Masters Theses
Keywords and Phrases
Blocking Performance; Fracture; Injectivity; Preformed Particle Gel
Abstract
"Preformed particle gels (PPG) have been successfully applied as a plugging agent for plugging fractures and then divert displacing fluid into poorly swept zones. However, PPG propagation and plugging mechanisms through open fractures have not been studied thoroughly.
This work investigated the influence of some factors (particle size, brine concentration, heterogeneity, and brine salinity) on gel injectivity, plugging performance for water flow through open fractures. Five-foot tubes were used to mimic open fractures. Three models were designed to conduct the work, including (1) single fracture with uniform fracture width, (2) single fracture with different widths, and (3) two parallel fractures with different width ratios. Results from single uniform fracture experiments showed that PPG injection pressure was more sensitive to gel strength than gel particle size. When large PPG size and high gel strength were used, high injection pressure and large injection pore volume were required for PPG and brine to reach fracture outlets. Results from single heterogeneous fracture model experiments showed PPG injection pressure increased as the fracture heterogeneity in sections increased. Existence of choke point caused injection pressure to increase accordingly. Furthermore, results showed that injecting lower salinity water, which was less than the brine salinity that was used to prepare PPG, would improve the PPG plugging efficiency for water flow. Parallel fracture models results showed that gel strength and fracture width ratio can effect PPG injection selectivity.
In summary, this work demonstrated a few important impacting elements of gel propagation and water flow for different heterogeneous open fractures situations"--Abstract, page iii.
Advisor(s)
Bai, Baojun
Committee Member(s)
Flori, Ralph E.
Heidari, Peyman
Department(s)
Geosciences and Geological and Petroleum Engineering
Degree Name
M.S. in Petroleum Engineering
Sponsor(s)
United States. Department of Energy
ConocoPhillips (Firm)
Occidental Petroleum Corporation (Oxy)
Daqing Wantong Chemical Plant
Publisher
Missouri University of Science and Technology
Publication Date
Spring 2016
Pagination
xi, 87 pages
Note about bibliography
Includes bibliographical references (pages 83-86).
Rights
© 2016 Ze Wang, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Subject Headings
Enhanced oil recoveryGelationFormation damage (Petroleum engineering) -- Oil fields -- Production methods
Thesis Number
T 10897
Electronic OCLC #
952600521
Recommended Citation
Wang, Ze, "Effect of reservoirs heterogeneity on injection pressure and placement of preformed particle gel for conformance control" (2016). Masters Theses. 7527.
https://scholarsmine.mst.edu/masters_theses/7527