Explorer Article

It’s been two years since NASA’s Perseverance rover successfully landed on Mars, where its exploration of Jezero Crater continues. Perseverance rover’s primary surface mission was designed to last one Mars year, or 687 Earth days, beginning with its Feb. 18, 2021 landing. It reached that milestone on Jan. 6. As of Jan. 7, the rover has entered its extended mission phase.

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)
Explorer Geophysical Corner

Phase decomposition is an interesting technique that can decompose a composite seismic signal into different phase components, and which in turn can help with the characterization of thin target sandstone or carbonate reservoirs. Here we discuss the application of phase decomposition as a reservoir management tool, with the odd phase component (sum of plus 90 degrees and minus 90 degrees phase components) showing better correlation with the wells that control the injection and withdrawal of a natural gas storage reservoir in Denmark.

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American Association of Petroleum Geologists (AAPG)
Learn! Blog

Welcome to a new series in the AAPG Learn! Blog entitled “My Favorite Outcrop.” In this series, we chat with geoscientists who tell us about their favorite outcrops encountered during their work in the field. Today we meet with Clara Abu, who is one of the founding members of the Salt Basins Technical Interest Group. One of her favorite outcrops was in Tusher Canyon, Utah, featured in the photo.

American Association of Petroleum Geologists (AAPG)
Learn! Blog

Understanding the role and influence of salt in the subsurface has been the key to many hydrocarbon discoveries and appraisals and more recently carbon & hydrogen capture and storage, and geothermal interests. Now, AAPG has a new Technical Interest Group, co-founded and co-chaired by Clara Abu (Ph.D Candidate Imperial College), Rachelle Kernen Ph.D., Leonardo Muniz Pichel Ph.D., Clara Rodriguez Ph.D., and Tim Shin, MSc. Welcome to an interview with one of the co-founders, Clara Abu.

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American Association of Petroleum Geologists (AAPG)
Learn! Blog

Understanding the role and influence of salt in the subsurface has been the key to many hydrocarbon discoveries and appraisals and more recently carbon & hydrogen capture and storage, and geothermal interests. Now, AAPG has a new Technical Interest Group, co-founded and co-chaired by Clara Abu (Ph.D Candidate Imperial College), Rachelle Kernen Ph.D., Leonardo Muniz Pichel Ph.D., Clara Rodriguez Ph.D., and Tim Shin, MSc. Welcome to an interview with Tim Shin, one of the co-founders.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

Josh Rosenfeld highlighted some perspectives on the Paleogene drawdown hypothesis in the Gulf of Mexico in the April 2020 issue of the EXPLORER, a result of suspected isolation from the world ocean during the Cuban arc-Bahamas collision with implications for Wilcox reservoir deposition. In contrast, John Snedden and authors’ portrayed the Wilcox as a period of normal marine deposition, requiring no such drawdown, in the May 2020 issue. Still another concept was presented by Roger Higgs at the South African 2009 AAPG International Conference and Exhibition, that marine isolation occurred but that fluvial input exceeded evaporation such that the Gulf became brackish, hence the poor development of Wilcox fauna.

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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)
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

Congratulations to Paul Weimer, Martha Lou Broussard, Fred Schroeder, Margot and Ned Timbel and the many other AAPG Award Winners who will be recognized at the 2020 AAPG Annual Convention and Exhibition in Houston, June 7-10. Paul Weimer is the recipient of the Association’s highest honor, the AAPG Sidney Powers Memorial Award. Martha Lou Broussard joins him at the top of the awardees list as this year’s Michel T. Halbouty Outstanding Leadership Award recipient.

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American Association of Petroleum Geologists (AAPG)
Field Seminar
Palermo, Italy
Thursday, 25 April 2024, 8:00 a.m.–5:00 p.m.

