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Sedimentology and Stratigraphy

Explorer President’s Column

It is sometimes said that every good idea and every innovation needs a good story. After 2020 we are now re-writing our individual and collective stories. Post COVID-19 reality has allowed AAPG members to reach beyond their normal geographical areas of influence. It is said that “necessity is the mother of all invention.” If that’s the case, then as a corollary I say that “failure is the father of most innovation.”

American Association of Petroleum Geologists (AAPG)
Asia Pacific Blog

This short-course covers a systematic step-by-step methodology for approaching carbonate reservoirs. It was initially developed for the engineering department at the Colorado School of Mines and has now become an annual tradition due to its popularity. You will get to see fantastic examples that have real-world sub-surface applications using data that is not available in the public domain.

American Association of Petroleum Geologists (AAPG)
Asia Pacific Blog

Stratigraphy remains an essential part of geoscience practices. It provides our conceptual framework for visualizing how layers are arranged and connected in the subsurface. Commonly stereotyped as a black box of names and descriptions of fossils, stratigraphy is in reality dynamic and, by integration with other techniques, can be highly predictive. This workshop aims to share, discuss and explore many of the new ideas regarding the stratigraphy of the hydrocarbon-bearing basins throughout Sundaland and provide a virtual platform for discussion and knowledge sharing, bringing workers and scholars on stratigraphy from different backgrounds together.

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

The overriding principle of AAPG’s special interest groups is to create an environment in which experienced professionals with like-minded views and concerns can come together to discuss, share, commiserate and become familiar with industry trends and Association events. Further, such groups create an environment in which individual members, including those in academia and service companies, as well as those in non-petroleum-based companies, both contribute to and benefit from programs and events of interest. The geoscience community in Kuala Lumpur, Malaysia was no stranger to the concept. For years, there was a SIG for young professionals, but the thinking was that there also needed to be something tailored for the experienced professional.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

The Perseverance rover touched down on Feb. 18 with live play-by-play straight from JPL Mission control. Within moments after touchdown, during celebration and high-fives, a picture emerged from the rover on the surface of Mars. The rover and landing system later returned spectacular images of the landing and the first 360-degree panorama of the landing zone. Already hundreds of images have been sent home. Most of these first images are from camera systems and subsystem checkouts.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

The AAPG EXPLORER has been following the progress of the Perseverance rover and the history of the search for life on Mars. Perseverance’s journey in space culminated in its safe landing in Jezero Crater near Mars’ equator on Feb. 18, 2021. Now, Perseverance begins its journey of geologic exploration, fieldwork and the search for signs of past Martian life. NASA and the Jet Propulsion Laboratory have deployed a series of successful and ever-more-sophisticated rovers. They have been deployed across the planet at carefully selected landing sites to explore for signs of Mars’ warmer and wetter past when it may have hosted the evolution of life.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

Last summer, nearly 30 geoscientists and engineers from the Canadian Society for Unconventional Resources trekked through an array of outcrops in the Sulphur Mountain Formation to piece together how the Montney Formation – Western Canada’s most prolific resource play – was formed. Rock by rock, they saw how the outcrops revealed a history of sedimental deposition, sedimentary structures, trace and body fossils, and even a bone bed. And, rather than getting there by airplane or car and hiking over tumultuous terrain, they navigated each nook and cranny from the comfort of their homes. For most CSUR members, it was their first virtual fieldtrip and will likely not be their last.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

University geoscience programs face a challenging future as the world emerges from the coronavirus pandemic – one that could have significant and even dire implications for oil and gas. Educators, mostly outside the United States, are already sounding an alarm.

American Association of Petroleum Geologists (AAPG)
Learn! Blog

Today we have a chance to explore outcrops in-depth with Jonathan Allen who shares his photos from Nova Scotia, Australia, the western U.S., and more.

American Association of Petroleum Geologists (AAPG)
Learn! Blog

A trip to Yellowstone as a child inspired Zane Jobe to become a geologist. Join Zane as he shares his story and his favorite outcrops.

American Association of Petroleum Geologists (AAPG)
Short Course
Virtual Short Course
Tuesday, 7 September Friday, 10 September 2021, 8:00 a.m.–12:00 p.m.

This course examines the evolution of concepts in deep water models, providing the participants with the knowledge and tools to describe and predict deep water reservoirs from exploration through production scales.

American Association of Petroleum Geologists (AAPG)
Workshop
Virtual Workshop
Tuesday, 5 October Wednesday, 6 October 2021, 9:00 a.m.–4:00 p.m.

Stratigraphy remains an essential part of geoscience practices. It provides our conceptual framework for visualizing how layers are arranged and connected in the subsurface. The workshop aims to share, discuss and explore many of the new ideas regarding the stratigraphy of the hydrocarbon-bearing basins throughout Sundaland.

American Association of Petroleum Geologists (AAPG)
Short Course
Virtual Short Course
Tuesday, 29 June Wednesday, 30 June 2021, 8:00 a.m.–12:00 p.m.

