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Soft Rock Seminar: Julio Leva
Start:December 3, 2012 at 12:00 pm
End:
December 3, 2012 at 1:00 pm
Location:
JGB 3.222
Contact:
Rattanaporn Fongngern (Jah), rattanapornf@utexas.edu
BEG Friday Seminar Series: Dr. Osareni Ogiesoba, BEG
Start:December 7, 2012 at 9:00 am
End:
December 7, 2012 at 10:00 am
Location:
J.J. Pickle Research Campus, Bldg. 130, room #1.202
Video Streaming: Not available for this seminar
SEISMIC INVERSION FOR SHALE GAS/OIL IN THE AUSTIN CHALK AND EAGLE FORD SHALE IN A SUBMARINE VOLCANIC TERRAIN, MAVERICK BASIN, SOUTH TEXAS
Osareni (Chris) Ogiesoba
Bureau of Economic Geology (STARR)
Hydrocarbon exploration in the Austin Chalk began in 1916 with the discovery of hydrocarbon traps located in and around volcanic centers (serpentine plugs) encased by Austin Chalk. Owing to the occurrence of hydrocarbons around these serpentine plugs, exploration efforts were focused on identifying surface as well as subsurface locations of volcanic centers within the Austin Chalk. However, with the realization of the existence of fault-related, fractured reservoirs within the Austin Chalk in the 1980’s, fault zones became the main target of exploration—and the drilling spree started. To date, more than 2,000 horizontal wells have been drilled within the Austin Chalk.
Although some of these wells were successful, many others failed either because they did not penetrate hydrocarbon sweet spots, or hydrocarbon-source-rock distribution within and outside the Austin Chalk was unknown. In this project, seismic inversion studies was conducted by combining seismic data with wireline logs to determine sweet spots and predict resistivity distribution (using the deep-induction log) within the Austin Chalk and Eagle Ford Shale in South Texas.
Results show that >90% of productive zones are in the lower part of the Austin Chalk and are associated with Eagle Ford vertical-subvertical en echelon faults, suggesting hydrocarbon migration from the Eagle Ford Shale. Furthermore, the lower Austin Chalk and upper Eagle Ford Shale together appear to constitute a continuous (unconventional) hydrocarbon play.
In addition, local accumulations within the Austin Chalk may be related to Austin TOC-rich zones or migration from the Eagle Ford through fractures. The quality-factor attribute (Q) can serve as a tool for detecting high-water saturated zones. Although Q was not selected as one of the primary attributes for predicting resistivity, it nevertheless can serve as a good reconnaissance tool for predicting resistivity and brittle zones. Wells that have high water production do so because the water-bearing middle Austin Chalk that sits on the downthrown side of Eagle Ford regional faults constitutes a large section of the horizontal well, as evidenced by the Q attribute. Finally, based on the seismic stratigraphic positions of identified submarine volcanic mounds within the Austin Chalk, volcanic activity probably continued up middle Campanian time.
JSG Fall Graduation
Start:December 8, 2012 at 1:00 pm
End:
December 8, 2012 at 3:00 pm
Location:
McCullough Theatre (in the Performing Arts Complex)
Contact:
Erin Negron, erin.negron@jsg.utexas.edu, 512-471-5870
View Event
Event: The Jackson School of Geosciences 2012 Fall Commencement Ceremony and Reception
Speaker: Brewster McCracken
Reception: Immediately following ceremony, at Holland Family Student Center (JGB), refreshments will be served
DeFord Lecture | Mattia PistoneMarch, 05 2026Time: 3:30 PM - 4:30 PMLocation: JGB 2.324 Exploring Gas Accumulation in Magmas: Bridging the Gap Between Field and Laboratory Measurements by Mattia Pistone, associate professor at the University of Georgia Abstract: Gas accumulation in magmas prior to eruptions represents a key process that controls the explosivity of volcanoes. The efficiency of accumulating gas in a magma is modulated by chemical and physical parameters such as magma ascent rate, modal proportions of melt, minerals, and exsolved fluids in the magma, and geochemistry of mafic to felsic magmas and associated fluids. Currently, we deal with an interesting conundrum of data acquisition. In the field, we largely monitor and study mafic volcanoes because they degas and erupt more frequently than their felsic counterparts. Vice versa, in the lab, we often study pre-eruptive