Oil Jumps 1%, on Course for Weekly Gain - 14 February, 2020 10:49 AM
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The Coronavirus May Mark The End Of Russia-OPEC Cooperation - 14 February, 2020 10:21 AM
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Keeping Up With LNG Carrier Technology - 14 February, 2020 10:00 AM
Exploration & Development in Southern Caribbean Frontier Basins - Early Bird Fee
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Deepwater and LNG GTW - Call for Poster Abstracts
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Evaporite Processes and Systems: Integrating Perspectives - Call for Abstracts
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Energized by the recent Statoil ASA-operated Bay du Nord light oil discovery in Newfoundland’s offshore Flemish Pass Basin, earth scientists are gearing up to host the fourth Atlantic Realm Conjugate Margins Conference in St. John’s, Newfoundland, Aug. 20-22.
Umiat field in northern Alaska is a shallow, light-oil accumulation with an estimated original oil in place of more than 1.5 billion bbl and 99 bcf associated gas. The field, discovered in 1946, was never considered viable because it is shallow, in permafrost, and far from any infrastructure. Modern drilling and production techniques now make Umiat a more attractive target if the behavior of a rock, ice, and light oil system at low pressure can be understood and simulated.
The Umiat reservoir consists of shoreface and deltaic sandstones of the Cretaceous Nanushuk Formation deformed by a thrust-related anticline. Depositional environment imparts a strong vertical and horizontal permeability anisotropy to the reservoir that may be further complicated by diagenesis and open natural fractures.
Experimental and theoretical studies indicate that there is a significant reduction in the relative permeability of oil in the presence of ice, with a maximum reduction when connate water is fresh and less reduction when water is saline. A representative Umiat oil sample was reconstituted by comparing the composition of a severely weathered Umiat fluid to a theoretical Umiat fluid composition derived using the Pedersen method. This sample was then used to determine fluid properties at reservoir conditions such as bubble point pressure, viscosity, and density.
These geologic and engineering data were integrated into a simulation model that indicate recoveries of 12%–15% can be achieved over a 50-yr production period using cold gas injection from five well pads with a wagon-wheel configuration of multilateral wells.
Interpretation of seismic data from the Sorvestsnaget Basin, southwest Barents Sea, demonstrates gradual middle Eocene basin infilling (from the north) generated by southward-prograding shelf-margin clinoforms. The basin experienced continued accommodation development during the middle Eocene because of differential subsidence caused by the onset of early Eocene sea-floor spreading in the Norwegian-Greenland Sea, faulting, salt movement, and different tectonic activity between the Sorvestsnaget Basin and Veslemoy high. During this time, the margin shows transformation from an initially high-relief margin to a progradation in the final stage. The early stage of progradation is characterized by the establishment of generally oblique clinoform shifts creating a flat shelf-edge trajectory that implies a gentle falling or stable relative sea level and low accommodation-to-sediment supply ratio (1) in the topsets. During the early stage of basin development, the high-relief margin, narrow shelf, stable or falling relative sea level, seismicity, and presumably high sedimentation rate caused accumulation of thick and areally extensive deep-water fans. Seismic-scale sandstone injections deform the fans.
A fully prograding margin developed when the shelf-to-basin profile lowered, apparently because of increased subsidence of the northern part. This stage of the basin development is generally characterized by the presence of sigmoid clinoform shifts creating an ascending shelf-edge trajectory that is implying steady or rising relative sea level with an accommodation-to-sediment supply ratio of greater than 1, implying sand accumulation on the shelf. This study suggests that some volume of sand was transported into the deep water during relative sea level rise considering the narrow shelf and inferred high rates of sediment supply.
We use three-dimensional seismic reflection data and new map-based structural restoration methods to define the displacement history and characteristics of a series of tear faults in the deep-water Niger Delta. Deformation in the deep-water Niger Delta is focused mostly within two fold-and-thrust belts that accommodate downdip shortening produced by updip extension on the continental shelf. This shortening is accommodated by a series of thrust sheets that are locally cut by strike-slip faults. Through seismic mapping and interpretation, we resolve these strike-slip faults to be tear faults that share a common detachment level with the thrust faults. Acting in conjunction, these structures have accommodated a north –south gradient in westward-directed shortening. We apply a map-based restoration technique implemented in Gocad to restore an upper stratigraphic horizon of the late Oligocene and use this analysis to calculate slip profiles along the strike-slip faults. The slip magnitudes and directions change abruptly along the lengths of the tear faults as they interact with numerous thrust sheets. The discontinuous nature of these slip profiles reflects the manner in which they have accommodated differential movement between the footwall and hanging-wall blocks of the thrust sheets. In cases for which the relationship between a strike-slip fault and multiple thrust faults is unclear, the recognition of this type of slip profile may distinguish thin-skinned tear faults from more conventional deep-seated, throughgoing strike-slip faults.
