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Sedimentology and Stratigraphy

Explorer Foundation Update

Toshimi Fujikawa, a geology teacher in San Lorenzo, Calif., who has been praised by her peers for passionately helping students to discover knowledge and relevance in the geological world where they live, has been named the 2022 AAPG Foundation’s Teacher of the Year.

American Association of Petroleum Geologists (AAPG)
Explorer Article

With the price of oil hovering well over $100 a barrel, some in the industry are exploring ways to revisit conventional oilfields using technology that emerged during the unconventional oil boom, with a goal of earning a rapid return on investment while prices remain favorable.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Global events of recent years have driven the oil and gas industry to make major changes to its workforce and operations, and the professional and scientific associations that serve the industry have had to evolve and adapt to accommodate those changes, particularly with regard to the programs they offer. The Imperial Barrel Award competition is no exception. An AAPG staple since 2007 and one of the Association’s most prestigious and visible programs, the IBA has undergone multiple changes during the past two years.

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American Association of Petroleum Geologists (AAPG)
Explorer Division Column DEG

After the past year as president of the Division of Environmental Geosciences, my three big takeaways are that the world needs energy, all forms of energy are in transition, and geoscientists are needed to explore for and develop energy – now and in the future. In every future energy scenario, oil and gas will be needed for decades at various levels to contribute to the global energy mix.

American Association of Petroleum Geologists (AAPG)
Explorer Regions and Sections

Many geologists have earned their field trip stripes in the Guadalupe Mountains in West Texas, but fewer have heard – and braved the dangers – of hiking the mysterious and mineral-rich Franklin Mountains north of El Paso. The Franklin Mountain region is a west-tilting series of horst blocks that became 5,000-7,200-foot tall mountains as a result of the Laramide orogeny. The sheer eastern escarpment exposes rocks dating from the Pennsylvanian down to 1.25-billion-year-old basement granite. It was a “field trip through time” focused on the Cambrian, Ordovician, Silurian and Devonian formations, representing more than 100 million years of geologic history.

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American Association of Petroleum Geologists (AAPG)
Explorer Regions and Sections

The AAPG Southwest Section Convention explored a four-dimensional multiverse of geology and reservoirs, combining regional overviews with multi-scale measurements of rocks and sediments, and analyzing rocks in the fourth dimension of geologic time. The result is “Resology,” which general chair Ben Davis defines as “the study of geology and rock reservoirs at big and small scales.” He told conference attendees, “The goal of Resology is effective and efficient hydrocarbon production.”

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American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

The small town of Cunningham, Kansas lies about 65 miles straight west of Wichita on U.S. Highway 54. It was incorporated in 1887 as a commercial center for farmers and ranchers in that part of south-central Kansas. Hard winter wheat was the main cash crop, while herds of beef and dairy cattle were a close second source of income. This activity characterized the culture of Cunningham into the early years of the 20th century. That is, until a new industry was introduced to Kansas when, in 1915, oil was discovered in the El Dorado field northeast of Wichita.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

NASA’s Perseverance rover successfully landed on Mars on Feb. 18, 2021, which AAPG celebrated with a live watch party. Perseverance has since explored the Séítah region and is currently at the delta front of Jezero Crater on Mars using an enhanced autonomous navigation system and under guidance from NASA/JPL controllers. As of May 13, 2022, Sol 436, Perseverance has traveled 11.4 kilometers and drilled eight core samples. The rover has returned more than 249,000 raw images that are publicly available in the mission multimedia catalog.

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American Association of Petroleum Geologists (AAPG)
Explorer Director’s Corner

In February, TotalEnergies announced a significant light oil discovery in the Orange Basin, offshore Namibia. Reuters reported a source suggesting that the Venus-X1 well may have found more than 1 billion barrels of oil equivalent. This was the second significant discovery announced in the basin that month. The offshore continues to deliver new oil and natural gas discoveries worldwide. And as this issue hits your inbox, the offshore is the primary topic of discussion in Houston as the 2022 Offshore Technology Conference returns to NRG Park from May 2-5.

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American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

There are two main oil and gas producing sedimentary areas in France: the Paris Basin and the Aquitaine Basin. The presence of oil seeps and bitumen deposits has been known since ancient times in the western part of the Aquitaine basin, a 35,000-square-kilometer triangular polygon bordered to the north by the city of Bordeaux, to the east by Toulouse and to the south by the Pyrenees Mountain chain separating France from Spain. These hydrocarbon shows were observed close to surface anticlinal structures such as the Sainte-Suzanne dome, southwest of Pau or in the caprocks of salt diapirs at Salies de Bearn and Dax to the north.

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American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 2 October 2014, 2:00 p.m.–3:00 p.m.

This course is ideal for individuals involved in Midland Basin exploration and development. Successful development of Wolfcamp shale oil relies on complex inter-relationships (ultimately interdependencies) within and between a wide variety of scientific disciplines, financial entities, and company partnerships. 

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 13 December 2012, 12:00 a.m.–12:00 a.m.

The course will review core data, petrophysical comparisons, rock physics modeling (including pseudo logs and mechanical properties).

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 30 August 2012, 12:00 a.m.–12:00 a.m.

The entire Middle Pennsylvanian–to–top Precambrian basement (500 m) interval was cored in early 2011 in the BEREXCO Wellington KGS #1-32 well in Wellington Field, Sumner County, KS.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Thursday, 19 November 2020, 12:00 p.m.–1:00 p.m.

Another in a series of AAPG Visiting Geoscientist Presentations organized by the Manchester University AAPG Student Chapter. Sponsored by BP. Presented by Visiting Geoscientist Elda Miramontes, University of Bermen, Germany Webinar presented via Zoom on 19 November at 5:00pm (GMT-0)

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 9 December 2010, 12:00 a.m.–12:00 a.m.

The Mississippian-Devonian Bakken Petroleum System of the Williston Basin is characterized by low-porosity and permeability reservoirs, organic-rich source rocks, and regional hydrocarbon charge.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 10 November 2011, 12:00 a.m.–12:00 a.m.

This work investigates how heterogeneity can be defined and how we can quantify this term by describing a range of statistical heterogeneity (e.g. coefficient of variation and the Lorenz coefficient).

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Tuesday, 30 June 2020, 1:00 p.m.–2:00 p.m.

Visiting Geoscientist Juan Pablo Lovecchio reviews general aspects of rifting, rifts and passive margin formation and evolution through time, as well as elements of petroleum system development.

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, 10 May 2012, 12:00 a.m.–12:00 a.m.

Recognition and Correlation of the Eagle Ford, Austin Formations in South Texas can be enhanced with High Resolution Biostratigraphy, fossil abundance peaks and Maximum Flooding Surfaces correlated to Upper Cretaceous sequence stratigraphic cycle chart after Gradstein, 2010.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Tuesday, 9 September 2014, 2:00 p.m.–3:00 p.m.

Water cut is a big factor in gauging the success of horizontal drilling in the Mississippi Lime Play (MLP). The contributing factors are related in part to the spectrum of producing lithofacies and reservoir quality encountered that varies laterally and vertically, sometimes dramatically. 

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)
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)

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