This course covers a unique step-by-step methodology that covers the most important factors to consider when tackling conventional or unconventional carbonate plays. After each step, participants will get to work on real subsurface data from basins across the globe. Consider this course as the “top 10 things an oil finder must know about carbonates.”

American Association of Petroleum Geologists (AAPG)
Field Seminar
Barcelona, Spain
Thursday, 9 September Friday, 10 September 2021, 8:00 a.m.–5:00 p.m.

Trip leader(s): Josep Anton Muñoz, Pablo Granado and Eduard Roca Limit: 20 Participants The aim of this 2-day field trip is the recognition of the key structural features of a fold and thrust belt detached on salt that has resulted from the inversion of a previous passive margin. To achieve this objective, some of the key and most spectacular localities of the southern Pyrenees have been selected along the ECORS-Pyrenees transect. This is a reference cross-section provided that for many years a huge amount of geological and geophysical data sets has been collected and integrating into a kinematic model of the South-Pyrenean fold and thrust belt. Subsurface data (well logs and seismic sections) will be combined with field observations. One of the main characteristics of the southern Pyrenees is the preservation of the synorogenic sediments since the earlier stages of deformation, which not only provide time constraints but also allow us discussion of kinematics of fault-related folds and thrust systems. Finally, the mild contractional deformation permits deciphering the initial geometry of the rift system and the salt structures that configure the structural grain of the passive margin before the inversion, allowing discussion of the role that these structures play during the fold and thrust belt development. Itinerary: (day by day details of the trip) Day 1 Stop 1.1: The South-Pyrenean thrust front. Sant Llorenç de Montgai Structure of a frontal thrust system and related unconformities. Out of sequence thrusts and synorogenic sediments. The frontal thrust system of the South-central Pyrenees has been detached into the Triassic evaporites and involves a thin Mesozoic succession. It is characterized by an emergent thrust system during the sedimentation of upper Eocene and lower Oligocene continental sediments. Frontal thrusts were progressively buried by conglomerates, triggering a break-back thrusting sequence and the development of out-of-sequence thrusts bringing together strongly different Mesozoic successions, such as the Montroig thrust in the picture. Stop 1.2: The Ager basin and the Montsec thrust sheet. Fontllonga The Ager basin in the footwall of the Montsec thrust. The Montsec thrust sheet developed from the Paleocene to the Early Eocene as recorded by continental to shallow marine sediments deposited in its footwall (Ager basin) as well as in the Tremp-Graus piggy-back basin. The lower Eocene sediments of these basins grade westward into the slope succession filling the Ainsa basin at the footwall of the Montsec thrust. Stop 1.3: The frontal structure of the Montsec thrust sheet. Ametlla (optional: Montrebei) Fault-propagation fold related with the inversion of Early Cretaceous extensional faults and growth deltaic sediments in the footwall syncline. The Montsec thrust sheet involves the northern part of the Upper Cretaceous foreland basin characterised by a strong subsident turbiditic trough at the footwall of the Bóixols thrust. These turbidites grade southward into a carbonatic platform that constitutes the backbone of the Montsec Range (main ridge and cliff of the pictures). Underneath the Upper Cretaceous carbonates, some Early Cretaceous extensional faults are preserved in the hanging wall of the Montsec thrust, but others have controlled the development of a hanging wall frontal anticline. The geometry of this anticline as well as the structure of the growth sediments in the footwall Ager syncline are visible in the field. The subthrust geometry will be discussed integrating surface observations and the available seismic and well data. Overnight in Tremp Day 2 Stop 2.1: The Sant Corneli-Bóixols anticline Inversion of the rift margin The Sant Corneli-Bóixols anticline is the most prominent frontal structure of the Bóixols thrust sheet in the central Pyrenees. This fold trends east–west and crops out for greater than 40 km along strike. The Sant Corneli-Bóixols anticline involves a thick Mesozoic succession detached on top of Triassic evaporites. The prefolding sequence consists of up to 5 km of prerift, synrift, and postrift carbonates ranging in age from Jurassic to Upper Cretaceous. Synfolding Upper Cretaceous sediments start with the upper Santonian carbonates and continue with a succession of Campanian and Maastrichtian marls and turbidites. The Sant Corneli–Bóixols anticline is an example of an inversion fold developed along the rift margin of the Lower Cretaceous basin. Its geometry is related with the inverted extensional system. In particular, the three-dimensional geometry, including the saddles between culminations, is inherited from the previous transfer faults of the segmented rift margin. Available seismic data and 3 exploratory wells constrain the geometry at depth. Stop 2.2: The synororgenic Paleogene conglomerates Inverted Lower Cretaceous basin and Eocene-Oligocene synorogenic conglomerates at Collegats gorge. Stop 2.3 (optional): The Sopeira and Aulet minibasins. Sopeira Minibasins developed by extensional collapse and salt evacuation during the thermal subsidence at the southern Pyrenean rift margin. Inversion of these mini-basins at the early stages of Pyrenean contractional deformation during Late Cretaceous. Additional logistic information Transportation Transportation will be with a small bus, assisted by minivans to have access to some of the outcrops. Physical demand, equipment and safety This is an easy field trip with very easy and limited hikes to get to the outcrops. Outcrops will be from main sealed roads. Safety vests will be available, to be used by everybody of the group wherever required and asked to. There will be First Aid Kits available in each car during fieldwork. Climate The climate during mid-end November in the fieldwork area can be cold and rainy, although dry and sunny days may occur as well. The temperature for November in Tremp can range between 30C and 170C. Participants should be prepared in case we should encounter bad weather and you should bring warm and waterproof clothes and suitable hiking boots. -->

