Study on rheology and microstructure of phenolic resin cross-linked nonionic polyacrylamide (NPAM) gel for profile control and water shutoff treatments

Cheng-lin, GU; Lv, Yahui; Fan, Xiaomeng; Zhao, Changxi; Dai, Caili; Zhao, Guang

doi:10.1016/j.petrol.2018.06.016

Cited by 57 publications

(26 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This phenomenon makes the effect of alkali on gelation performance of the gel system in high temperature, not noticeable compared with the effect of acid. Gu et al also reported that the strength and stability of the phenolic resin cross‐linked gel under acidic condition were not promising . The addition of acid caused the negatively charged polymer molecules on polymer backbone to be electrically shielded.…”

Section: Factors That Affect Gelation Kineticsmentioning

confidence: 99%

“…Moreover, the formed membrane structure is very fragile, and the spherical particles were deteriorated to form a type of filamentous structure. It will affect the gel system to be dehydrated easily . The study of the change in pH of polymer gelant with time also was carried out, which concluded that the pH of the gelant decreased with time.…”

Section: Factors That Affect Gelation Kineticsmentioning

confidence: 99%

“…The similar observation also has been recorded with the gel studied by Al-Muntasheri et al 63 not promising. 92 The addition of acid caused the negatively charged polymer molecules on polymer backbone to be electrically shielded.…”

Section: Effect Of Temperaturementioning

confidence: 99%

“…It will affect the gel system to be dehydrated easily. 92 The study of the change in pH of polymer gelant with time also was carried out, which concluded that the pH of the gelant decreased with time.…”

Section: Effect Of Temperaturementioning

confidence: 99%

See 3 more Smart Citations

In situ organically cross‐linked polymer gel for high‐temperature reservoir conformance control: A review

Amir

Said

Jan

2018

Polymers for Advanced Techs

View full text Add to dashboard Cite

Polymer gel has been established as water‐blocking agents in oil recovery application. In this practice, a mixture known as gelant is injected into target area and set into a semisolid gel after a certain adequate time. Besides profile modification and water shutoff, the role of the polymer gel in conformance control is to block high permeability regions, before diverting injected water from high permeability to low permeability zones of the reservoir. It is to boost the oil displacement and sweep efficiency. This is the key to improve oil recovery in the heterogeneous oil reservoirs. However, very limited gels are applicable for harsh conditions, especially in high‐temperature reservoirs. Organically cross‐linked polymer is 1 of the materials for conformance control at high‐temperature reservoirs. Many experimental works and field applications have exhibited the potential of this technology. This paper presents a concise review on this polymer gel for conformance control at high‐temperature wells. Firstly, in situ organically cross‐linked polymer gel has been introduced, and the reason of the use over other types of polymer gels is summarized. The early studies of organically cross‐linked gel systems are also discussed, followed by the chemistry and the gelation mechanisms. An extensive review on factors that affect gelation kinetics and field applications is also discussed in some detail.

show abstract

Section: Factors That Affect Gelation Kineticsmentioning

confidence: 99%

Section: Factors That Affect Gelation Kineticsmentioning

confidence: 99%

Section: Effect Of Temperaturementioning

confidence: 99%

Section: Effect Of Temperaturementioning

confidence: 99%

See 2 more Smart Citations

In situ organically cross‐linked polymer gel for high‐temperature reservoir conformance control: A review

Amir

Said

Jan

2018

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…Fortunately, the gel systems prepared with nonionic polyacrylamide (NPAM) were studied. The low initial viscosity before crosslinking and good shearing resistance of NPAM-based gels showed the potential application for indepth water control in mature reservoirs [25,26].…”

Section: Introductionmentioning

confidence: 99%

The Thermal Gelation Behavior and Performance Evaluation of High Molecular Weight Nonionic Polyacrylamide and Polyethyleneimine Mixtures for Indepth Water Control in Mature Oilfields

Qin¹,

Liao²,

Luo³

et al. 2020

Preprint

View full text Add to dashboard Cite

A delayed crosslinked polymer gel was developed for indepth water control in mature oilfields. The thermal gelation behavior of nonionic polyacrylamide (NPAM) and PEI was investigated, and sodium citrate (NaCit) was selected as a new retarder to prolong the gelation time. The gelation performance of NPAM/PEI gel system can be adjusted by the variation of NPAM or PEI concentration, and a quadratic model was developed by statistical analysis, which predict the gelation time of NPAM/PEI gel system. The obtained model showed high significance and good reliability as suggested by the F-ratio of 175.16 and high adjusted R-square value (0.9732). The decrease of the initial pH value of gelling solution leads to the weaker gel viscosity and longer gelation time due to the protonation of amine groups on the PEI chains. Increasing temperature resulted in higher gel viscosity but shorter gelation time. The addition of NaCit showed a good delayed gelation effect on the NPAM/PEI gel system, and the gel system in the presence of NaCit exhibited a good compatibility with injected and formation water. A dense three-dimensional structure was observed in matured NPAM/PEI/NaCit gel, and it could keep stable below 150℃. The gel system could effectively reduce the permeability (>95%) and restricted the flow of water after matured in natural cores.

show abstract

Intelligent sustained‐release microgel for reduced permeability of fluid channels: Synthesis and properties

Song

Cai

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polymer microspheres as fluid diverting agents have been applied for profile control in deep reservoirs. However, its reservoir adaptability strictly requires the matching between the particle size and the pore radius, which are hard to realize due to uncertainty of pore radius caused by long-term water flooding. That behavior has severely reduced their plugging performance to the large channel. The objective of this study was to prepare a kind of intelligent sustained-release microgel to solve the problem, which could slowly release of sodium silicate during migration, form the larger aggregates and plug high permeability reaching deep reservoir. We developed a novel blocking agent, which is an amphoteric microgel (OICMS) synthesized by light-initiated polymerization followed by the adsorption of a sodium silicate solution. The microgel properties, including the adsorption and release properties of a sodium silicate solution, and its influencing factors were investigated. The results showed that the OICMS had larger adsorption and release ratio of sodium silicate than conventional polymer microspheres, influenced by the ionic degree, molecular weight, amount of pore-forming agent, and cross-linking density.

show abstract

Study on rheology and microstructure of phenolic resin cross-linked nonionic polyacrylamide (NPAM) gel for profile control and water shutoff treatments

Cited by 57 publications

References 13 publications

In situ organically cross‐linked polymer gel for high‐temperature reservoir conformance control: A review

In situ organically cross‐linked polymer gel for high‐temperature reservoir conformance control: A review

The Thermal Gelation Behavior and Performance Evaluation of High Molecular Weight Nonionic Polyacrylamide and Polyethyleneimine Mixtures for Indepth Water Control in Mature Oilfields

Intelligent sustained‐release microgel for reduced permeability of fluid channels: Synthesis and properties

Contact Info

Product

Resources

About