gas accumulation in felsic magmas that are commonly associated to the most hazardous volcanism. In this case, lab experiments are often conducted using felsic materials because they are thick/viscous (all the phases including gas bubbles are efficiently trapped), undercooled (“slow and lazy” in crystallising), and geochemically evolved (their composition does not change much during the experiment). In this seminar, I want to explore this dichotomy of lessons that we gain from natural volcanoes and laboratory. Based on my research in the lab and in the field, I will showcase my attempt in filling the existing gap in knowledge between mafic and felsic systems by exploring: 1) how gas bubbles influence magma transport, and 2) how gas geochemistry modulates the level of isolated porosity in magmas. |
Bureau of Economic Geology Seminar SeriesMarch, 06 2026Time: 1:00 PM - 2:00 PMLocation: BEG VR Room 1.116C BEG Seminar presented by Dr. Gabriel Pasquet, in person. Topic: Natural hydrogen, field survey, Texas |
UTIG Spring Seminar Series 2026: Andrew HoffmanMarch, 06 2026Time: 10:30 AM - 11:30 AMLocation: UTIG Seminar Conference Room - 10601 Burnet Road, Bldg. 196/ROC 1.603 More details on this seminar will be available soon. |
DeFord Lecture | Sarah KatzMarch, 12 2026Time: 3:30 PM - 4:30 PMLocation: JGB 2.324 Andean Climate and Hydrology over the Last 650,000 Years: Insights from Lake Junín, Peru by Sarah Katz, postdoctoral associate at the Department of Earth and Planetary Sciences at Yale University Abstract: In this talk, I will discuss the hydroclimate history of the central Peruvian Andes over the last 650,000 years. Specifically, I will show how carbonate clumped and triple oxygen isotope measurements from Lake Junín (11°S) sediment cores can be used to reconstruct ancient monsoon dynamics, local water balance and temperatures, and sediment transport in the basin. First, I will present evidence linking South American Monsoon intensity to Earth’s orbital configuration during two recent interglacial periods. Further, I will show that these forcings directly impact local water balance, linking tropical hydroclimate to global climate forcings. Second, we will examine the glacial intervals of the core when carbonate isotope stratigraphy is compromised by detrital carbonates; I will present a framework for using clumped isotopes to extract meaningful paleoclimate information from the Junín cores and other carbonate archives. |
Bureau of Economic Geology Seminar SeriesMarch, 13 2026Time: 1:00 PM - 2:00 PMLocation: BEG VR Room 1.116C BEG Seminar presented by Dr. Zoltan Sylvester in person. Topic: Accreting, fast and slow: Geometry, kinematics and sediment load of sinuous channels |
UTIG Spring Seminar Series 2026: Craig MartinMarch, 13 2026Time: 10:30 AM - 11:30 AMLocation: UTIG Seminar Conference Room - 10601 Burnet Road, Bldg. 196/ROC 1.603 More details on this seminar will be available soon. |
2026 Solar Climate Intervention Impacts on Extremes (SCI-EX) WorkshopMarch, 25 2026Time: 12:00 AM - 12:00 AMLocation: UTIG Seminar Conference Room - 10601 Burnet Road, Bldg. 196/ROC 1.603 About the 2026 Solar Climate Intervention Impacts on Extremes WorkshopThe first SCI-EX workshop will focus on impacts on extreme climate events under stratospheric aerosol injection (SAI) and marine cloud brightening (MCB). The goal of the workshop is to explore and develop internal and external collaborations to expand and advance solar climate intervention research at UT Austin. The workshop will be organized around three main topics, including (1) Downscaled and high-resolution SCI simulations, (2) Cascading and compounding extremes under SCI, and (3) S2S2D predictability under SCI. We will also have speakers that will be discussing ethical and funding considerations of SCI research. For more information, including how to submit an abstract, please reach out to Danielle Touma. |
Bureau of Economic Geology Seminar SeriesMarch, 27 2026Time: 1:00 PM - 2:00 PMLocation: BEG VR Room 1.116C BEG Seminar presented by Dr. Daniella Rempe (EPS UT Austin) in person Topic: Hydrology, near surface environment |
UTIG Spring Seminar Series 2026: Rachel AbercrombieMarch, 27 2026Time: 10:30 AM - 11:30 AMLocation: UTIG Seminar Conference Room - 10601 Burnet Road, Bldg. 196/ROC 1.603 More details on this seminar will be available soon. |