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Scientific drill cores from Lake Malawi provide the first continuous and high-resolution 1.2 million-year terrestrial record of past climates in East Africa. The multi-proxy climate signals extracted from these lake sediments reveal remarkable high-frequency and high-amplitude variability in effective moisture over this major southern hemisphere catchment. The level of Lake Malawi dropped more than 400 m at least 25 times over the past 1.2 million years, substantially impacting endemic organisms in the lake, and implying significant landscape variability over this time interval. This presentation provides an overview of the Lake Malawi Scientific Drilling Project, including basin framework seismic images from this enormous ultra-deep rift lake. This work and subsequent East Africa drilling studies are providing the environmental context for the origin of our own species.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-christopher-scholz-mountains-monsoons-and-migrations-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Mountains, Monsoons and Migrations: Rift Tectonics, Tropical Climates and the Origin of Humans
 

Continental rifts have long been important for hosting lacustrine source rocks in many hydrocarbon provinces, and in recent years rifts have seen accelerated exploration for syn-rift reservoirs. The application of sequence stratigraphy to rift-lake systems requires special consideration, in light of 1) heightened and spatially variable subsidence accompanying normal faulting; and 2) sensitive lake levels driven by climatic shifts over geological time scales. This presentation provides examples of sequence stratigraphy applied to rift-lake systems, especially considering the roles of rift segmentation, magmatism (or lack thereof), and varying continental hydroclimates. The wide geochemical variability of lake systems in rifts is in part driven by the different styles of magmatism observed in different extensional environments, which influences the occurrences of lacustrine carbonates. Predictive models of siliciclastic reservoir facies in extensional basins are grounded in our understanding of structural controls of drainage systems. Stacking patterns and lithofacies variability are commonly complicated by climatic processes. Many tropical lakes are hypersensitive to changing evaporation-precipitation ratios, and therefore lake level changes are amplified through subtle changes in climate. Accordingly, lake level shifts in many tropical basins are dramatic, with documented changes of hundreds of meters over timeframes of a few thousand years. This presentation includes extensive overviews of nested seismic reflection data sets, ranging in scope from high-resolution data to basin- and crustal-scale imagery.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-christopher-scholz-magmatic-versus-amagmatic-continental-extension-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Magmatic Versus Amagmatic Continental Extension, and the Sedimentary Sequence Architecture of Rifts
 

Exploration activity in lacustrine basins in extensional settings has accelerated in recent years with important discoveries in the South Atlantic Ocean and in East Africa. This presentation reviews reservoir facies in lacustrine-rifts including siliciclastic deposits, mixed siliciclastic-carbonate systems, as well as lacustrine carbonates, as observed in different systems in East Africa. Lacustrine extensional basins are characteristically dominated by siliciclastic deposits, on account of the high-relief on faulted rift margins, and associated deep-basin subsidence. Source rock facies in lake systems are shown to vary dramatically in space and time, based on studies of modern lake basins as well as ancient high-resolution records revealed through scientific drilling. This presentation offers data-intensive perspectives of extant lake basins in both the western and eastern branches of Africa's Great Rift Valley.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/dl-christopher-scholz-hydrocarbon-systems-in-extensional-settings-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Hydrocarbon Systems in Extensional Settings: Insights from Scientific Drilling in East Africa
 
The Ice Age and the Giant Bakken Oil Accumulation

The USGS estimated (2013) that the Late Devonian to Early Mississippian Bakken Formation holds in excess of 7 billion barrels (~1.1 billion m3) of recoverable oil, making it one of the top 50 largest oilfields in the world. Most of the production comes from shallow-marine sandstones of the Middle Bakken Member that are directly over- and underlain by extremely organic-rich shale source rocks (Upper and Lower Bakken Shale members respectively). Although not oil-productive everywhere, the Middle Bakken forms a relatively sheet-like unit that covers an area of over 200,000 square miles (~520,000 km2) of the intracratonic Williston Basin.

The vertical juxtaposition of shallow-marine reservoir and more distal source rocks over such a large area, without intervening transitional facies, is unusual from a stratigraphic perspective. One possible explanation would require global fluctuations of sea level to drive geologically rapid and extensive shoreline movements in this relatively stable basin. Forced regression associated with falling sea level could explain the lack of transitional facies (e.g., inner shelf) between the distal Lower Bakken Shale and the overlying Middle Bakken (a sharp-based shoreface). Subsequent sea-level rise would have caused rapid and extensive transgression, leading to the observed stratigraphic relationships between the Middle and Upper Bakken members. But what could have caused the changes in sea level?

A considerable body of evidence points to a Late Devonian-Early Mississippian ice age that covered portions of Gondwana (e.g., parts of present-day Brazil) that were situated close to the paleo South Pole. This ice age consisted of more than one glacial/interglacial cycle and was probably triggered by massive removal of CO2 from the atmosphere by land plants and organic-rich shales. Some evidence indicates that at least 100 m of sea-level drop took place during one of the Famennian glaciations, which would have effectively drained the Williston Basin and induced major shoreline progradation. Melting of the ice sheets would have caused transgression and reflooding of the basin and deposition of the Upper Bakken Shale. Other basins around the world record similar evidence for glacioeustacy near the Devonian-Mississippian transition. The glacial/interglacial cycles are expressed differently from basin to basin, reflecting the interplay between fluctuations of global sea level and each basin’s history of subsidence and sediment supply.