Time: TBC Attendee Limit: Minimum 15 - Maximum 50 People Fee: TBC Registration Deadline: TBC Field Trip Rendezvous Point Hotel nH Palermo This one-day field trip will provide an introduction to a Miocene-Pliocene succession of southern Sicily, which includes outcrops of the Messinian Salinity Crisis (MSC), as well as the Messinian-Zanclean GSSP (Global Boundary Stratotype Sections and Point) and Zanclean stratotype. The MSC sedimentary record consists of an evaporitic-carbonate unit at the base (the Basal Limestone), overlain the Lower Gypsum unit, in turn overlain by the Upper Gypsum unit, and sealed by transgressive chalk deposits of the Trubi Fm. The Lower Gypsum unit (massive gypsum with cm-sized selenite crystals) will be visited along the beach of Siculiana Marina (about 15 km NW of Agrigento). Next, we will visit near Capo Rossello (about 10 km NW of Agrigento) an outcrop of the Upper Gypsum unit consisting of clay-gypsum cycles and overlain by the Trubi Fm. The latter, at Scala dei Turchi beach, consists of chalk deposits arranged in a spectacular thick succession (~120 m thick) interpreted as astronomically-controlled depositional cycles. The uppermost interval of the MSC sedimentary record, including the Messinian-Zanclean GSSP, will be observed along the beach of Eraclea Minoa located about 20 km NW of Capo Rossello. Field Trip Leaders Antonio Caruso University of Palermo Attilio Sulli University of Palermo

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American Association of Petroleum Geologists (AAPG)
Field Seminar
Palermo, Italy
Sunday, 21 April 2024, 8:00 a.m.–5:00 p.m.

Time: TBC Attendee Limit: Minimum 15 - Maximum 45 People Fee: TBC Registration Deadline: TBC This one-day field trip will focus on Mesozoic (Jurassic to Cretaceous) carbonates outcropping in the fold and thrust belt of western Sicily and equivalent to the aquifer complex of the Sciacca Geothermal Field located in the southwestern part of the island. Participants will have the opportunity to visit in the first stop a spectacular “drowned” carbonate-platform succession at Mt. Maranfusa located in an inactive quarry about 50 km SW of Palermo. The succession consists of Lower Jurassic peritidal cycles overlain by Middle Jurassic to Cretaceous pelagic limestone (e.g. ammonitic limestone, “chalk”) and marked by an unconformity with locally hardground. Syn-depositional Mesozoic tectonic is characterized by neptunian dykes and normal faults, whereas reverse faults, strike-slip faults, and joints are related to subsequent Cenozoic deformation. In the second stop, at Mt. San Calogero, adjacent to the picturesque coastal town of Sciacca (about 100 km south of Palermo), we will visit the surface expression of an extensive karst system linked to uprising geothermal fluids. Furthermore, we will discuss main characteristics of the Sciacca Geothermal Field and its connection to deep mantle-derived fluids. Outcrop data will be integrated with both 2D seismic lines and exploration well logs showing the stratigraphy and structure of the deep aquifer. Another topic, given the presence of faults and joints in the outcrops, this field trip can provide the participants with valuable insights into naturally fractured reservoirs at the sub-seismic scale. Field Trip Leaders Gianni Mallarino MOL Group Attilio Sulli University of Palermo

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American Association of Petroleum Geologists (AAPG)
Field Seminar
Banff, Canada
Saturday, 11 May 2024, 8:00 a.m.–3:00 p.m.

