Keywords and Phrases
"Re-crosslinkable preformed particle gel (RPPG) is a newly developed preformed particle gel for improving sweep efficiency and oil recovery by blocking or reducing the conductivity of fractures and fracture-like channels or conduits. However, RPPG has the potential to plug the facilities or damage the formation if a treatment is not properly conducted.
This work presents the performance of selected oxidizing breakers on the degradation of RPPG. The influence of a few factors on the degradation process was investigated, including breaker type, breaker concentration, temperature, gel concentration, gel aging time, and gel size. Results indicate that breaker type, concentration, and temperature have the most significant effects on RPPG degradation. Na2S2O8 activated by NaOH provided the best degradation performance on RPPG compared with other breakers. RPPG degradation degree increased with breaker concentration and temperature. More generally, lowering the RPPG concentration can result in a better degradation degree. Moreover, the aging time of RPPG had negligible effect on the degradation of RPPG.
Besides the static evaluations of RPPG degradation, several core flooding tests were carried out to analyze the RPPG damage remediation by breakers. The results show that breakers could result in the restoration of the cores' permeability. The lower RPPG injection pressure resulted in a better permeability restoration, and low permeability cores can also result in a better permeability restoration compared higher permeability cores"--Abstract, page iii.
Geosciences and Geological and Petroleum Engineering
M.S. in Petroleum Engineering
Missouri University of Science and Technology
xii, 76 pages
© 2019 Enze Zhou, All rights reserved.
Thesis - Open Access
Electronic OCLC #
Zhou, Enze, "Breaker evaluation and formation damage remediation of re-crosslinkable preformed particle gel (RPPG)" (2019). Masters Theses. 7901.