Show more American Association of Petroleum Geologists (AAPG)
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Lucia Torrado, had been here before – the AAPG Student Poster Competition, held yearly at the AAPG Annual Convention and Exhibition. But this year had a “vibe” to it.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/uh-student-wins-poster-competition-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true UH Student Wins Poster Competition
 

The present day Cretaceous Codell oil and gas development in the central portion of the Denver Basin of Colorado can be attributed to an earlier effort in bringing the Codell to the attention of the industry.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/raymonds-folly-the-codell-play-of-the-denver-basin-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Raymond's Folly: The Codell Play of the Denver Basin
 

Offshore opportunities from Aruba to the Falkand Islands have national and independent companies keeping their eye on Latin America.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/offshore-exploration-a-bright-spot-for-latin-america-e-and-p-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Offshore Exploration a Bright Spot for Latin America E&P
 

The AAPG Annual Convention and Exhibition will feature a variety of field trips that will bookend the meeting, spanning from March 26 to April 8.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/field-trips-set-for-ace-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Field Trips Set for ACE
 

Last year, the extraordinarily high quality of the technical program was the talk of the AAPG Annual Convention and Exhibition in Calgary, and this was at an ACE with plenty of high points to talk about. The technical program for the 2017 ACE in Houston promises to be even better than last year’s.

American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/explorer-cover-2017-03mar.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Centennial ACE Boasts Record Abstract Submissions
 

The driving forces for conventional accumulations (structural or stratigraphic traps) are Forces of Buoyancy which are due to differences in densities of hydrocarbons and water. In contrast, the driving forces for unconventional tight accumulations are Forces of Expulsion which are produced by high pressures. That is an enormous difference and creates unconventional petroleum systems that are characterized by very different and distinctive characteristics. The Force of Expulsion pressures are created by the significant increase in volume when any of the three main kerogen types are converted to hydrocarbons. At those conversion times in the burial history, the rocks are already sufficiently tight so the large volumes of generated hydrocarbons cannot efficiently escape through the existing tight pore system, thus creating a permeability bottleneck that produces an overpressured compartment over a large area corresponding to the proper thermal oil and gas maturities for that basin. The forces initially created in these source rocks can only go limited distances into adjacent tight reservoirs (clastics or carbonates) above or below the source. The exact distance will vary depending on the pressure increase, matrix permeability, and fractures of that specific tight reservoir system. In general, the distances are small, in the orders of 10s to 100s of feet for oil and larger for more mobile gas systems. Those exact distance numbers are subject to ongoing investigations.  

A plot of the pressure data versus elevation for a given formation is critical in determining whether an accumulation is conventional or unconventional. Conventional accumulations will have hydrocarbon columns of 10s to 100s of feet with the pressure in the hydrocarbons and that in the water equal at the bottom of the accumulation (at the HC-water contact). In contrast, the unconventional accumulations will show HC column heights of 1000s of feet with the pressure in the hydrocarbon phase and the water phase being the same at the top of the accumulation (at the updip transition zone). Those significant differences are critical for understanding and differentiating these two play types. Because the system is a pore throat bottleneck with very little or minimum lateral migration, the type of hydrocarbon s are closely tied to the thermal maturity required to generate those hydrocarbons. Thus the play concept begins with two important geochemical considerations: (1) where are the source rocks and what are the kerogen types and organic richness (TOC), and (2 ) where are they mature in the basin for oil, condensate, and gas in the basin. These parameters will very quickly define the fairway for the play. Then one has to add the critical information on the reservoirs themselves: composition (brittleness), thickness, and reservoir quality (matrix porosity and permeability). In summary, these tight unconventional petroleum systems (1) are dynamic , and (2) create a regionally inverted petroleum system with water over oil over condensate over gas for source rocks wit h Type I or II kerogen types.

Show more American Association of Petroleum Geologists (AAPG)
Desktop /Portals/0/PackFlashItemImages/WebReady/sd-Our-Current-Working-Model-for-Unconventional-Tight-Petroleum-Systems-Oil-and-Gas-hero.jpg?width=100&h=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Our Current Working Model for Unconventional Tight Petroleum Systems: Oil and Gas
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In-Person Training
Arlington Texas United States 09 January, 2020 09 January, 2020 54179 Desktop /Portals/0/PackFlashItemImages/WebReady/SWS-Bill-Memorial-ShortCourse.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Basin Modeling and Geochemistry, Sedimentology and Stratigraphy, Engineering, Petrophysics and Well Logs, Clastics, Carbonates, Reservoir Engineering, Eolian Sandstones, Fluvial Deltaic Systems, Marine, Deepwater Turbidites
 
Arlington, Texas, United States
9 January 2020

The AAPG Southwest Section presents the 2020 Bill Hailey Memorial Short Course in Arlington, Texas. Dr. Lesli J. Wood will be speaking on "Subaqueous mass failures: Processes, Deposits and Implications of their occurrence in exploration and production of energy resources".