Time: 8:00am - 5:00pm Fee: $300 AAPG members $350 Nonmembers $200 Academic/AAPG Emeritus Members $50 discount for workshop registrants Fee Includes: Transportation Insurance Field guide Entrance fee to Banff National Park Registration available during workshop registration This field trip will focus on the structural geology of the foothills and Front Ranges of Banff. Participants will be able to view excellent field examples of structures very similar to the producing oil and gas fields in the foothills to the west of Calgary and to learn about the complexities of sub-seismic-scale deformation. The field trip starts with an introduction to the interaction between thrust front with foreland basins and the interaction of basement trends with thrust belt geometries and (conventional) hydrocarbon fields. During the 1-day trip participants will follow a dip transect from the undeformed foreland basin, the eastern edge of the foothills marked by the triangle zone, the Front Ranges boundary and end at the Main Ranges west of Banff. Field Trip Itinerary Depart from Calgary – 8:00 a.m. Stop 1: Cochrane Retreat Road Overlook Trip overview and introduction; safety and logistics comments; interaction of thrust front with foreland basin; interaction of basement trends with thrust belt geometry and (conventional) hydrocarbon field distribution; appreciation of scale for subsurface play fairway. Stop 2: Scott Lake Stop 3: The Stony Nakoda Tim’s Classic stop, with historical importance for understanding the thrust belt and thrust geometry. Part 1 of displacement gradient on a large thrust. Most importantly, toilet stop after all the Tim’s coffee and driving. Review of Mt Yamnuska from a different perspective; preview of drive through McConnell damage zone and change in HW stratigraphy.. Stop 4: Lac des Arcs Imbricate thrust sheets in the Front Ranges and Banff Formation. Stop 5: Canmore T-junction Observe complexities of sub-seismic-scale deformation in mechanically layered rocks in the footwall of a large thrust Stop 6: Canmore strike view of the Rundle thrust Exposed strike view analogous to a cut-away of a giant conventional Foothills hydrocarbon field such as Turner Valley. Cross faults within the thrust sheet offset potential reservoir units at sub-seismic scale. Cross faults are arguably part of a regional trend associated with deeper, basement-rooted NE-SW structures. Stop 7: Mt Norquay Overlook Stop 8: Bow Falls Fracture systems in the Vega Siltstone Mbr of the Triassic Sulphur Mtn Fm. This outcrop of Vega Member siltstone of the Sulphur Mtn Fm is considered equivalent to upper Montney Fm. We will focus on the outcrop adjacent to the steps up to the Falls overlook.

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American Association of Petroleum Geologists (AAPG)
Workshop
Palermo, Italy
Monday, 22 April Wednesday, 24 April 2024, 8:00 a.m.–5:00 p.m.

This Symposium marks a collaborative event that brings together AAPG Europe and AAPG Middle East, with a central focus on carbonates and mixed carbonate systems worldwide, while highlighting their significance within these two regions. The primary objectives are an overview of controls that govern the evolution of these systems in time and space and the characterization and prediction of their properties across scales.

American Association of Petroleum Geologists (AAPG)
Workshop
Khobar, Saudi Arabia
Tuesday, 5 March Thursday, 7 March 2024, 8:00 a.m.–5:00 p.m.

Join us for the 4th Edition of: "Stratigraphic Traps of the Middle East" workshop. The workshop will be hosted by AAPG in Al Khobar, Saudi Arabia 5-7 March 2024.

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 Certificate Course
Tuesday, 1 January 2013, 12:00 a.m.–1:00 a.m.

There are 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.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Thursday, 3 December 2020, 11:00 a.m.–12:00 p.m.

Patawarta Diapir, approximately 2-6km2 located in the Central Flinders Ranges, South Australia, has been interpreted as a single allochthonous salt sheet containing Tonian-aged igneous and layered evaporite sedimentary intrasalt inclusions derived from the Callanna Group. In this webinar, Rachelle Kernen describes the diapir as five primarily silty limestone inclusions (0.5-2km2), re-interpreted as Ediacaran-aged Wonoka Formation and Patsy Hill member of the Bonney Sandstone (Wilpena Group). Webinar presented Thursday 3 December 2020 at 11:00 SGT (GMT+8) Singapore time

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American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Thursday, 4 June 2020, 3:00 p.m.–4:00 p.m.

Salt welds form due to salt thinning by mechanical (e.g., salt-flow) and/or chemical (e.g., salt-dissolution) processes. This webinar explores how we use 3-D seismic reflection, borehole, and biostratigraphic data to constrain the thickness and composition of salt welds, and to test the predictions of analytical models for salt welding.

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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