Masters Theses


Haifeng Ding

Keywords and Phrases

Conformance control; Core flooding; Enhanced oil recovery; Gel treatment; Microgel


"Micrometer-size particle gel (microgel) has been developed and successfully applied to improve conformance in mature reservoirs. However, quite few researches have been published to address on their effect on oil recovery and rock permeability modification.

This work conducted a series of core flooding experiments to investigate the injectivity, plugging efficiency and improving oil recovery potentials of a couple of microgels synthesized in our lab.

First, this work studied the impact of permeability and crosslinker concentration on PAM type microgel treatment. Results shows that microgel treatment would have a less plugging efficiency in lower permeability rocks, which could be caused by high injection pressure in lower permeability rocks. However, the oil recovery was higher in lower permeability rocks. The microgel synthesized by lower concentration of crosslinker have bigger particle sizes. Meantime, there would be higher plugging efficiency and better improved oil recovery when crosslinker concentration is lower.

Moreover, this work also studied the effect of permeability and oil saturation on the treatment of a novel type of microgel which can re-crosslink at specific reservoir conditions. Different from PAM microgel, the re-crosslinked microgel would have both better plugging efficiency and oil recovery improvement in lower permeability rocks. Meanwhile, microgel have better transportation ability in the rocks with high oil saturation than those without oil.

Comparing Re-crosslinked microgel to PAM microgel, Re-crosslinked microgel have a better strength and disproportionate permeability reduction effect"--Abstract, page iii.


Bai, Baojun

Committee Member(s)

Wei, Mingzhen
Heidari, Peyman


Geosciences and Geological and Petroleum Engineering

Degree Name

M.S. in Petroleum Engineering


Missouri University of Science and Technology

Publication Date

Fall 2016


xi, 65 pages

Note about bibliography

Includes bibliographical references (pages 62-64).


© 2016 Haifeng Ding

Document Type

Thesis - Open Access

File Type




Subject Headings

Enhanced oil recovery
Oil fields -- Production methods
Surface active agents
Permeability -- Testing
Particle size determination

Thesis Number

T 11020

Electronic OCLC #