PackFlashItemImages/WebReady/explorer-cover-2015-06jun.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20392
In last month’s Geophysical Corner `we described the different poststack impedance inversion methods that are available in our seismic industry. In poststack seismic inversion – where there is no mode conversion at normal incidence – it is purely acoustic. P-wave impedance is the only information that can be estimated from poststack inversion of P-wave data.
Desktop /Portals/0/PackFlashItemImages/WebReady/impedance-Inversions-value-in-interpretation-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20371
This seems to be the way public opinion is shaped on most any hot topic: There is quite a bit of early, incomplete information to feed the public’s interest, and this early activity disproportionately shapes society’s attitude and ultimate response.
Desktop /Portals/0/PackFlashItemImages/WebReady/explorer-cover-2015-06jun.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20370
I don’t want to completely dismiss the role of flashes of insight. But to borrow an old saw, we may miss scientific discoveries because they’re dressed in overalls and disguised as hard work.
Desktop /Portals/0/PackFlashItemImages/WebReady/explorer-cover-2015-06jun.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20369
Oil prices were at near record highs when I became AAPG president almost exactly one year ago – and immediately thereafter they began to fall.
Desktop /Portals/0/PackFlashItemImages/WebReady/explorer-2015-06jun-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20367
«« First « Previous |1 2 3 4 ... 258 259 260 261 262 263 264 | Last ››
Recently Added Special Publications
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/products/GSLpc1267_450.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 16534
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.
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/products/DPpc1265_450.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 16536
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.
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/products/DPpc1264_450.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 16537
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.
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/products/DPpc1271R_450.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 20787
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.
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/products/FOPpc1262_450.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 12823
This publication is a comprehensive overview of NGLs from production in the oil patch to consumption in the fuel and petrochemical industries.
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/products/M109bookpc1250_450.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 17763
This memoir is designed as a practical guide for students and professionals to learn the fundamentals of microscopic examination of sandstones, mudrocks, and associated rocks. With more than 1100 color illustrations, it covers the identification of grains, textures, and structures of clastic terrigenous rocks as well as their diagenetic alteration (compaction, cementation, dissolution, and replacement) and porosity reduction or enhancement. It also provides classification diagrams for formal description of those rocks and their porosity.
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.
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/aapg_products_icon_200px.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 12766
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/products/Bulletinpc1260_450.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 12466
Contributions to this Special Issue highlight the importance of understanding the full geological context of self-sourced "resource" plays.
Desktop http://img.aapg.org/remote/store-assets.aapg.org/img/products/Bullpc1259_450.jpg?width=100&height=100&mode=pad&bgcolor=white&quality=90amp;encoder=freeimage&progressive=true&scale=both 12465
This special issue of the AAPG Bulletin honors the legacy of J. Fred Read, a pioneer in carbonate sedimentology and stratigraphy
«« First « Previous |1 2 3 4 ... 135 136 137 138 139 140 141 | Last ››
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.
Desktop /Portals/0/images/_site/AAPG-newlogo-vertical-morepadding.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 19955
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.
Desktop /Portals/0/PackFlashItemImages/WebReady/Oil-and-Gas-Fields-and-Pools-of-Pennsylvania-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 19832
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
Desktop /Portals/0/PackFlashItemImages/WebReady/wilcox-group-carrizo-sand-east-central-tx.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 19831
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.
Desktop /Portals/0/PackFlashItemImages/WebReady/Global-Heat-Flow-Database-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 19821

Deltaic depositional facies result from interacting dynamics processes (wave energy, tidal regime, currents, climate, etc.), which modify and disperse riverborne (fluvial) clastic deposits.

Desktop /Portals/0/PackFlashItemImages/WebReady/wiki-deltaic-environments-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 11628

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.

Desktop /Portals/0/PackFlashItemImages/WebReady/wiki-biostratigraphy-in-sequence-stratigraphy-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 11265

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

Desktop /Portals/0/PackFlashItemImages/WebReady/wiki-sandstone-permeability-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 11120

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.

Desktop /Portals/0/PackFlashItemImages/WebReady/wiki-solar-energy-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 11086

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.

