Explorer Geophysical Corner

'The geobody tool provides a means for an interpreter to rapidly visualize the extent and orientation of anomalous geologic features of interest. However, the last decade has seen an exponential growth in both the number and size of 3-D seismic surveys. Augmented by multiple attribute volumes for each survey, these large data volumes provide both an aid and a burden on the interpreter, whose goal is to wade through all these data with the goal of extracting patterns that correlate to a geologic model, which can then be used for oil and gas exploration and development. As many of the world’s oil and gas resources lie beneath the oceans, the advances in exploration, drilling and production technologies have also focused in those areas. '

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American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

“Geologists and geophysicists work well together.” That’s Stephen A. Sonnenberg on why AAPG and the Society of Exploration Geophysicists will be coming together for the International Meeting for Applied Geoscience and Energy at the Colorado Convention Center in Denver and online, Sept. 26 through Oct. 1. This year’s inaugural hybrid event will include nearly 200 technical presentations, 14 workshops, 10 special sessions, five field trips, numerous networking opportunities and a joint exhibition showcasing the latest geoscience products and technologies will be on hand.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

The International Meeting for Applied Geoscience and Energy, or IMAGE ’21, the integrated annual convention of AAPG and the Society of Exploration Geophysicists in conjunction with the Society for Sedimentary Geology, is all set for its inaugural event to be held online and in-person in Denver, Colo., Sept. 26 to Oct. 1. This gathering of the industry’s top thinkers, leaders and innovators boasts an impressive schedule of special sessions, workshops, field trips and other offerings to expand geoscience and professional skills.

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American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

Overall, machine learning has introduced us to a whole different world that has taken geoscientists by surprise. However, the real question is how much can we trust the machine? How accurate can it be? And the most intriguing question of all – can machine learning replace the interpreter? We will analyze three machine learning processes to assess the pros and cons of utilization of convolutional neural networks for fault prediction versus interpretations made by the user in a highly complex polygonal fault section of a 3-D seismic reflection dataset.

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American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

Blending of seismic attributes with additive primary colors is a standard visualization procedure used by interpreters to integrate the information contained in them and carry out comprehensive interpretation. In the December 2019 and February 2020 installments of Geophysical Corner, we described how color is perceived by the human eye, and how colors are rendered on interpretation workstation monitors. We also described the additive RGB color model which forms the working model for computer monitors, as well as the subtractive CMYK model and the HSV and HSL color models frequently used for covisualizing seismic attributes.

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American Association of Petroleum Geologists (AAPG)
Explorer Emphasis Article

Analog traps are an important part of any geoscientist’s tool kit, and there is no better source than understanding how giant fields form and have been found by past and current generations of explorers. My sojourn into learning about these big fields was in the mid-1980s at Amoco in Denver, part of a task force charged with understanding how to better explore for big, subtle, stratigraphic and combination traps. Meeting weekly for lunch for several months, a team of us reviewed Amoco’s proprietary “Red Book” – a collection of summaries of giant fields worldwide, which included maps and rock properties, but, more importantly, the strategy used in finding each field. In addition, we pulled heavily from AAPG giant fields publications compiled from hundreds of AAPG volunteers.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

Just as Alaska was bracing itself for the economic fallout of the Biden administration’s adversarial stance on oil and gas, two recent court decisions are giving the state hope. On June 15, a federal judge lifted the administration’s temporary ban on federal lease sales, clearing the way for a highly anticipated lease sale in the prolific National Petroleum Reserve – Alaska. And, on May 26, a brief filed by the U.S. Department of Justice affirmed that the Willow Project, a major discovery in NPRA that has been tied up in environmental-related lawsuits, complies with environmental regulations. While it remains unclear how soon the NPRA lease sale can take place, it is expected that the Willow project, one of the North Slope’s largest projects in recent years, will move forward.

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American Association of Petroleum Geologists (AAPG)
Explorer Article

Increasing global concern about climate change and its impact on the environment and society has led to a variety of strategies to reduce carbon dioxide emissions and to remove CO₂ from the atmosphere and find places to store it. Many companies are hard at work to perfect methods of carbon capture, use, and storage. Franek Hasiuk, associate scientist at Kansas Geological Survey, said CCUS is the best technology available to reduce emissions produced by the global economy. Hasiuk is part of a team of scientists working on the Integrated Midcontinent Stacked Carbon Storage Hub, a project to investigate subsurface geology in southwest Kansas and southwest Nebraska and demonstrate the viability of injecting CO₂ into underground rock layers.

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American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

Whatever the style of faulting, manual interpretation of faults on vertical seismic sections is traditionally a laborious and time-consuming process. Seismic attributes such as coherence, variance and Sobel filters accelerate the fault interpretation process. Fault-sensitive attributes can be further subjected to image enhancement methods such as swarm intelligence, Radon transforms, and smoothing and sharpening filters aligned parallel and perpendicular to the fault attribute anomaly. One such development is the fault likelihood attribute.

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American Association of Petroleum Geologists (AAPG)
Explorer Regions and Sections

The overriding principle of AAPG’s special interest groups is to create an environment in which experienced professionals with like-minded views and concerns can come together to discuss, share, commiserate and become familiar with industry trends and Association events. Further, such groups create an environment in which individual members, including those in academia and service companies, as well as those in non-petroleum-based companies, both contribute to and benefit from programs and events of interest. The geoscience community in Kuala Lumpur, Malaysia was no stranger to the concept. For years, there was a SIG for young professionals, but the thinking was that there also needed to be something tailored for the experienced professional.

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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, 19 August 2010, 12:00 a.m.–12:00 a.m.

This presentation will show where there are cases of missing sections, but none of them can be attributed to normal faulting.

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)
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

Three-dimensional (3D) seismic-reflection surveys provide one of the most important data types for understanding subsurface depositional systems. Quantitative analysis is commonly restricted to geophysical interpretation of elastic properties of rocks in the subsurface. Wide availability of 3D seismic-reflection data and integration provide opportunities for quantitative analysis of subsurface stratigraphic sequences. Here, we integrate traditional seismic-stratigraphic interpretation with quantitative geomorphologic analysis and numerical modeling to explore new insights into submarine-channel evolution.

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Request a visit from Jacob Covault!

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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