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Brines currently being produced in the East Poplar and Northwest Poplar oil fields, Williston Basin, Montana, are of two chemically and isotopically distinct types. The solute chemistry and Sr composition of group I brines are similar to those that contaminated the groundwater.
American Association of Petroleum Geologists (AAPG)
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Pervasive deformation band arrays delay water breakthrough and enhance sweep when the contrast of permeability between them and the host rock is at least of three orders of magnitude, resulting in larger final produced volumes and higher total recovery.
American Association of Petroleum Geologists (AAPG)
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Events Blog


Be a part of the most vibrant and vital integrated science and technology event for unconventional play development and its significance for the U.S. and global energy future. Share your innovations, ideas and experiences at the industry’s leading forum for discussions of advancements in unconventional resources.

American Association of Petroleum Geologists (AAPG)
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As these are challenging times in our industry, we understand the need to be strategic and judicious with your company’s marketing and sponsorship investments. Secure your sponsorships now for ACE 2017 and choose the mix of items, events and activities that align with the specific marketing goals of your business.

American Association of Petroleum Geologists (AAPG)
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Explorer Emphasis


Understanding the complex makeup of reservoirs is essential, and it requires considerable evaluation and time.

American Association of Petroleum Geologists (AAPG)
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Explorer President’s Column


September is the practical beginning of the year – for many in North America, at least: the beginning of the school year for those with school-aged children, the beginning of the program year for many affiliated societies and the beginning of many AAPG-related events.

American Association of Petroleum Geologists (AAPG)
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Explorer ProTracks


The Pacific Section’s Young Professionals Special Interest Group is working to be more involved and active in the wake of the current industry environment.

American Association of Petroleum Geologists (AAPG)
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Foundation Update


Geoscience students researching energy related theses can count on support from the AAPG Foundation – especially during the down times. Investing in education is a top priority for the Foundation. During the 2016-17 grant cycle, AAPG Foundation will award $269,000 to master’s and doctorate students worldwide.

American Association of Petroleum Geologists (AAPG)
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Learn! Blog


A drone-generated map can translate to a million-dollar cost saving, or new fields or offsets with millions of dollars of new revenue. It's a great ROI, and the potential is just now beginning to be explored. For example, high-definition digital images can, depending on the sensors used, result in maps that show previously undetected structures and also surface geochemical anomalies, such as oil and gas micro-seeps or haloes. Welcome to an interview with Jason Pedersen, Space City Drones (, who discusses the new equipment, techniques, and opportunities with drones.

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You may not be aware that there was a super-Greenhouse environment during the Cretaceous, and that there were super-storms associated with it, and that analyzing the sediments deposited during that time can provide insight into the potential warming of climates, and also the cross-shelf transport of sediments. That is just one of many fascinating new areas of research that looks at data through new lenses, and with new analytical techniques. Welcome to an interview with Lesli J. Wood, Weimer Distinguished Chair and Professor in Sedimentary and Petroleum Geology, Colorado School of Mines.

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Billings Montana United States 14 November, 2016 14 November, 2016 34458
Billings, Montana, United States
14 November 2016

Lecture Title: “Mudrocks (shales, mudstones) at the Scale of Grains and Pores: Current Understanding.”
Venue: McCormick Café Conference Room, 2419 Montana Avenue, Billings, MT 59101
Time: Lunch 11:30am, Lecture 12Noon

Pocatello Idaho United States 16 November, 2016 16 November, 2016 34463
Pocatello, Idaho, United States
16 November 2016

Lecture Title: “Mudrocks (shales, mudstones) at the Scale of Grains and Pores: Current Understanding.”
Venue: Idaho State University, 921 S. 8th Ave., Pocatello, ID 83209, Chemistry Room 140
Time: 4:00pm

Houston Texas United States 01 April, 2017 01 April, 2017 33585
Houston, Texas, United States
1 April 2017

Houston Texas United States 02 April, 2017 02 April, 2017 33586
Houston, Texas, United States
2 April 2017

Billings Montana United States 25 June, 2017 28 June, 2017 14323
Billings, Montana, United States
25-28 June 2017

Save the date for the 2017 AAPG Rocky Mountain Section Meeting to be held in Billings, Montana. Watch the website for details to come. 

Casper Wyoming United States 18 August, 2017 22 August, 2017 33928
Casper, Wyoming, United States
18-22 August 2017

The primary goal of the AAPG Astrogeology Committee is to emphasize the use of geosciences in the development of off-world exploration energy and other natural resources for development in the foreseeable future. This is under the guidance and input provided by previous NASA geologist astronauts, Dr. Harrison “Jack” Schmitt and Dr. James “Jim” Reilly and by industry professionals.

Coming Soon

Check back often. "Find an Expert" feature is coming online soon!

Andrew M. Hennes Andrew M. Hennes President (2016-2017) SM Energy Company (406) 869-8724
Catherine Elizabeth Campbell Catherine Elizabeth Campbell Past President (2016-2017) Robert L. Bayless, Producer LLC (303) 382-0914
Julia Rausch Lemaster Julia Rausch Lemaster President Elect (2016-2017) Goolsby, Finley and Associates, LLC (307) 266-3199
Lynette D. W. George Lynette D. W. George Secretary Treasurer (2016-2017) (307) 265-6338
Heidi E. Schoenstein Heidi E. Schoenstein Secretary Treasurer Elect (2016-2017)
John Clay Lorenz John Clay Lorenz Advisory Counselor (2015-2018) FractureStudies LLC (505) 231-6235

The House of Delegates of the AAPG is made up of delegates from affiliated societies and international regions throughout the world. They are selected by popular vote from within their respective areas and serve a three year term.

Who Is My Delegate?

NOTE: Membership in an affiliated society does not necessarily constitute membership in the AAPG and vice versa.

Learn more about affiliated societies of the AAPG

States in the Section