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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 | Courtney SchumacherOctober, 01 2026Time: 3:30 PM - 4:30 PMLocation: JGB 2.324 How Stratiform Rain Shapes Weather, Climate, and the Geological Record by Courtney Schumacher, professor at Texas A&M University |
Bureau of Economic Geology Seminar SeriesOctober, 02 2026Time: 1:00 PM - 2:00 PMLocation: BEG Bldg 130, VR Room 1.116C BEG Seminar presented by Chas Bolton, Research Assistant Professor, UTIG. Topic: The role of aseismic creep, elastic-stress transfer, and pore-pressure diffusion on injection-induced earthquakes: Insights from meter-scale experiments and numerical models Pore-pressure diffusion and the effective stress principle are routinely used to explain induced seismicity. However, as induced seismicity has become more widespread over the past 10+ years it has become apparent that additional mechanisms are needed to explain the richness in fault behavior associated with subsurface fluid injection. Here, I will present results from meter-scale laboratory experiments and numerical modeling that provide new insights into the physics of injection induced earthquakes. The laboratory fault is heavily instrumented with arrays of strain gauges, slip sensors, and pore-pressure transducers that permit spatiotemporal measurements of fault slip, shear stress, and pore-pressure. Frictional instabilities are induced by injecting fluid at constant rate of 5 ml/min into a fault zone that is pre-stressed to ~ 96% of its failure strength. We observe a spectrum of slip modes, including aseismic creep, slow-confined ruptures, and fast-fault spanning instabilities. With progressive fluid injection, instabilities evolve from fast-fault spanning (peak slip rates ~ 20 mm/s) to slow stick-slip (peak slip rates < 0.005 mm/s). Fluid-induced instabilities are preceded by accelerating aseismic creep that is modulated by both fluid pressurization and elastic stress transfer generated by aseismic creep. Fast-fault spanning ruptures occur when the critical nucleation length scale, h*, propagates beyond the pressurized region and into frictionally unstable regions of the fault (i.e., where w/h* < 1). In contrast, slow slip instabilities occur at the end of the experiment when the pore-pressure front as propagated across the fault and increased h* such that w/h* ~ 1. In contrast to some theoretical arguments, laboratory ruptures often propagate well-beyond the leading edge of the pore-pressure front. Together our work shows that that fluid-induced fault slip is driven by a combination of fluid-induced aseismic creep and elastic stress transmission, and could help explain long distance triggering that is common in many areas that host induced seismicity. Join in person in BEG VR Room or on Zoom. |
UTIG Fall Seminar Series 2026: Michaela KingOctober, 02 2026Time: 10:30 AM - 11:30 AMLocation: UTIG Seminar Conference Room - 10601 Burnet Road, Bldg. 196/ROC 1.603 More details about this talk will be available soon. |
Bureau of Economic Geology Seminar SeriesOctober, 09 2026Time: 1:00 PM - 2:00 PMLocation: https://utexas.zoom.us/j/93201377630?pwd=KzF3TW53SFYzSUg4SUZVNGtxd3JvZ BEG Seminar presented by Bruce Hart, Western University, virtual Topic: TBD |
UTIG Fall Seminar Series 2026: Team TERMINUSOctober, 09 2026Time: 10:30 AM - 11:30 AMLocation: UTIG Seminar Conference Room - 10601 Burnet Road, Bldg. 196/ROC 1.603 More details about this talk will be available soon. |
DeFord Lecture | Ching-Yao LaiOctober, 15 2026Time: 3:30 PM - 4:30 PMLocation: JGB 2.324 |
AI and Your Best SelfOctober, 16 2026Time: 5:30 AM - 8:15 AMLocation: Welch Grand Hallway and 2.224 Auditorium Artificial intelligence is breaking free of chatbots and computer screens and moving into the physical world around us. Next-generation AI systems are learning to see, understand, and act in the world the way a person would. In this Hot Science - Cool Talks, pioneer Dr. Kristen Grauman will explore how these systems will one day coach you through a new skill, guide you through an unfamiliar place, or help with everyday tasks by watching and offering real-time feedback, making personalized learning more accessible. Join us for a look at a future where AI is a part of your environment, helping everyone learn, discover, and navigate the world more easily. |
Bureau of Economic Geology Seminar SeriesOctober, 16 2026Time: 1:00 PM - 2:00 PMLocation: BEG Bldg 130, VR Room 1.116C BEG Seminar presented by Ruthie Halberstadt, JSG, in person. Topic: TBD |
UTIG Fall Seminar Series 2026: Denis FeliksonOctober, 16 2026Time: 10:30 AM - 11:30 AMLocation: UTIG Seminar Conference Room - 10601 Burnet Road, Bldg. 196/ROC 1.603 More details about this talk will be available soon. |
DeFord Lecture | Naoki SakaiOctober, 22 2026Time: 3:30 PM - 4:30 PMLocation: JGB 2.324 |
Bureau of Economic Geology Seminar SeriesOctober, 23 2026Time: 1:00 PM - 2:00 PMLocation: BEG Bldg 130, VR Room 1.116C BEG Seminar presented by Ashley Matheny, JSG, in person. Topic: TBD |
UTIG Fall Seminar Series 2026: Zach SickmannOctober, 23 2026Time: 10:30 AM - 11:30 AMLocation: UTIG Seminar Conference Room - 10601 Burnet Road, Bldg. 196/ROC 1.603 More details about this talk will be available soon. |