Doctoral Dissertations


"Recross linkable Preformed Particle Gel (RPPG) is a novel type of preformed particle gel in which particles can bond together to form a strong bulk gel system after being placed in the target formation. In this research, I systematically evaluated the feasibility of using this product to improve gas flooding conformance for mature reservoirs with conduits or fractures. Two RPPG systems were used for the experiment: a CO2- resistant RPPG (CR-RPPG) synthesized using acrylamide (AM) and 2-acrylamide-2- methylpropane sulfonate acid (AMPS), designed for CO2 flooding; and an acrylamide-co-acrylic acid-based RPPG (LT-RPPG), designed for water flooding. Different experimental apparatuses were designed to quantify and visualize the RPPG phase stability under static and dynamic gel-gas interactions. The RPPG phase stability was evaluated under a different range of injection pressures, gas exposure time, and swelling ratio. Also, the RPPG stability was compared to conventional polymer gel systems (HPAM/Cr (III)) that have been applied in oilfields to control gas injection conformance. The results showed that the RPPG systems were stable under both static and dynamic gel-natural gas interactions and were stable when exposed to an acidic environment with an insignificant total percentage weight loss. The core flooding experiment results demonstrated that the RPPGs exhibited excellent plugging performance, which was closely related to the swelling ratio and the fracture aperture. The robustness of the RPPG systems make it a viable candidate for improving gas flooding processes in mature reservoirs dominated by conformance problems such as void space conduits, fractures, and high permeability channels"--Abstract, p. iv


Bai, Baojun
Schuman, Thomas P.

Committee Member(s)

Flori, Ralph E
Dunn-Norman, Shari
Almohsin, Ayman


Geosciences and Geological and Petroleum Engineering

Degree Name

Ph. D. in Petroleum Engineering


Missouri University of Science and Technology

Publication Date

Spring 2023


xvi, 176 pages

Note about bibliography

Includes_bibliographical_references_(pages 172-175)


© 2023 Ali Abdulmohsen Al Brahim, All Rights Reserved

Document Type

Dissertation - Open Access

File Type




Thesis Number

T 12238

Electronic OCLC #