 

Abilene Texas United States 10 January, 2020 10 January, 2020 54178 Desktop /Portals/0/PackFlashItemImages/WebReady/SWS-Bill-Memorial-ShortCourse.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Basin Modeling and Geochemistry, Sedimentology and Stratigraphy, Engineering, Petrophysics and Well Logs, Clastics, Carbonates, Reservoir Engineering, Eolian Sandstones, Fluvial Deltaic Systems, Marine, Deepwater Turbidites
 
Abilene, Texas, United States
10 January 2020

The AAPG Southwest Section presents the 2020 Bill Hailey Memorial Short Course in Abilene, Texas. Dr. Lesli J. Wood will be speaking on "Subaqueous mass failures: Processes, Deposits and Implications of their occurrence in exploration and production of energy resources".

 

Barranquilla Atlántico Colombia 26 March, 2020 27 March, 2020 54605 Desktop /Portals/0/PackFlashItemImages/WebReady/gtw-lacr-exploration-development-in-southern-caribbean-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true Business and Economics, Risk Analysis, Basin Modeling and Geochemistry, Basin Modeling, Maturation, Migration, Oil and Gas Analysis, Oil Seeps, Petroleum Systems, Source Rock, Thermal History, Geophysics, Seismic, Magnetic, Gravity, Direct Hydrocarbon Indicators, Petrophysics and Well Logs, Clastics, Sedimentology and Stratigraphy, Conventional Sandstones, Deep Sea / Deepwater, Deepwater Turbidites, Eolian Sandstones, Fluvial Deltaic Systems, High Stand Deposits, Incised Valley Deposits, Marine, Regressive Deposits, Sheet Sand Deposits, Shelf Sand Deposits, Slope, Transgressive Deposits, Sequence Stratigraphy, Structure, Structural Analysis (Other), Tectonics (General), Geomechanics and Fracture Analysis, Fold and Thrust Belts, Compressional Systems, Structural Traps, Deep Basin Gas, Tight Gas Sands, Stratigraphic Traps, Member
 
Barranquilla, Atlántico, Colombia
26-27 March 2020

The AAPG Latin America & Caribbean Region and the Colombian Association of Petroleum Geologists and Geophysicists (ACGGP) invite you join us for GTW Colombia 2020, a specialized workshop bringing leading scientists and industry practitioners to share best practices, exchange ideas and explore opportunities for future collaboration.

The 2-day workshop brings together technical experts and industry leaders from Colombia and throughout the Americas to take a multidisciplinary look at future opportunities for exploration and development of Southern Caribbean Frontier Basins.

Online Training
13 December, 2012 13 December, 2012 1494 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-petrophysics-of-shales.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
13 December 2012

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

01 January, 2013 01 January, 2013 1459 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-cc-giant-oil-and-gas-fields.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
1 January 2013

There are more approximately 1,000 oil and gas fields in the world that have been classified as "giant," containing more than 500 million barrels of recoverable oil and /or 3 trillion cubic feet of gas.

07 November, 2013 07 November, 2013 1500 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-from-qualitative-to-quantitative-interpretations.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
7 November 2013

This e-symposium presentation places the interpretation of deep-water turbidites discernible in 3-D seismic inversion data within a geological context.

08 December, 2011 08 December, 2011 1480 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-connectivity-in-fluvial-systems.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
8 December 2011

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

24 October, 2013 24 October, 2013 1499 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-geomechanical-data-from-petrophysical-logs.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
24 October 2013

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

28 April, 2011 28 April, 2011 1471 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-niobrara-petroleum-system-a-major-tight-resource-play.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
28 April 2011

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

17 February, 2011 17 February, 2011 1469 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-siliclastic-sequence-stratigraphy.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
17 February 2011

This presentation is designed for exploration/production geologists and geological managers or reservoir engineers.

11 November, 2010 11 November, 2010 1465 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-geochemical-evaluation-of-eagle-ford-group-source.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
11 November 2010

This e-symposium is ideal for geologists, geophysicists, engineers and other geoscientists who are involved in gas shale exploration and production.

29 April, 2010 29 April, 2010 1457 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-seismic-stratigraphy-seismic-geomorphology-of-deep-water.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
29 April 2010

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

22 October, 2009 22 October, 2009 1452 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-fluvial-stratigraphy.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
22 October 2009

This course can help you gain the ability to describe the complex and highly variable reservoirs, which are typified by complex internal heterogeneity.

14 February, 3000 14 February, 3000 7817 Desktop /Portals/0/PackFlashItemImages/WebReady/oc-es-generic-hero.jpg?width=100&height=100&mode=crop&anchor=middlecenter&quality=75amp;encoder=freeimage&progressive=true
 
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