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Sedimentology and Stratigraphy

Explorer Article

Joshua Rosenfeld’s article in the April EXPLORER issue’s Historical Highlights provides an interesting compilation of observations selected to support an unproven hypothesis: that the large influx of Paleogene Wilcox sandstones in the Gulf of Mexico can be linked to a major evaporative drawdown of the basin, loosely aligned with and possibly triggering the Paleocene-Eocene thermal event. We offer our observations based on decades of oil industry experience working the Wilcox play, more than 55 peer- reviewed academic papers and one book on Gulf of Mexico sedimentary basin.

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American Association of Petroleum Geologists (AAPG)
Asia Pacific Blog

A report on a field trip taken by the UPES AAPG Student Chapter on 1 February 2020 along the Raipur - Maldevta Section of the eastern Doon Valley

American Association of Petroleum Geologists (AAPG)
Explorer Article

The Rocky Mountain Section of AAPG is pleased to announce the winners of its Presentation Awards for the section’s 2019 Annual Conference which was held in Cheyenne, Wyo. The Presentation Awards are given to those who present the best technical papers at the annual meeting. Authors gave more than 125 oral and poster presentations on the geology of the Rocky Mountain region at the Cheyenne meeting. Judging on technical merit and presentation determined the winners.

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American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

It all started in 2002, when Unocal revealed that its Trident-1 well had found 400 meters of 70-percent net Lower Wilcox Formation sand in the deepwater Gulf of Mexico, about 400 kilometers beyond the contemporaneous shelf break offshore south Texas. Art Berman and I gazed at a GOM activity map and pondered how that amount of sand could have been deposited so far out into the basin. Our working hypothesis was that this sand deposit was due to a drop in base level, but we also knew that the worldwide sea level was not in decline at that time. A log of the nearby Shell Great White well shows that this sand deposition began suddenly and ended suddenly. This was also puzzling, since we were trained to expect gradational coarsening-upward bedding during regression and fining-upward during transgression, rather than the sharp contacts we were seeing. Sudden avulsion of a major river in a deltaic environment could produce something like this, but how could it happen far beyond the shelf edge?

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American Association of Petroleum Geologists (AAPG)
Explorer Article

The history of the Permian Basin reads like a detective novel in reverse. Geoscientists know how the story turns out. They’re trying to determine exactly how it started. Robert Stern, a professor of geosciences at the University of Texas at Dallas, thinks he and a group of fellow scientists have solved one important part of the mystery. Stern. “We know oil is limited by the nutrients. Oil just doesn’t suddenly appear,” he said. That raises the question, “How did all those nutrients get there?”

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American Association of Petroleum Geologists (AAPG)
Latin America Blog

The Geology and Hydrocarbon Potential of the Circum-Gulf of Mexico Pre-Salt Section convened 101 participants came from 9 countries from 52 companies and organizations

American Association of Petroleum Geologists (AAPG)
Explorer Article

Energy sustainability and environmental responsibility are major pillars for the future of the energy industry. They will also be important themes for the upcoming Pacific Section Annual Meeting April 4-8 in Oxnard, Calif. The meeting’s overall theme is “2020 Vision: Producing the Future.

American Association of Petroleum Geologists (AAPG)
Explorer Article

AAPG Honorary Member and University of Oklahoma geoscience professor Roger Slatt speaks to the vital yet dwindling role of research consortia in advancing education and scientific advancement.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

It is one of the most remote places on the planet and home to the largest sand desert in the world. Virtually uninhabited and underexplored, the Rub’ al Khali basin, known as “the Empty Quarter” in Arabic, covers more than a fourth of the southeastern part of the Saudi Arabian peninsula. While the area has been explored in the past, perhaps most notably by Max Steineke, the American geologist known for making the first oil discovery in Saudi Arabia in 1938, and then publicly again in the early 2000s by international oil companies, the basin appears to be of increasing interest once more.

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American Association of Petroleum Geologists (AAPG)
Middle East Blog

After two successful editions, the AAPG Carbonate Reservoirs of the Middle East GTW came back the region for a third round. The event took place from 28-29 January 2020 at the Westin Abu Dhabi Golf Resort & Spa. The workshop attracted 94 attendees from 30 different companies and 10 different countries.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 23 July 2009, 12:00 a.m.–12:00 a.m.

As commodity prices have dropped, many shale plays have become uneconomical as statistical plays and have increasingly become recognized as geological plays demanding new insights from data.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 29 April 2010, 12:00 a.m.–12:00 a.m.

This presentation will focus on the seismic stratigraphic and seismic geomorphologic expression of deep-water deposits, including both reservoir and non-reservoir facies.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Thursday, 24 September 2020, 8:30 p.m.–9:30 p.m.

