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Geochemistry and Basin Modeling

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8486
 
Explorer Article

Robert G. Loucks, a senior research scientist at the Bureau of Economic Geology, University of Texas at Austin, is one of this year’s Robert R. Berg Outstanding Research Award winners. 

8065
 

Seismic data is an important asset in finding sweet spots in shale plays, as AAPG member Joanne Wang discussed at a recent workshop.

8060
 
Explorer Article

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.

8045
 
Explorer Article

Oklahoma! As-yet unlocked SCOOP and STACK plays have plen’y of room for maturation and development.

7963
 
Organic-carbon–rich shales of the lower Marcellus Formation were deposited at the toe and basinward of a prograding clinothem associated with a Mahantango Formation delta complex centered near Harrisburg, Pennsylvania. Distribution of these organic-carbon–rich shales was influenced by shifts in the delta complex driven by changes in rates of accommodation creation and by a topographically high carbonate bank that formed along the Findlay-Algonquin arch during deposition of the Onondaga Formation. Specifically, we interpret the Union Springs member (Shamokin Member of the Marcellus Formation) and the Onondaga Formation as comprising a single third-order depositional sequence. The Onondaga Formation was deposited in the lowstand to transgressive systems tract, and the Union Springs member was deposited in the transgressive, highstand, and falling-stage systems tract. The regional extent of parasequences, systems tracts, and the interpreted depositional sequence suggest that base-level fluctuations were primarily caused by allogenic forcing—eustasy, climate, or regional thermal uplift or subsidence—instead of basement fault reactivation as argued by previous workers. Paleowater depths in the region of Marcellus Formation black mudrock accumulation were at least 330 ft (100 m) as estimated by differences in strata thickness between the northwestern carbonate bank and basinal facies to the southeast. Geochemical analysis indicates anoxic to euxinic bottom-water conditions. These conditions were supported by a deep, stratified basin with a lack of circulation.
7959
 

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.

3789
 
Explorer Emphasis Article

The Final Frontier: The Arctic Circle’s vast, untapped treasures of oil and gas resources beckon explorers to boldly go, despite the daunting technical, political and environmental challenges.

3784
 
Explorer Article

"Breakthrough elegance": ExxonMobil geologists Jeff Ottmann and Kevin Bohacs shared their highly-coveted knowledge on sweet spots and producibility thresholds at a recent Geosciences Technology Workshop on Unconventional Reservoir Quality.

5777
 

The influence of moisture, temperature, coal rank, and differential enthalpy on the methane (CH4) and carbon dioxide (CO2) sorption capacity of coals of different rank has been investigated by using high-pressure sorption isotherms at 303, 318, and 333 K (CH4) and 318, 333, and 348 K (CO2), respectively. The variation of sorption capacity was studied as a function of burial depth of coal seams using the corresponding Langmuir parameters in combination with a geothermal gradient of 0.03 K/m and a normal hydrostatic pressure gradient. Taking the gas content corresponding to 100% gas saturation at maximum burial depth as a reference value, the theoretical CH4 saturation after the uplift of the coal seam was computed as a function of depth. According to these calculations, the change in sorption capacity caused by changing pressure, temperature conditions during uplift will lead consistently to high saturation values. Therefore, the commonly observed undersaturation of coal seams is most likely related to dismigration (losses into adjacent formations and atmosphere). Finally, we attempt to identify sweet spots for CO2-enhanced coalbed methane (CO2-ECBM) production. The CO2-ECBM is expected to become less effective with increasing depth because the CO2-to-CH4 sorption capacity ratio decreases with increasing temperature and pressure. Furthermore, CO2-ECBM efficiency will decrease with increasing maturity because of the highest sorption capacity ratio and affinity difference between CO2 and CH4 for low mature coals.