The petroleum trap for the Athabasca oil sands has remained elusive because it was destroyed by flexural loading of the Western Canada Sedimentary Basin during the Late Cretaceous and Paleocene. The original trap extent is preserved because the oil was biodegraded to immobile bitumen as the trap was being charged during the Late Cretaceous. Using well and outcrop data, it is possible to reconstruct the Cretaceous overburden horizons beyond the limit of present-day erosion. Sequential restoration of the reconstructed horizons reveals a megatrap at the top of the Wabiskaw-McMurray reservoir in the Athabasca area at 84 Ma (late Santonian). The megatrap is a four-way anticline with dimensions 285 x 125 km (177 x 78 mi) and maximum amplitude of 60 m (197 ft). The southeastern margin of the anticline shows good conformance to the bitumen edge for 140 km (87 mi). To the northeast of the anticline, bitumen is present in a shallower trap domain in what is interpreted to be an onlap trap onto the Canadian Shield; leakage along the onlap edge is indicated by tarry bitumen outliers preserved in basement rocks farther to the northeast. Peripheral trap domains that lie below the paleospillpoint, in northern, southern, and southwestern Athabasca, and Wabasca, are interpreted to represent a late charge of oil that was trapped by bitumen already emplaced in the anticline and the northeastern onlap trap. This is consistent with kimberlite intrusions containing live bitumen, which indicate that the northern trap domain was charged not before 78 Ma. The trap restoration has been tested using bitumen-water contact well picks. The restored picks fall into groups that are consistent both with the trap domains determined from the top reservoir restoration and the conceptual charge model in which the four-way anticline was filled first, followed by the northeastern onlap trap, and then the peripheral trap domains.
“One man was at the head waters of the River Amazon among the headshrinkers when he was recalled to come to Iraq; another came from Argentina, another from Mexico, still another had been in Romania, one in Indo-China, several in Venezuela and the East Indies.”
Geologists, cognitive scientists, software developers and other industry stakeholders put their heads together at a recent Hedberg conference to share insights on the 3-D interpretation and spatial thinking skills that are vital to geoscience.
The Molasse Basin represents the northern foreland basin of the Alps. After decades of exploration, it is considered to be mature in terms of hydrocarbon exploration. However, geological evolution and hydrocarbon potential of its imbricated southernmost part (Molasse fold and thrust belt) are still poorly understood. In this study, structural and petroleum systems models are integrated to explore the hydrocarbon potential of the Perwang imbricates in the western part of the Austrian Molasse Basin.
The structural model shows that total tectonic shortening in the modeled north–south section is at least 32.3 km (20.1 mi) and provides a realistic input for the petroleum systems model. Formation temperatures show present-day heat flows decreasing toward the south from 60 to 41 mW/m2. Maturity data indicate very low paleoheat flows decreasing southward from 43 to 28 mW/m2. The higher present-day heat flow probably indicates an increase in heat flow during the Pliocene and Pleistocene.
Apart from oil generated below the imbricated zone and captured in autochthonous Molasse rocks in the foreland area, oil stains in the Perwang imbricates and oil-source rock correlations argue for a second migration system based on hydrocarbon generation inside the imbricates. This assumption is supported by the models presented in this study. However, the model-derived low transformation ratios (20%) indicate a charge risk. In addition, the success for future exploration strongly depends on the existence of migration conduits along the thrust planes during charge and on potential traps retaining their integrity during recent basin uplift.
