SEMINAR: MGG Student Seminar TOMORROW: Wed. 3/28, 12-1 PM, Jan Norbisrath & Qiong Zhang

[Pierpaolo Marchesini <pmarchesini@rsmas.miami.edu>]

MGG STUDENT SEMINAR

WEDNESDAY, MARCH 28
12:00 - 1:00 PM
SLAB SEMINAR ROOM

Title: Hydrocarbon Potential of Penobscot 4-Way Closure
Jan Norbisrath

This talk is a shortened version of the talk our MGG team prepared for participation in the IBA (Imperial Barrel Award) contest. In the IBA, 10 schools try to win over a jury of experienced people from the oil&gas industry with their talks about their analysis of seismic, well and literature data about their given prospect area. Focus hereby is on proposing new well locations. Our prospect area lies offshore Nova Scotia on the Missisauga ridge, just north of Sable Island.
The re-evaluation of the area, which was abandoned after a dry well drilled by Shell in 1977, was done with help of newly acquired 3D seismic data and existing well top and well test data from the 2 old wells (no log data allowed). Additional information came from the literature and from a Play Fairway Analysis conducted by the Canadian "Nova Scotia Department of Energy".


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Title: What can we know from earthquake relocation and tomography?
Qiong Zhang

Earthquake relocation and tomography are two essential techniques that use seismic waves generated by earthquake to obtain high-precision location of earthquake and image the interior of the Earth. Seismic waves velocities vary along the ray path between source and receiver due to variation of rock type and density. My study focus on body wave arrival time inversion, solving for better 1D and/or 3D velocity models in the crust and upper mantle and better earthquake relative locations.
The events from 1986 and to on the Puerto Rico Island (PRI), together with reference 1D model provided by Puerto Rico Seismicity Network have been inverted to generate the minimum 1D model. Using the minimum 1D model, our relocations show strong linear feature along the faults. The relationship between the local seismicity and the faults in the western PRI were poorly understood. According to our relocation, the frequent seismicity at western PRI correlates with serpentinite distribution.
The Coso geothermal field is a world-class geothermal resource in southern California. The interpretation of distribution of magma chamber is not uniform. And the crustal thinning is suggested by gravity and petrology study. We invert for 3D models of Vp and Vp/Vs structure of the crust and upper mantle to associate low velocity anomaly with geological features.


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