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Petrophysics and Well Logs

Explorer Article

A recent AAPG Geosciences Technology Workshop examined the contributions, challenges and responsibilities of geoscientists in estimating resources and reserves.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

This month’s column deals with determining reservoir heterogeneity in Athabasca oil sands from surface seismic data. 

American Association of Petroleum Geologists (AAPG)
Explorer Article

Shale gas plays can pose a tough problem – but hydraulic fracture stimulation may be the answer.

American Association of Petroleum Geologists (AAPG)
Explorer Article

AAPG’s Distinguished Lecture program is reloaded and already off to a fast start for a season that will send speakers around the world, in some cases, to places never before traveled by the program.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Behind the scenes: You’ve heard about a new report that points to the Arctic as having great potential for hydrocarbon resources. But have you heard how the report was made?

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

A combination of experience and conviction has contributed to the successful career of AAPG Explorer of the Year Michael Johnson.

American Association of Petroleum Geologists (AAPG)
Explorer Division Column EMD

AAPG’S Energy Minerals Division (EMD) will respond to heightened awareness of global energy issues by offering an extensive and diverse selection of sessions, short courses, field trips and forums at the upcoming 2009 AAPG Annual Convention and Exhibition, set for June 7-10 in Denver.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Your shut door, our open window: Current fiscal realities have stalled some projects, but two geologists say now is the perfect time to consider better ways to evaluate shale gas potential.     

American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Field (trip) of dreams: AAPG Honorary Member Roger Slatt is leading a research team in a reservoir characterization study of the Barnett Shale.

American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

The methodology described here may benefit those who are confronted with the problem of interpreting complex structures from limited-quality 3-D seismic images.

American Association of Petroleum Geologists (AAPG)
Workshop
Tulsa, Oklahoma
Tuesday, 18 February Wednesday, 19 February 2025, 7:00 a.m.–5:00 p.m.

Join us for AAPG Orphan, Abandoned, Idle and Marginal Wells Conference 2025. This workshop will focus on orphan, abandoned, idle, and marginal wells and the business opportunities and technology associated with plugging and repurposing wells, reducing methane emissions, protecting water supplies, and extending the lives of marginal wells.

American Association of Petroleum Geologists (AAPG)
Field Seminar
Houston, Texas
Saturday, 1 February 2025, 8:30 a.m.–1:00 p.m.

Everyone in Houston lives within a few miles of a bayou. Some people think of them as permanent, but the bayous are constantly changing, especially during high water events like Hurricane Harvey. This trip is a 2.5 mile walk down a section of Buffalo Bayou where we will look at the archives of past storms and discuss what to do for future storms.

American Association of Petroleum Geologists (AAPG)
Short Course
Tulsa, Oklahoma
Thursday, 20 February 2025, 7:30 a.m.–4:00 p.m.

This introduction to methane monitoring, measurement, and quantification is for all those who would like to understand the requirements and regulations regarding methane emissions and to be able to design a measurement and monitoring solution, complete with the appropriate types of technologies, techniques, and safety protocols.

American Association of Petroleum Geologists (AAPG)
DL Abstract

While there are many habitats that are associated with the deposition of organic-rich marine and lacustrine source rocks, one important pathway is linked to the onset of increased basin subsidence associated with major tectonic events. A key aspect is that this subsidence is spatially variable, with the uplift of basin flanks contemporaneous with the foundering of the basin center, resulting in a steeper basin profile.

Request a visit from Kurt W. Rudolph!

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)
DL Abstract

The Energy sector is a changing business environment. Throughout the 20th century fluctuations of oil supply and demand produced changes in the barrel price that pushed the growth or shrinkage of the industry. In this 21st century, new challenges such as diversification of the energy mix, boosting gas demand, require the exploration of critical minerals and development of new technologies as well.

Request a visit from Fernanda Raggio!

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)
DL Abstract

Subsurface risk and uncertainty are recognized as very important considerations in petroleum geoscience. And even when volume estimates are relatively accurate, the reservoir characteristics that determine well placement and performance can remain highly uncertain. In analyzing results and work practices, three aspects of uncertainty are reviewed here.

Request a visit from Kurt W. Rudolph!

American Association of Petroleum Geologists (AAPG)
DL Abstract

Physics is an essential component of geophysics but there is much that physics cannot know or address. 

Request a visit from John Castagna!

American Association of Petroleum Geologists (AAPG)
DL Abstract

President Biden has laid out a bold and ambitious goal of achieving net-zero carbon emissions in the United States by 2050.  The pathway to that target includes cutting total greenhouse gas emissions in half by 2030 and eliminating them entirely from the nation’s electricity sector by 2035. The Office of Fossil Energy and Carbon Management will play an important role in the transition to net-zero carbon emissions by reducing the environmental impacts of fossil energy production and use – and helping decarbonize other hard-to abate sectors.

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Request a visit from Jennifer Wilcox!

American Association of Petroleum Geologists (AAPG)
VG Abstract

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.

Request a visit from Juan I. Soto!

American Association of Petroleum Geologists (AAPG)
DL Abstract

Engineering of wind farms, development of carbon sequestration projects in shelfal waters, the proliferation of communication cables that connect the world, all of these things suggest that it is time to re-examine what we know about shelf processes both updip-to-downdip and along shoreline, and the influence of shelf processes on erosion and transport of sediments.

Request a visit from Lesli Wood!

American Association of Petroleum Geologists (AAPG)
DL Abstract

Around 170 million years ago, the Gulf of Mexico basin flooded catastrophically, and the pre-existing landscape, which had been a very rugged, arid, semi-desert world, was drowned beneath an inland sea of salt water. The drowned landscape was then buried under kilometers of salt, perfectly preserving the older topography. Now, with high-quality 3D seismic data, the salt appears as a transparent layer, and the details of the drowned world can be seen in exquisite detail, providing a unique snapshot of the world on the eve of the flooding event. We can map out hills and valleys, and a system of river gullies and a large, meandering river system. These rivers in turn fed into a deep central lake, whose surface was about 750m below global sea level. This new knowledge also reveals how the Louann Salt was deposited. In contrast to published models, the salt was deposited in a deep water, hypersaline sea. We can estimate the rate of deposition, and it was very fast; we believe that the entire thickness of several kilometers of salt was laid down in a few tens of thousands of years, making it possibly the fastest sustained deposition seen so far in the geological record.

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Request a visit from Frank Peel!

American Association of Petroleum Geologists (AAPG)

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