5776
 

The origin of thermogenic natural gas in the shallow stratigraphy of northeastern Pennsylvania is associated, in part, with interbedded coal identified in numerous outcrops of the Upper Devonian Catskill and Lock Haven Formations. Historically documented and newly identified locations of Upper Devonian coal stringers are shown to be widespread, both laterally across the region and vertically throughout the stratigraphic section of the Catskill and Lock Haven Formations. Coal samples exhibited considerable gas source potential with total organic carbon as high as 44.40% by weight, with a mean of 13.66% for 23 sample locations analyzed. Upper Devonian coal is thermogenically mature; calculated vitrinite reflectances range from 1.25% to 2.89%, with most samples falling within the dry-gas window. Source potential is further supported by gas shows observed while drilling through shallow, identifiable coal horizons, which are at times located within fresh groundwater aquifers. Thermogenic gas detected in area water wells during predrill baseline sampling is determined not only to be naturally occurring, but also common in the region.

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In-Person Training
Salt Lake City Utah United States 14 September, 2014 21 September, 2014 151
 
Salt Lake City, Utah, United States
14-21 September 2014

Participants will learn a specific and comprehensive methodology for finding and developing conventional and unconventional oil and gas resources associated with lake deposits. The seminar will start with the Quaternary Bonneville basin in Utah, to build familiarity with lacustrine depositional processes. Participants then examine world-famous exposures of organic-rich mudstone, fluvial sandstone, and carbonate microbialite facies in Wyoming.

Tulsa Oklahoma United States 07 October, 2014 09 October, 2014 1511
 
Tulsa, Oklahoma, United States
7-9 October 2014

Here is an introduction to the tools and techniques that geologists and geophysicists use to locate gas and oil, that drillers use to drill the wells and that petroleum engineers use to test and complete the wells and produce the gas and oil. Exercises throughout the course provide practical experience in well log correlation, contouring, interpretation of surface and subsurface, contoured maps, seismic interpretation, well log interpretation, and decline curve analysis.

Houston Texas United States 10 November, 2014 11 November, 2014 10487
 
Houston, Texas, United States
10-11 November 2014

This course summarizes the major advances and current controversies in dolomite research.

Houston Texas United States 12 November, 2014 12 November, 2014 10568
 
Houston, Texas, United States
12 November 2014

This course provides a rigorous overview of how and where organic-rich rocks are deposited, how they evolve into oil- and gas-generating source rocks, how the porosity systems evolve with thermal maturation, and the petrophysical properties of shale-gas and shale-liquid fine-grained reservoirs.

Houston Texas United States 12 November, 2014 12 November, 2014 10570
 
Houston, Texas, United States
12 November 2014

This course is designed to present the concepts of sedimentary geochemistry and biogeochemistry, along with the framework to interpret elemental and mineralogical records in such organic rich mudstone sequences.

Houston Texas United States 13 November, 2014 13 November, 2014 10379
 
Houston, Texas, United States
13 November 2014

This course is an introduction to the Bakken/Three Forks resource play.

Golden Colorado United States 17 November, 2014 19 November, 2014 10243
 
Golden, Colorado, United States
17-19 November 2014

Participants will learn how to be successful in utilizing the Three Forks in a stacked-pay, pad-drilling strategy when producing various Bakken members.

Houston Texas United States 02 December, 2014 04 December, 2014 1516
 
Houston, Texas, United States
2-4 December 2014

Here is an introduction to the tools and techniques that geologists and geophysicists use to locate gas and oil, that drillers use to drill the wells and that petroleum engineers use to test and complete the wells and produce the gas and oil. Exercises throughout the course provide practical experience in well log correlation, contouring, interpretation of surface and subsurface, contoured maps, seismic interpretation, well log interpretation, and decline curve analysis.

Abilene Texas United States 05 January, 2015 05 January, 2015 10649
 
Abilene, Texas, United States
5 January 2015
The AAPG Southwest Section presents the 2015 Bill Hailey Memorial Short Course in Abilene, Texas. Art Saller will be speaking on Paleozoic carbonates. 
Fort Worth Texas United States 06 January, 2015 06 January, 2015 10658
 
Fort Worth, Texas, United States
6 January 2015
The AAPG Southwest Section presents the 2015 Bill Hailey Memorial Short Course in Fort Worth, Texas. Art Saller will be speaking on Paleozoic carbonates. 
Wellington New Zealand 21 April, 2015 23 April, 2015 10641
 
Wellington, New Zealand
21-23 April 2015

Make plans to attend an AAPG Geosciences Technology Workshop (GTW) to be held in Wellington between April 21-23, 2015. The workshop will comprise four half-day sessions focused on broad depositional environment settings. The aim is to better understand modern depositional systems, and how they can help us to better interpret ancient petroleum reservoirs.

