School of Earth and Environment

Ieva Kaminskaite Ieva Kaminskaite

Postgraduate Researcher

Email address: eeika@leeds.ac.uk
Room: 8.154

Affiliation: Institute of Applied Geoscience

Qualifications

BSc in Geology, University of Durham

MSc by Research, University of Leeds (2015) entitled: Impact of Faults on Fluid Flow in Chalk Reservoirs

Teaching Interests

Demonstrating: SOEE 1600, structural geology/maps teaching to Petroleum Engineers

Project details

Project title

Impact of faults on fluid flow in carbonate reservoirs

Supervisors

Professor Quentin Fisher and Dr Carlos Grattoni

Start date

1 November 2015

Project outline

Even though carbonate rocks form majority of the geofluids’ reservoirs (i.e., water, gas and oil), fault sealing in carbonates has been scarcely studied compared to the sealing of faults within siliciclastic reservoirs. The reason of this could be that carbonates are commonly more chemically reactive than siliciclastics, thus they more often lose porosity due to cementation and pressure solution at shallow depth, which makes them more susceptible to dilation and hence formation of conduits to fluid flow rather than barriers. However, there are a number of deformation mechanisms by which faults in carbonates may develop seal potential. For instance, mechanical smearing of sealing lithologies such as evaporates or clays, cementation of faults, dynamic recrystallization and pressure solution, pore collapse or development of low-permeability and high-capillary entry pressure carbonate cataclasites and carbonate-carbonate juxtapositions that appear to be sealing over geological or production time scales. Even though recent studies have mostly examined the outcrop examples of faults in carbonates, extensive list of examples of apparent static and dynamic seal in faulted carbonate reservoirs shows that the occurrence of apparent carbonate fault seal in the subsurface is sufficient to require the development of models and methodologies similar to those developed for predicting fault sealing within siliciclastics. Thus the project aims at compiling more experimental and field-based work in order to better understand the coupling between the many factors that control deformation in carbonate rocks and how different products of deformation affect fluid flow in these reservoirs.