Project description Acidizing is an established technique to
stimulate enhanced hydrocarbon recovery from carbonate reservoirs. Injection of
acid into carbonate reservoirs entails a series of interactions between the
rock and acid solutions that, at certain conditions, lead to generation of
desired preferential pathways for hydrocarbon, also known as wormholes. These
wormholes serve the role of high conduits of flow, facilitating the production
of hydrocarbon fluids from the porous rock. The process of the effective
wormhole generation and its stability during the production period is a coupled
phenomenon that requires studying the reactive transport and mechanics of the
problem alongside each other. During the generation of wormholes, pore fluid
pressure withstands the overburden pressure. However, excessive lateral growth
of the wormholes and loss of acid solution to rock could generate geomechanical
instability. Under this condition, the wormholes become susceptible to collapse
and undermine the efficiency of wormholes to transfer fluids to the well. In
this line of research, optimizing acid reaction rates, amount, acidity and
level of interaction with rock are key factors in obtaining the desired effects
on the formation at downhole conditions. Sufficient acidization must be
achieved without overtreatment, which could cause the collapse of pore
structures, and may reduce well productivity.
Based on rigorous coupling of geomechanics with
the acidizing two-phase modelling, the project aims at developing a novel
coupled flow-geomechanics code for matrix acidizing. The research will be
crucial for wellbore management and maintenance, and enhanced geothermal
Applicants should have or expect to achieve at least a 2.1 honours degree in Mechanical Engineering, Chemical Engineering, Civil Engineering or Petroleum Engineering.
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