We present a method of using fault displacement-distance profiles to distinguish fault-bend, shear fault-bend, and fault-propagation folds, and use these insights to guide balanced and retrodeformable interpretations of these structures. We first describe the displacement profiles associated with different end-member fault-related folding models, then provide examples of structures that are consistent with these model-based predictions. Natural examples are imaged in high-resolution two- and three dimensional seismic reflection data sets from the Niger Delta, Sichuan Basin, Sierras Pampeanas, and Cascadia to record variations in displacement with distance updip along faults (termed displacement-distance profiles). Fault-bend folds exhibit constant displacement along fault segments and changes in displacement associated with bends in faults, shear fault-bend folds demonstrate an increase in displacement through the shearing interval, and fault-propagation folds exhibit decreasing displacement toward the fault tip. More complex structures are then investigated using this method, demonstrating that displacement-distance profiles can be used to provide insight into structures that involve multiple fault-related folding processes or have changed kinematic behavior over time. These interpretations are supported by comparison with the kinematics inferred from the geometry of growth strata overlying these structures. Collectively, these analyses illustrate that the displacement-distance approach can provide valuable insights into the styles of fault-related folding.
Thirty-seven mudstone samples were collected from the uppermost Lower Mudstone Member of the Potrerillos Formation in El Gordo minibasin within La Popa Basin, Mexico. The unit is exposed in a circular pattern at the earth's surface and is intersected by El Gordo diapir in the northeast part of the minibasin. Vitrinite reflectance (Ro) results show that samples along the eastern side of the minibasin (i.e., south of the diapir) are mostly thermally immature to low maturity (Ro ranges from 0.53% to 0.64%). Vitrinite values along the southern, western, and northwestern part of the minibasin range between 0.67% and 0.85%. Values of Ro immediately northwest of the diapir are the highest, reaching a maximum of 1.44%. The results are consistent with two different possibilities: (1) that the diapir plunges to the northwest, or (2) that a focused high-temperature heat flow existed along just the northwest margin of the diapir. If the plunging diapir interpretation is correct, then the thermally immature area south of the diapir was in a subsalt position, and the high-maturity area northwest of the diapir was in a suprasalt position prior to Tertiary uplift and erosion. If a presumed salt source at depth to the northwest of El Gordo also fed El Papalote diapir, which is located just to the north of El Gordo diapir, then the tabular halokinetic sequences that are found only along the east side of El Papalote may be subsalt features. However, if the diapir is subvertical and the high-maturity values northwest of the diapir are caused by prolonged, high-temperature fluid flow along just the northwestern margin of the diapir, then both of these scenarios are in disagreement with previously published numerical models. This disagreement arises because the models predict that thermal anomalies will extend outward from a diapir a distance roughly 1.5 times the radius of the diapir, but the results reported here show that the anomalous values on one side of the diapir are about two times the radius, whereas they are as much as five times the radius on the other side of the diapir. The results indicate that strata adjacent to salt margins may experience significantly different heat histories adjacent to different margins of diapirs that result in strikingly different diagenetic histories, even at the same depth.
In 2020, AAPG will launch its first GTW (Geosciences Technology Workshop) in Mozambique, partnering with ENH (Mozambique National Oil and Gas Company) with a focus on deepwater reservoirs and LNG. The goal will be to build scientific knowledge, discover innovations, and network with peers. AAPG has established the GTWs as the primary vehicle for scientific and technological knowledge exchange throughout the world.
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.
Date: 28 February 2020 (8:00 am - 1:00 pm) -->
The University of Papua New Guinea is organizing a Field Trip on 28 February 2020 (08.00 – 13.00).
More details to come.
This Field Trip is organized independently by the University.
Registrations will be accepted on-site, on 24 February at the Hilton Hotel, Conference Hall 1; 3.00-6.00 pm. University staff will also be present on 27 February 10.00 am-1.00 pm.
The Field Trip as outlined above is organized by the University of Papua New Guinea and not by AAPG/EAGE. By signing up for the 'UPNG Field Trip', Attendees accept and agree to indemnify and hold harmless AAPG & EAGE and its governing board, officers, employees, and representatives from any liability, including but not limited to injury or death of said Attendee, or any person(s) and damage to property that may result from participation in the described activity.
View Geology of Port Moresby
Date: 28 February 2020 (Half Day)
PNG LNG is an integrated development that is commercializing the gas resources of Papua New Guinea. Our operations are producing over 8 million tonnes of liquefied natural gas (LNG) each year which is exported to four major customers in the Asia region.
The site tour will offer attendees an exclusive look at world class integrated development that includes gas production and processing facilities that extend form Hela, Southern Highlands, Western and Gulf provinces to Port Moresby in Central Province.
