Core–Shell Nanohydrogels with Programmable Swelling for Conformance Control in Porous Media

2020 ◽  
Vol 12 (30) ◽  
pp. 34217-34225
Author(s):  
Liyuan Zhang ◽  
Alireza Abbaspourrad ◽  
Shima Parsa ◽  
Jizhou Tang ◽  
Flavia Cassiola ◽  
...  
Keyword(s):  
Porous Media ◽  
Core Shell ◽  
Conformance Control

scholarly journals Erratum to: Introducing core-shell technology for conformance control

2018 ◽  
Vol 73 ◽  
pp. 75
Author(s):  
Francesca Verga ◽  
Mariangela Lombardi ◽  
Giuseppe Maddinelli ◽  
Laura Montanaro
Keyword(s):  
Core Shell ◽  
Conformance Control

scholarly journals Pore-scale investigation on occurrence characteristics and conformance control mechanisms of emulsion in porous media

2021 ◽  
Vol 48 (6) ◽  
pp. 1430--1439
Author(s):  
Hang SU ◽  
Fujian ZHOU ◽  
Yang LIU ◽  
Yajun GAO ◽  
Baoyang CHENG ◽  
...  
Keyword(s):  
Porous Media ◽  
Control Mechanisms ◽  
Pore Scale ◽  
Conformance Control ◽  
Occurrence Characteristics

Evaluation of In-Situ Generation of Nitrogen Gas for Foam Applications using Two Salt Solutions

2021 ◽  
Author(s):  
Zuhair AlYousef ◽  
Ali Altaq ◽  
Muhammad Almajid ◽  
Lyla Almaskeen
Keyword(s):  
Porous Media ◽  
Apparent Viscosity ◽  
Oil And Gas ◽  
Salt Solutions ◽  
Nitrogen Gas ◽  
Conformance Control ◽  
Foaming Agent ◽  
Foam Generation ◽  
Eor Processes ◽  
Mobility Reduction

Abstract Foams are used in many oil and gas applications including conformance control during EOR processes, fracturing, and acidizing operations. Foams are defined as dispersions of gas bubbles into a continuous liquid phase. Typically, foams are generated when an injection gas such as nitrogen, carbon dioxide, or flue gas is mixed with an injection fluid containing a foaming agent. This method, however, requires a gas source to be present for foams to be generated. The objective of this study is to evaluate a new alternative technique for foam generation using two salt solutions. Nitrogen gas is generated as a result of the reaction of the two salt solutions at specific conditions. This generated nitrogen gas is then used for foam generation in porous media. The foam generated using the two salt solutions is tested in a microfluidic device (rock-on-a-chip) to study the gas mobility reduction in porous media. A Foam rheometer apparatus is also used to measure foam apparent viscosity when the two salt solutions are mixed with a foaming agent. The results are compared with those obtained when nitrogen gas is injected into the system independently in the absence of the two salt solutions. Results reveal that the amount of added salts significantly impact the produced nitrogen volume. Additionally, the test conditions especially the temperature, significantly impacts the reaction rate. The rate of nitrogen gas generation is directly proportional to the temperature when tested at 25-80°C. In addition, experiments demonstrate that the foams generated using the two salt solutions reaction have almost identical characteristics as those produced when nitrogen gas is injected into the foam rheometer apparatus independently. Both methods generate the same foams with comparable foam apparent viscosity. In the microfluidic system, the foam obtained using the two salt solutions in the presence of a foaming agent shows excellent resistance to gas flow and subsequently exhibit large gas mobility reduction. This experimental study, for the first time, confirms the ability of the two salt solutions reaction to generate nitrogen gas spontaneously upon contact under certain conditions. The generated gas is used to generate foams in the presence of a foaming agent. This newly proposed technique of foam generation could significantly impact many oil and gas operations including conformance control during EOR processes, fracturing, and acid stimulation operations.

Rheology and Transport in Porous Media of New Water Shutoff / Conformance Control Microgels

2005 ◽  
Author(s):  
D. Rousseau ◽  
G. Chauveteau ◽  
M. Renard ◽  
R. Tabary ◽  
A. Zaitoun ◽  
...  
Keyword(s):  
Porous Media ◽  
Conformance Control ◽  
Transport In Porous Media ◽  
Water Shutoff

Property Study on Novel Waterflood Conformance Control Gels

2010 ◽  
Vol 146-147 ◽  
pp. 1406-1409 ◽  
Author(s):  
Yin Zhu Ye ◽  
Xing Cai Wu ◽  
Zheng Bo Wang ◽  
Hong Tao Wang
Keyword(s):  
Porous Media ◽  
Chemical Properties ◽  
Water Flooding ◽  
Sweep Efficiency ◽  
Conformance Control ◽  
Laboratory Methods ◽  
Profile Control ◽  
Deep Profile ◽  
And Behavior

In order to improve the sweep efficiency of water flooding in matured oilfield, soft moveable gels (SMG) are developed. The new types of SMG are made of novel, expandable particulate materials. The gels are preformed, stable, size controlled, non-toxic and can reduce water permeability without affecting oil permeability significantly. In this paper, some relevant laboratory methods are carried out for the determination of their main characteristics, including the displacement mechanism, the physio-chemical properties, moblility in porous media and the adjustment of permeability. Furthermore, the properties in bottles and behavior in porous media have also been investigated. The results shows that: 1)the swelling times of SMG are approximately 10, 2)SMG can remarkably improve the efficiency of water flooding, 3)remaining oil startup in low permeability formation, multistage fluid diverting and deep profile control are the main oil displacement mechanisms, 4）the new promising gel system of SMG have extensive application prospects in deep water shutoff and conformance control.

A new model of emulsion flow in porous media for conformance control

Fuel ◽  
2019 ◽  
Vol 241 ◽  
pp. 53-64 ◽  
Author(s):  
Long Yu ◽  
Boxin Ding ◽  
Mingzhe Dong ◽  
Qi Jiang
Keyword(s):  
Porous Media ◽  
Flow In Porous Media ◽  
Conformance Control ◽  
New Model ◽  
Emulsion Flow
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