Desktop /Portals/0/PackFlashItemImages/WebReady/wiki-seismic-facies-analysis-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10923

An oil shale is defined as a fine-grained sedimentary rock that contains a high proportion of endogenous organic matter (kerogen) mostly insoluble in ordinary petroleum solvents, from which substantial amounts of synthetic oil and/or gas can be extracted by heating it to a sufficiently high temperature, a process called retorting. Oil shales have a low calorific value and high ash and mineral content.

Desktop /Portals/0/PackFlashItemImages/WebReady/wiki-oil-shales-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 10747
«« First « Previous |1 2 3 | Last ››
Recently Added
A team of five Penn State students won second place and $10,000 in the highly competitive, international Imperial Barrel Award (IBA) program, hosted by the American Association of Petroleum Geologists (AAPG) and the AAPG Foundation. More than 1,000 students from 132 teams, representing 36 countries, competed. The five Penn State students, all pursuing master’s degrees in geosciences, were the first team from their regional section (Eastern) to place in the top three overall since the IBA competition started in 2007.
Desktop /Portals/0/PackFlashItemImages/WebReady/trophy_0.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 21088
The Subcommittee on Energy and Mineral Resources, chaired by Representative Doug Lamborn (R-Colo.) recently held a hearing that investigated the environmental risks and economic benefits of Alaska offshore Arctic drilling. Two of the new Arctic offshore regulations attracted the most controversy: the requirement for a standby rig in case of a blowout, and the shortened drilling season. This hearing comes at the same time as Shell mobilizes its equipment for drilling in the Chukchi Sea later this summer. Groups opposed to Arctic drilling recently protested the Polar Pioneer drilling rig’s departure from the Port of Seattle.
Desktop /Portals/0/PackFlashItemImages/WebReady/polar-pioneer-and-protestors-06jun-2015.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20902

With the recent surge in new techniques and technology, as well as new plays put into production, a tremendous opportunity exists in both U.S. and international reservoirs to apply lessons learned to existing reservoirs in order to economically increase production and recoverable reserves.

Desktop /Portals/0/PackFlashItemImages/WebReady/revitalizing-reservoirs-key-questions-to-address-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20935
Desktop /Portals/0/PackFlashItemImages/WebReady/reality-based-reservoir-development.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20924
Last week, the Senate Energy and Natural Resources Committee held a hearing on 42 legislative proposals that are geared toward promoting accountability and reform in current U.S. energy policies. The hearing touched on a broad array of topics, including energy exports, state versus federal authority in energy development, reliability of the electric grid, cybersecurity, as well as reform of federal programs such as the Department of Energy’s (DOE) loan guarantee program and the mission of DOE’s National Labs.
Desktop /Portals/0/PackFlashItemImages/WebReady/senate-energy-committee-expresses-bipartisan-support-research-development-06jun-2015-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20872
The AAPG Latin America Region and the Geological Society of Peru invite participation in “Increasing the Recovery Factor in Mature Oil and Gas Fields,” a Geosciences Technology Workshop (GTW) to be held October 15-16 in Lima, Peru.
Desktop /Portals/0/PackFlashItemImages/WebReady/gtw-peru-2015-increasing-recovery-in-mature-fields-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20475

Network! Get inspired! Join other women of the earth sciences and the men who support them at the AAPG PROWESS-AWG-SEG Networking Reception before the AAPG Annual Convention & Exhibition begins.

Desktop /Portals/0/PackFlashItemImages/WebReady/prowess-2015-networking-event-blog-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20473
As part of Senator Lisa Murkowski’s (R-AK) efforts to craft comprehensive energy legislation, the Senate Energy and Natural Resources Committee recently held a hearing to discuss 26 bills that would expand energy supplies. 
Desktop /Portals/0/PackFlashItemImages/WebReady/senate-energy-and-natural-resources-committee-mullsenergy-supply-legislation-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20391

This year's AAPG Woodford Shale Forum focused on new information and optimization.  Included were presenters from the University of Oklahoma, Halliburton, Black Swan Energy Services, and Devon Energy just to name a few.

Desktop /Portals/0/PackFlashItemImages/WebReady/woodford-shale-2015-hero2.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true 20183
«« First « Previous |1 2 3 4 ... 7 8 9 10 11 12 13 | Last ››


Please check back for more information.