Registration is free of charge. Limited to 25 pax on a first-come-first-served basis. Registration Information can be found at https://eage.eventsair.com/1st-aapgeage-png/registration-
7.00am - 7:20am (20min)
Registration of conference delegates at Hilton Hotel (Photo ID mandatory)
7:30am - 8: 15am (45min)
Travel to PNG LNG Plant from Hilton Hotel
8:15am – 8:30am (15min)
Security screening at Gate 1 and board BCI bus
8:30am – 9:15am (45min)
Drive up to Viewing Deck & Overview by ExxonMobil PNG team
9:15am – 10:45am (1.5hr)
Areas to visit
• Central Control Room
• Utilities & Marine Terminal
• Park at Marine Terminal
• Return from Marine through Utilities to Gate 1
10:45am – 11:00am (15min)
Go through security screening and board bus
11:00am – 11:45am (45min)
Return from PNG LNG Plant to Hilton Hotel
The ExxonMobil LNG Plant Tour is organised by ExxonMobil; not by AAPG/EAGE. By signing up for the ExxonMobil LNG Plant Tour, Attendees accept and agree to indemnify and hold harmless AAPG & EAGE and its governing board, officers, employees, and representatives from any liability, including but not limited to injury or death of said Attendee or any person(s) and damage to property that may result from participation in the described activity.
Date: Friday 28 – Saturday 29 February 2020 (2 days)
Instructor: Ken McClay, Professor of Structural Geology
This 2 day short course will focus firstly on the development of extensional basins, rifts and passive margins followed by inversion of these systems and the formation of thick and thin-skinned thrust belts. Extensional fault geometries, segmentation and linkages will be analysed as well as the architectures of extensional basins illustrated with field examples from the Gulf of Suez and Northern Red Sea as well as seismic examples from rift basins and passive margins. Inversion systems will be discussed in the context of how basement rift fault systems influence and control inversion geometries. Thick and thin-skinned orogenic systems will be examined in the context of inverted basins and thin-skinned thrust systems using examples from PNG, the Pyrenees, the Zagros fold and thrust belt and other systems. Characteristic structural styles and hydrocarbon systems in these terranes will be will be copiously illustrated using field, seismic, physical sand box and numerical models.
Who should attend:
Final year Geoscience students; starting geoscientists in the petroleum industry as well as mid- senior level geoscientists needing modern concepts of structural geology for the petroleum industry.
Participants to bring a notebook.
Tea Break x AM
Tea Break x PM
Ken McClay, Professor of Structural Geology, - BSc Honours degree in Economic Geology from Adelaide University, - MSc in Structural Geology & Rock Mechanics and PhD in Structural Geology from Imperial College, University of London, and DSc from Adelaide University: Emeritus Professor in the Department of Earth Sciences, Royal Holloway University of London and an Adjunct Professor in the Australian School of Petroleum at Adelaide University.
From 1991 until December 2018 he was Professor of Structural Geology and Director of the Fault Dynamics Research Group at Royal Holloway University of London. He carried out wide-ranging research on all aspects of applied structural geology. This has involved field research in NW Scotland, the Spanish Pyrenees, Indonesia, Yemen, Iran, Australia, Canada, USA, Chile, Argentina, Greenland, Norway, Turkey, Ethiopia and Gulf of Suez and Red Sea Egypt. His research interests include extensional, strike-slip, thrust and inversion terranes. He ran a large experimental analogue modelling laboratory for the simulation of fault structures and sedimentary architectures at Royal Holloway. He has written a book for mapping structures in the field, edited five major volumes on thrust tectonics, and has published widely on structural geology and tectonics and he is a consultant for the international petroleum industry and has given many short courses for the industry.
Ken focuses on field analogues for geological structures to illustrate structural styles and mechanical stratigraphy, on analogue modelling of faults and fold systems and on seismic interpretation of sub-surface structures. Current major research projects include tectonic evolution of the Northern Chilean Andes, fold and thrust belts in accretionary terranes, tectonic evolution of deep-water fold belts as well as extensional tectonics and structural evolution of the NW Shelf of Australia.
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.
The Betic hinterland, in the westernmost Mediterranean, constitutes a unique example of a stack of metamorphic units. Using a three-dimensional model for the crustal structure of the Betics-Rif area this talk will address the role of crustal flow simultaneously to upper-crustal low-angle faulting in the origin and evolution of the topography.
Request a visit from Juan I. Soto!
In comparison with the known boundary conditions that promote salt deformation and flow in sedimentary basins, the processes involved with the mobilization of clay-rich detrital sediments are far less well established. This talk will use seismic examples in different tectonic settings to document the variety of shale geometries that can be formed under brittle and ductile deformations.
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