Investigating the use of different types of sealant materials for cement remedial applications

<p>"The overall objective is to investigate the ability of several material to mitigate cement failures such as channels, fractures, and micro-annuli in oil and gas wells. The sealant material that can also be used in the wells that are used for geologic storage of carbon dioxide CO₂. Evaluating the sealant material is critical to improve the zonal isolation of the wells, which would lead to safer operations. The approach of this dissertation is to utilize particles gel that has been used successfully in conformance control application, and epoxy resin systems, that have superior seal characteristics compared to conventional Portland cement. The specific goals are: first, to investigate the sealants that are suitable for the expected wellbore environments and have acceptable viscosity, high bond strength to casing, high injectivity, low permeability, high ductility and high compressive and tensile strength. Secondly, to evaluate the effectiveness of these materials to repair cement's flaws, in the lab, by using cement cores flooding experiments. Two approaches will enable these objectives: 1) performing intensive laboratory measurements to investigate the rheological behavior and mechanical properties of the particles gel and epoxy sealants 2) conducting intensive core flooding experiments to determine sealant material injectivity and determine the seal plugging efficiency to the water and oil leakage from cracked and fractured cements. The outcomes of this study show the epoxy resin sealant develops good bonding strength with the cement but the particles gel does not. The epoxy resin sealant was able to completely prevent oil and water leakages while the particles gel was not able to achieve that"--Abstract, page iv.</p>

Name thesis:degree_name

Ph. D. in Petroleum Engineering

Grantor

Missouri University of Science and Technology

Author dc:creator

• Abdulfarraj, Murad Mohammedahmed

• Petroleum Engineering

Repository record dc:identifier

https://scholarsmine.mst.edu/doctoral_dissertations/2822

OAI identifier oai:identifier

oai:scholarsmine.mst.edu:doctoral_dissertations-3827