Explorer Geophysical Corner

Seismic inversion for acoustic impedance is widely used in our industry today, mainly due to the ease and accuracy of interpretation of impedance data, but also because it allows an integrated approach to geological interpretation. In a series of three prior articles of Geophysical Corner, the application of the different methods for transformation of stacked, prestack and multicomponent seismic data into impedance data were described. In this month’s column we revisit one of the methods, namely colored inversion, to describe in detail the methodology entailed and its application to a seismic dataset from Denmark.

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American Association of Petroleum Geologists (AAPG)
Explorer Geophysical Corner

As geoscientists, we are predisposed to associative thinking. Trained for pattern recognition by our education and experiences, we have learned to recognize familiar elements in a new dataset and integrate those pieces of information into a subsurface geological model. However, this learning system is usually biased and most of the time we are unaware of it. With the increasingly common use of machine learning in our workflows to bolster human interpretation, we must become increasingly aware of our biases, so that they they can be minimized as we train the algorithms. Herein is a case study and bias discussion from the Ceará Basin in Brazil, where deep convolutional neural networks are used to aid in the petrophysical analysis and volumetric assessment of a potential reservoir.

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American Association of Petroleum Geologists (AAPG)
Explorer Historical Highlights

To most outsiders in the 1950s, the Buraimi Affair was a passing curiosity, a faraway squabble about territorial rights in a remote corner of southeast Arabia known as the Buraimi Oasis. The British government backed its protégés, Abu Dhabi and Oman, against Saudi Arabia, while the United States government took a mediating role. However, as the Time magazine report suggested, there was another aspect to the dispute: it was rumoured that Buraimi was “floating on a pool of oil.”

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American Association of Petroleum Geologists (AAPG)
Explorer Article

For decades, reservoir characterization has played a crucial role in oil and gas projects – in identifying and extracting hydrocarbons from the subsurface. Now, some geologists and geophysicists are applying their industry expertise to the emerging fields of carbon storage and geothermal energy.

American Association of Petroleum Geologists (AAPG)
Explorer Article

Facing a challenging situation and low demand, geophysical companies found themselves in a hole after the energy industry’s latest, coronavirus-related downturn. They’ve been trying to dig themselves out for the past year. The good news is, that effort now appears to be working, as higher oil prices begin to have an effect and more positive signs emerge in the second half of 2021.

American Association of Petroleum Geologists (AAPG)
Explorer Foundation Update

An historic book is being reopened, and the next chapter in AAPG’s ongoing efforts to recognize, offer and promote geoscience excellence around the world is about to be written. Six diverse and internationally acclaimed geoscientists have been announced for the 2021-22 AAPG-AAPG Foundation Distinguished Lecture season – speaking on a spectacular range of subjects that vary from understanding integrated hydrocarbon systems to utilizing machine learning to recognizing the importance of choices in today’s energy transition.'

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American Association of Petroleum Geologists (AAPG)
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)
Online e-Symposium
Thursday, 10 May 2012, 12:00 a.m.–12:00 a.m.

Recognition and Correlation of the Eagle Ford, Austin Formations in South Texas can be enhanced with High Resolution Biostratigraphy, fossil abundance peaks and Maximum Flooding Surfaces correlated to Upper Cretaceous sequence stratigraphic cycle chart after Gradstein, 2010.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 16 February 2012, 12:00 a.m.–12:00 a.m.

This presentation describes a proven workflow that uses a standard narrow azimuth 3D seismic, conventional logs, image logs and core data to build five key reservoir properties required for an optimal development of shale plays.

American Association of Petroleum Geologists (AAPG)
American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 21 January 2016, 2:00 p.m.–3:00 p.m.

An overview of a new ambient seismic imaging method and applications of the method throughout the lifecycles (exploration through refracing) of unconventional oil and/or gas fields.

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Tuesday, 9 June 2020, 4:00 p.m.–5:00 p.m.

Visiting Geoscientist Susan Morrice shares her personal experience and insight in this talk about opportunities for geoscientists. “Geoscientists have advantages ... They are Time Travellers and have open minds. Bringing this creativity and innovation to your company or starting your own! Challenging times bring silver linings!”

American Association of Petroleum Geologists (AAPG)
Webinar
Virtual Webinar
Thursday, 21 May 2020, 9:00 p.m.–10:00 p.m.

Henry W. Posamentier discusses the application of 3-D seismic stratigraphic analyses to the mitigation of risk associated with lithology prediction prior to drilling – workflows and techniques. Principles and workflows of seismic stratigraphy and seismic geomorphology will be discussed and numerous examples will be shown from a variety of different depositional settings.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 2 October 2014, 2:00 p.m.–3:00 p.m.

This course is ideal for individuals involved in Midland Basin exploration and development. Successful development of Wolfcamp shale oil relies on complex inter-relationships (ultimately interdependencies) within and between a wide variety of scientific disciplines, financial entities, and company partnerships. 

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)
Online e-Symposium
Thursday, 25 March 2010, 12:00 a.m.–12:00 a.m.

The presentation describes a well established fracture modeling workflow that uses a standard 3D seismic, conventional logs, image logs and data from one core to build predictive 3D fracture models that are validated with blind wells.

American Association of Petroleum Geologists (AAPG)
Online e-Symposium
Thursday, 9 February 2012, 12:00 a.m.–12:00 a.m.

Projects in several shales will be discussed, including Marcellus, Eagle Ford, Haynesville, Fayetteville, Montney, and Barnett, as will several seismically-detectable drivers for success including lithofacies, stress, pre-existing fractures, and pore pressure.

American Association of Petroleum Geologists (AAPG)
VG Abstract

The following short course option was developed for geology and geophysics students that have not had much exposure to how geoscience is applied in industry. It can be tailored for undergraduate juniors and seniors or graduate students. The agenda can be modified to meet specific needs and time constraints. Contact the presenter to discuss options.

Request a visit from Fred Schroeder!

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)
VG Abstract

The following short course option was developed for geology and geophysics students that have not had much exposure to how geoscience is applied in industry. It can be tailored for undergraduate juniors and seniors or graduate students. The agenda can be modified to meet specific needs and time constraints.

Request a visit from Fred Schroeder!

American Association of Petroleum Geologists (AAPG)
VG Abstract

The following short course option was developed for geology and geophysics students that have not had much exposure to how geoscience is applied in industry. It can be tailored for undergraduate juniors and seniors or graduate students. The agenda can be modified to meet specific needs and time constraints. Contact the presenter to discuss options.

Request a visit from Fred Schroeder!

American Association of Petroleum Geologists (AAPG)
VG Abstract

The following short course option was developed for geology and geophysics students that have not had much exposure to how geoscience is applied in industry. It can be tailored for undergraduate juniors and seniors or graduate students. The agenda can be modified to meet specific needs and time constraints. Contact the presenter to discuss options.

Request a visit from Fred Schroeder!

American Association of Petroleum Geologists (AAPG)

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