HomeScience Discipline Sedimentology and Stratigraphy

Sedimentology and Stratigraphy

Explorer Geophysical Corner

Crossplotting is widely used in AVO analysis because it facilitates the simultaneous and meaningful evaluation of two attributes. Generally, common lithology units and fluid types cluster together in AVO crossplot space, allowing identification of background lithology trends and anomalous off-trend aggregations that could be associated with hydrocarbons. Interactive crossplots allow the interpreter to visualize the relationship between different well log properties or between different seismic attributes.

Show more
American Association of Petroleum Geologists (AAPG)
Explorer Article

The geoscience community at large now has access to a major trove of data gathered by ExxonMobil in the 1980s and ‘90s. ExxonMobil will share the results of its behind-the-outcrop coring program through a website created by the Society for Sedimentary Geology.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Shell has made a significant oil and gas discovery at the Graff-1 well offshore Namibia. The well results have so far shown at least two reservoirs in the Upper Cretaceous, with a light oil column reported in the Santonian, in high quality channel sands. This discovery is in the deep water of the southernmost sector of the Orange Basin offshore Namibia.

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Asia’s increased appetite for natural gas ranks as one of the most important global energy stories of the past 10 years, and one of the most often overlooked. It appears likely to drive Asian exploration and energy trading for the near future.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Adventure enthusiasts should enjoy the story of Angelo Pitoni, a larger- than-life geologist whose story includes exploits rivaling any of those portrayed on the big screen. This article focuses specifically on a chapter of his life that took place in my country, Venezuela, and forms part of our country’s oil exploration history.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

Phase decomposition is a novel technique that decomposes a composite seismic signal into different phase components, which can improve reservoir characterization. The technique is particularly useful in those areas where thin-bed interference causes the phase of the input seismic response to differ from the phase of the embedded wavelet in the data.

American Association of Petroleum Geologists (AAPG)
Explorer Article

When the International Petroleum Technology Conference comes to Saudi Arabia in February, the technical program will include a significant look at both unconventional oil and gas and conventional tight oil in the Middle East. Those are two different concepts in the region and the distinctions are important. The Middle East holds a large conventional tight oil resource, now emerging as a serious focus for development. With so much recent attention devoted to unconventional resources, conventional tight oil could be considered an overlooked sibling.

Show more
American Association of Petroleum Geologists (AAPG)
Explorer Article

Thanks to continuing advances in reservoir characterization, technology and innovative thinking, many oil fields around the globe have “grown larger” in recent decades. John Sneider, president of Sneider Exploration Inc., documented examples of mature field growth 20 years ago and recently revisited the topic to focus on mature giant fields. This updated analysis is detailed in chapter 4 of the new AAPG Memoir 125: “Giant Fields of the Decade: 2010 – 2020.”

Show more
American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

The estimated hydrocarbon reserves around the world, when produced, can keep us going for the next several decades. But scientific records and our own experiences are enough evidence that climate change is indeed happening. Addressing it requires energy extraction from non-fossil fuels. One such resource is the natural heat of the Earth, or geothermal energy.

American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

Before unconventional resources became prevalent in the global petroleum supply, deepwater exploration and development was a significant focus for many larger companies. For deepwater activities to succeed, the petroleum industry was forced to merge its above-ground concerns with the below-ground geoscience and engineering disciplines.

American Association of Petroleum Geologists (AAPG)
Short Course
Tunis, Tunisia
Monday, 12 September 2022, 8:00 a.m.–4:30 p.m.

This short course will comprise lectures, short exercises and discussion sessions. The course will focus on a number of case studies that link outcrop and subsurface geology and have relevance to petroleum exploration and production. Case studies range from Silurian to Miocene in age and come from North African and Mediterranean Basins. The course builds on basic knowledge of sedimentary geology but does not require specialist skills from participants.

Show more
American Association of Petroleum Geologists (AAPG)
Workshop
Lisbon, Portugal
Thursday, 18 May Friday, 19 May 2023, 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)
Webinar
Virtual Webinar
Monday, 19 October 2020, 12:00 p.m.–1:30 p.m.

In this webinar, Stephen Ehrenberg will present a review of the various processes that interact to determine the wide variations in porosity found in carbonate strata containing petroleum reserves. Presentation is via Zoom on Monday 19 October at 12:00 London time.

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
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)
Webinar
Virtual Webinar
Tuesday, 2 June 2020, 6:00 p.m.–7:00 p.m.

Visiting Geoscientist Xavier Moonan provides an overview of the destruction in the Los Iros area following the 6.9 magnitude earthquake that hit Trinidad and Tobago in 2018. His talk focuses on understanding the results from various post-earthquake studies conducted on the Los Iros, reviewing the theories developed to explain the origin and integrating datasets to provide an understanding of what transpired.

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)
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, 14 July 2020, 11:00 a.m.–12:00 p.m.

The Santos Basin is an excellent example of how much oil is kept in remote sites, just waiting to be found by bold explorationists with the will and resources needed to find them. Join Flávio Feijó to for a presentation of the history and potential for future discoveries in the Santos Basin Webinar will be presented via Zoom on Tuesday 14 July 2020 at 11am CDT (UMT-6). Register Now at Zoom

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 24 October 2013, 12:00 a.m.–12:00 a.m.

This e-symposium will be introducing signal processing techniques as a means to maximize extracting geomechanical data from petrophysical logs.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Thursday, 2 July 2020, 4:00 p.m.–5:00 p.m.

Presented by Kevin C. Hill, Associate Professor, University of Melbourne Gravity modelling of Australia's southern margin reveals that the initial rift with Antarctica was beneath the current Ceduna Delta. A regional, high-quality seismic traverse from the coast to oceanic crust across the Bight Basin has been assembled and interpreted in detail, then balanced, restored, decompacted, and replaced at paleo-water depths. The Late Cretaceous Ceduna Delta developed above a Late Jurassic-Early Cretaceous rift basin in three stages punctuated by significant pulses of uplift and erosion across areas >100 km wide and with up to 1 km of erosion. The Cenomanian White Pointer delta prograded into deepening water and hence underwent gravitational collapse. This was terminated in the Santonian when the Antarctic margin was pulled out from below, thus supplying heat to a remnant thicker outer margin crust, causing doming and erosion. Importantly, this established the saucer-shaped geometry of the Ceduna Delta that persisted throughout its development, so that any hydrocarbons generated in the southern half of the basin would have migrated towards this outer margin high. The Tiger Formation was deposited in shallow water in a full rift basin prior to breakup, which was followed by regional thermal subsidence. The Hammerhead delta developed on the newly formed passive margin but was terminated by another pulse of uplift and erosion, perhaps associated with a change in plate motion at the end of the Cretaceous. The finite element modelling of this proposed tectonic evolution will test its validity and predict hydrocarbon generation and migration through time.

Show more
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.

Show more
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.

Show more

Request a visit from Keith Gerdes!

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.

Show more

Request a visit from Noelle Joy Purcell!

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)

Related Interests

See Also ...