Dubai United Arab Emirates 17 May, 2015 19 May, 2015 10668
 
Dubai, United Arab Emirates
17-19 May 2015

Check the website for details as they develop.

Dead Sea Jordan 08 June, 2015 10 June, 2015 10669
 
Dead Sea, Jordan
8-10 June 2015

Check the website for details as they develop.

14 February, 3000 14 February, 3000 7812
 
14 February, 3000 14 February, 3000 7815
 
14 February, 3000 14 February, 3000 7813
 
14 February, 3000 14 February, 3000 7816
 
Online Training
30 October, 2014 30 October, 2014 11390
 
30 October 2014

Cross disciplinary workflows play an important part of successful characterization of shale reservoirs. This course discusses how the artificial kerogen maturity of organic-rich Green River shale affects the petrophysical, micro-structural, geochemical and elastic properties.

13 December, 2012 13 December, 2012 1494
 
13 December 2012

The course will review core data, petrophysical comparisons, rock physics modeling (including pseudo logs and mechanical properties).

01 January, 2013 01 January, 9999 1459
 
1 January 2013 - 1 January 9999

There are more 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.

10 May, 2012 10 May, 2012 1486
 
10 May 2012

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.

26 September, 2013 26 September, 2013 1497
 
26 September 2013

The presentation will discuss key reservoir information and how to develop a predictive pressure model.

31 October, 2012 31 October, 2012 1492
 
31 October 2012

This e-symposium will focus on how surface geochemical surveys and Downhole Geochemical Imaging technologies can be utilized jointly to directly characterize the composition of hydrocarbons vertically through the prospect section.

16 February, 2012 16 February, 2012 1483
 
16 February 2012

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.

20 January, 2012 20 January, 2012 1482
 
20 January 2012

The Eagle Ford Shale in South Texas is one of the more exciting shale plays in the United States at the current time.

19 May, 2011 19 May, 2011 1474
 
19 May 2011

This e-symposium presents and discusses the results of laboratory tests and research relating to determining shale prospectivity in general, and specifically in the Black Warrior Basin, Alabama.

28 April, 2011 28 April, 2011 1471
 
28 April 2011

The Niobrara Petroleum System of the U.S. Rocky Mountain Region is a major tight petroleum resource play.

17 March, 2011 17 March, 2011 1470
 
17 March 2011

This e-symposium will provide information on which tools, processes, and procedures all geoscientists, engineers, and technical professionals working in shale plays need to understand and implement.

14 December, 2010 14 December, 2010 1467
 
14 December 2010

Recent interest in unconventional gas resources has attracted several oil and gas explorers to sedimentary basins in Southern Quebec.

09 December, 2010 09 December, 2010 1466
 
9 December 2010

The Mississippian-Devonian Bakken Petroleum System of the Williston Basin is characterized by low-porosity and permeability reservoirs, organic-rich source rocks, and regional hydrocarbon charge.

11 November, 2010 11 November, 2010 1465
 
11 November 2010

This e-symposium is ideal for geologists, geophysicists, engineers and other geoscientists who are involved in gas shale exploration and production.

29 October, 2009 29 October, 2009 1445
 
29 October 2009

Expanded package for CEU credit is $100 for AAPG members, and $145 for non-members. Special Student Pricing: $25 for Webinar only; $35 for Expanded package.

16 August, 2011 16 August, 2011 1436
 
16 August 2011

The geochemistry of formation fluids (water and hydrocarbon gases) in the Uinta Basin, Utah, is evaluated at the regional scale based on fluid sampling and compilation of past records.

01 January, 2013 01 January, 9999 1472
 
1 January 2013 - 1 January 9999

This course introduces the learner to the fundamentals of shale gas, including current theories that explain its origin, and how to determine which reservoirs are commercially viable.

01 November, 2013 01 November, 9999 452
 
1 November 2013 - 1 November 9999

This online course provides an overview of the petroleum industry from what is natural gas and crude oil to how to explore, drill, and produce oil and gas.

14 February, 3000 14 February, 3000 7817
 
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