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American Association of Petroleum Geologists (AAPG)
Workshop
Lisbon, Portugal
Wednesday, 18 May Thursday, 19 May 2022, 8:00 a.m.–5:00 p.m.

This 2-day conference brings together diverse experts working on modern and ancient turbidite, MTDs, contourite and hybrid/mixed systems in order to improve the present-day knowledge, models and predictive power.

American Association of Petroleum Geologists (AAPG)
Workshop
Salzburg, Austria
Tuesday, 19 October Wednesday, 20 October 2021, 8:00 a.m.–5:00 p.m.

Join us in Salzburg, the “castle of salt” and cradle of Mozart and Doppler, for a meeting aimed at bringing together different perspectives in the science of evaporite basins: from their formation to their deformation, from description and characterization to modelling. Exploratory success in evaporite-rich basins worldwide has depended on the role of evaporites as a deformable substrate, as a seal, or even as a good thermal conductor. The aim of this workshop is to improve our understanding and predictive ability by addressing evaporite systems in an integrated manner, all the way from precipitation to structuration, and exploring the multiple properties of evaporite sequences. The pre- and post-meeting field trips will also explore the salt mining heritage of the region, first exploited by the Celts 3500 years ago, and the salt-related structures of the Northern Calcareous Alps.

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American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Tuesday, 14 April 2020, 6:00 p.m.–8:00 p.m.

La Formación Smackover del Jurásico Superior (Oxfordiano) es una de las productoras de petróleo y gas más prolíficas de la llanura costera del noreste del Golfo de México, depositada en una rampa de carbonato proximal. Este estudio es una caracterización integral del ambiente de depositación de la Formación Smackover basada en datos sísmicos 3D y de pozos en los campos Vocation y Appleton situados en las subcuencas de Conecuh y Manila, en el suroeste de Alabama.

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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)
Online e-Symposium
Thursday, 7 June 2012, 12:00 a.m.–12:00 a.m.

Unger Field, discovered in1955, has produced 8.6 million barrels of oil from a thinly (several ft) bedded, locally cherty dolomite containing vuggy and intercrystalline porosity.

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)
Online e-Symposium
Thursday, 25 August 2011, 12:00 a.m.–12:00 a.m.

This e-symposium provides highlights of the hydraulic fracturing mechanics, analysis, and design, and is derived from a two and one-half (2-1/2) day course which is designed for drilling, completion, production engineers, engineering technicians, geologists, well-site and completion supervisors, and managers, who desire to possess a comprehensive and integral knowledge of Hydraulic Fracturing.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Tuesday, 9 June 2020, 4:00 p.m.–5:00 p.m.

Visiting Geoscientist Susan Morrice shares her personal experience and insight in this talk about opportunities for geoscientists. “Geoscientists have advantages ... They are Time Travellers and have open minds. Bringing this creativity and innovation to your company or starting your own! Challenging times bring silver linings!”

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)
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, 21 February 2013, 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)
Webinar
Virtual Webinar
Tuesday, 14 April 2020, 4:00 p.m.–6:00 p.m.

The Upper Jurassic (Oxfordian) Smackover Formation is one of the most prolific oil and gas producers in the northeastern Gulf of Mexico coastal plain, where it deposited in a proximal carbonate ramp. This study is a comprehensive characterization of the depositional environment of the Smackover based on 3D seismic and well data from wells in the Vocation and Appleton oil fields located in the Conecuh and Manila Sub-basins in southwest Alabama.

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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)
VG Abstract

The following short course option was developed for geology and geophysics students that have not had much exposure to how geoscience is applied in industry. It can be tailored for undergraduate juniors and seniors or graduate students. The agenda can be modified to meet specific needs and time constraints. Contact the presenter to discuss options.

Request a visit from Fred Schroeder!

American Association of Petroleum Geologists (AAPG)
VG Abstract

This lecture will discuss the differences between carbonates and siliciclastics from their chemical composition through their distributions in time and space. Building on these fundamental differences, we will explore the challenges carbonates pose to petroleum geologists in terms of seismic interpretation, reservoir quality prediction, field development, etc. Peppered with humorous personal stories, still raging academic debates, and the heartfelt frustrations of real industry professionals, the aim is to inspire students and young professionals to rise to the occasion and embrace the reservoir rocks that petroleum geologists love to hate.

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Request a visit from Noelle Joy Purcell!

American Association of Petroleum Geologists (AAPG)

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