In the past 3 decades the sequence stratigraphy jargon has proliferated, resulting in multiple definitions of the same surface or new surfaces and units based on drawings of deposition in response to relative changes in sea level. The close association between base-level changes, the formation of surfaces, and specific stratal stacking that define systems tracts are at the heart of the confusion. This webinar is proposed a back-to-basics approach, emphasizing key observations that can be made from any geologic data: lithofacies, lithofacies association, vertical stacking, stratal geometries, and stratal terminations.

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American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 28 April 2011, 12:00 a.m.–12:00 a.m.

The Niobrara Petroleum System of the U.S. Rocky Mountain Region is a major tight petroleum resource play.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 19 August 2010, 12:00 a.m.–12:00 a.m.

This presentation will show where there are cases of missing sections, but none of them can be attributed to normal faulting.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Thursday, 19 November 2020, 11:00 a.m.–12:00 p.m.

Hear John Kaldi speak about Integrated Approaches to Determining Net Pay: Caveats & Lessons Learned. Webinar presented via Zoom on Thursday 19 November 2020 at 11:00 SGT (GMT+8) Singapore time.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Tuesday, 5 May 2020, 12:00 p.m.–1:00 p.m.

Sequence stratigraphy is a method for stratigraphic interpretation, pioneered by Vail and colleagues in the mid 70’s, which explains the complex geometries that sediments create as they fill accommodation in response to changes in rates of sedimentation, subsidence, uplift and eustasy. This method was developed based on observations and concepts developed as early as in the 1800’s. Based on this strong scientific foundation, pioneer work from Caster, Sloss, Wheeler, Campbell, and Asquith established the basis for the methodology. These researchers established a new way to correlate stratigraphic units, demonstrating the time-transgressive nature of lithostratigraphic formations.

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American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 8 December 2011, 12:00 a.m.–12:00 a.m.

This e-symposium focuses on methods for predicting connectivity within clastic fluvial systems.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 9 February 2012, 12:00 a.m.–12:00 a.m.

Projects in several shales will be discussed, including Marcellus, Eagle Ford, Haynesville, Fayetteville, Montney, and Barnett, as will several seismically-detectable drivers for success including lithofacies, stress, pre-existing fractures, and pore pressure.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Wednesday, 14 April 2021, 7:00 p.m.–8:30 p.m.

Join us for 'Pivoting 2021: Energy Industry Supply Chains'. Panelists will discuss some of the most prominent advances in supply chain practice, including provenance, authenticity assurance, blockchain, automation, multiple sourcing, and 3D printing. Webinar will be presented via Zoom 7pm - 8:30pm CDT, 14 April 2021.

American Association of Petroleum Geologists (AAPG)
DL Abstract

As oil and gas exploration and production occur in deeper basins and more complex geologic settings, accurate characterization and modeling of reservoirs to improve estimated ultimate recovery (EUR) prediction, optimize well placement and maximize recovery become paramount. Existing technologies for reservoir characterization and modeling have proven inadequate for delivering detailed 3D predictions of reservoir architecture, connectivity and rock quality at scales that impact subsurface flow patterns and reservoir performance. Because of the gap between the geophysical and geologic data available (seismic, well logs, cores) and the data needed to model rock heterogeneities at the reservoir scale, constraints from external analog systems are needed. Existing stratigraphic concepts and deposition models are mostly empirical and seldom provide quantitative constraints on fine-scale reservoir heterogeneity. Current reservoir modeling tools are challenged to accurately replicate complex, nonstationary, rock heterogeneity patterns that control connectivity, such as shale layers that serve as flow baffles and barriers.

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Request a visit from Tao Sun!

American Association of Petroleum Geologists (AAPG)
VG Abstract

The carbonate sequences that were deposited in the now exhumed Tethyan Ocean influence many aspects of our lives today, either by supplying the energy that warms our homes and the fuel that powers our cars or providing the stunning landscapes for both winter and summer vacations. They also represent some of the most intensely studied rock formations in the world and have provided geoscientists with a fascinating insight into the turbulent nature of 250 Million years of Earth’s history. By combining studies from the full range of geoscience disciplines this presentation will trace the development of these carbonate sequences from their initial formation on the margins of large ancient continental masses to their present day locations in and around the Greater Mediterranean and Near East region. The first order control on growth patterns and carbonate platform development by the regional plate-tectonic setting, underlying basin architecture and fluctuations in sea level will be illustrated. The organisms that contribute to sequence development will be revealed to be treasure troves of forensic information. Finally, these rock sequences will be shown to contain all the ingredients necessary to form and retain hydrocarbons and the manner in which major post-depositional tectonic events led to the formation of some of the largest hydrocarbon accumulations in the world will be demonstrated.

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Request a visit from Keith Gerdes!

American Association of Petroleum Geologists (AAPG)

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