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EEWR Brown Bag Seminar wtih Molly Chaney and Sassan Hajirezaie, Graduate Students

Speaker: Molly Chaney and Sassan Hajirezaie, Graduate Students
Series: EEWR Brown Bag Seminars
Location: Engineering Quad E225
Date/Time: Friday, December 7, 2018, 12:00:00 p.m. - 01:00:00 p.m.

Abstract:

Analysis of a Spectrum of Heavy Rainfall Events in the Baltimore Metropolitan Region
Speaker: Molly Chaney, Hydrometeorology Research Group


Molly ChaneyEstimating rainfall rate accurately at fine spatial and temporal resolution is  essential to the prediction and analysis of flash flooding. The Baltimore area has a history of severe urban flooding and has a dense network of rain gauges and stream gauges. The 2012 polarimetric upgrade of the NEXRAD WSR-88D radar network has created opportunities for improving rainfall estimates, especially for extreme, short-duration rainfall. The four events chosen for analysis occurred in 2012, 2014, 2016, and 2018 and span the spectrum of heavy convective rainfall, end members being a tornadic supercell and a weakly convective “warm rain” event. Analyses use polarimetric radar fields at 2-5 minute temporal resolution and sub-kilometer spatial resolution and are compared with rain gauge data. A principal objective of this study is assessing the improvements in estimating extreme rainfall rates using specific differential phase shift measurements.

Reservoir modeling of a Gulf Coast field: History matching and CO2 leakage scenarios
Speaker: Sassan Hajirezaie, Environmental Geochemistry Lab


Sassan HajirezaieDuring my summer internship at the Bureau of Economic Geology in Austin, Texas, we developed a numerical model to study the ongoing CO2-EOR operation in one of the Gulf Coast fields. We modified and enhanced our geologic and fluid models by history matching the model outputs and the data gathered from the field. We then used our tuned  model to perform various simulations including an investigation for a potential CO2 leakage that might have been happening in the field. The  motivation behind this part of the work was the abnormal pressure behavior of a monitoring well in the field, which shows an increase in the bottom hole pressure after the gas injection process starts in the field. We propose that even though fluid migration might be occurring from the EOR zone to the top layers, the migrating fluid is not CO2 gas and is most likely the water swept by the EOR operation towards the monitoring wells.