Nehemiah Dominick
Visiting PhD Student
Nehemiah Dominick was a PhD student at the University of Western Cape, in Cape Town, South Africa. He is an enthusiastic and self-driven petroleum geoscientist. Nehemiah has extensive capabilities in reservoir modeling, seismic interpretation, reservoir characterization, petrophysical analysis.
Nehemiah visited PetroLab as part of an exchange fellowship allowing distinguished PhD student to visit a peer laboratory for a year. Nehemiah graduated from the University of Western Cape in December 2023 following a research mentored by Dr. Mimonitu Opuwari. He is currently a visiting scientist in Total (France).
Nehemiah is a globe trotter, who enjoys sports and travels.
Research
Sandstone reservoirs from the central Bredasdorp Basin, offshore South Africa
The primary purpose of this study is the use of core data to produce a conceptual geological flow zonation scheme that will be combined with production data for a flow scheme for the gas bearing sandstone reservoirs in the Bredasdorp Basin offshore South Africa. The workflow presented here follows through from establishing a geological framework that allows for the definition of facies to the evaluation of three unique rock type classification methods. The integration of the methods with fluid saturation results was successful for the identification of speed zones due to the close agreement observed. The results revealed eight speed zones, classified as high, moderate, low and very low- speed zones. The high-speed zones are comparable to facies A, and the very low- speed zone to facies C and D. One high, two moderate, four low, and one very low- speed zones were identified, with high-speed zone belonging to well PA1. Facies C provides sand-sand contacts allowing the transfer of flow between the moderate zones. The flow unit speed plays a significant role in the segregation of high speed from moderate speed zones. The high and moderate zones show average permeability values greater than 190mD, associated with medium to coarse grain sandstone. Conversely, the very low- speed zone is fine-grained sandstone with low permeabilities (<5mD). The gas column is within the low to high speed zones. A low- speed zone of the same feature identified in well PA2 and PA3 will be investigated further to know the lateral extend.