Examination of literature on colloidal dispersion gels for oil recovery

Wang, Dongmei; Seright, R.S.

doi:10.1016/j.petsci.2021.07.009

Cited by 20 publications

(10 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The different kinds of cross-linker prompt to divergences in the rheological properties, salt, and temperature resistance. Gels synthesized with metallic cross-linker such as Cr 3+ , Al 3+ or Zr 4+ has inferior stability at high temperature and their small gelation time avoids appropriate placement in deep high temperature reservoirs, however with a delayed gelation mechanism their gelation time can be enhanced and, this kind of cross linkers can be used for deep conformance control treatment, Al crosslinker has low gelation time and is suitable for low temperature but by chelating the aluminum with citrate, its gelation time can be enhanced [28].…”

Section: Gel Formulationsmentioning

confidence: 99%

Application Progress of Insitu Polymer Gel in Oilfield Conformance Control Treatment

Pan,

Kang,

Jiang

et al. 2024

jour

View full text Add to dashboard Cite

Many oilfields around the world are using enhanced oil recovery methods to maximize oil production. Longterm water flooding processes have led to water channeling in mature reservoirs, which is a severe problem in oilfields. Polymer gel is widely used as a plugging agent to reduce water production. Previously, the conventional polymer gel is extensively used for blocking the thief zones, but the performance of conventional polymer gel is not satisfactory in high salinity and high temperature conditions due to rapid syneresis and thermal degradation. The amphiphilic polymer is taking much attention for polymer gel formulation because they are more salt resistant in low concentration compared to high concentration conventional HPAM polymer. In this paper, the crosslinking mechanism of insitu polymer gel is reviewed. The related difficulties and development prospects of polymer gels are presented. It provides a basis for the application of polymer gel in oilfield conformance control treatment. This will help researchers to develop polymer gels to improve oil recovery under economic conditions to meet the requirements of oilfields.

show abstract

Section: Gel Formulationsmentioning

confidence: 99%

Application Progress of Insitu Polymer Gel in Oilfield Conformance Control Treatment

Pan,

Kang,

Jiang

et al. 2024

jour

View full text Add to dashboard Cite

show abstract

“…An elastic plugging agent has outstanding characteristics of being able to “enter, block, and move”, which helps in realizing deep water plugging and profile regulation, increasing the ripple volume, and improving water flooding. It also plays a very important role in water-plugging profiles, such as pre-cross-linked water expansion [ 1 , 2 , 3 ] and colloidal dispersion of gel particles [ 4 , 5 , 6 ], nanospheres [ 7 , 8 , 9 ], etc. However, after the elastic particles absorb water and expand, they can be easily sheared and broken during the formation and migration processes, which affects the plugging strength, especially for large pores with ultra-high permeability and fractured oil reservoirs, which makes it difficult to achieve effective plugging.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Evaluation of a Plugging Agent with an Interpenetrating Polymer Network

Wang

Liu

Huang

et al. 2023

Gels

View full text Add to dashboard Cite

In view of the problems of polymer cross-linked elastic particle plugging agents commonly used in oilfields, including easy shear, poor temperature resistance, and weak plugging strength for large pores, the introduction of particles with certain rigidity and network structure, and cross-linking with a polymer monomer can improve the structural stability, temperature resistance, and plugging effect, and the preparation method is simple and low-cost. An interpenetrating polymer network (IPN) gel was prepared in a stepwise manner. The conditions of IPN synthesis were optimized. The IPN gel micromorphology was analyzed by SEM and the viscoelasticity, temperature resistance, and plugging performance were also evaluated. The optimal polymerization conditions included a temperature of 60 °C, a monomer concentration of 10.0–15.0%, a cross-linker concentration of 1.0–2.0% of monomer content, and a first network concentration of 20%. The IPN showed good fusion degree with no phase separation, which was the prerequisite for the formation of high-strength IPN, whereas particle aggregates reduced the strength. The IPN had better cross-linking strength and structural stability, with a 20–70% increase in the elastic modulus and a 25% increase in temperature resistance. It showed better plugging ability and erosion resistance, with the plugging rate reaching 98.9%. The stability of the plugging pressure after erosion was 3.8 times that of a conventional PAM-gel plugging agent. The IPN plugging agent improved the structural stability, temperature resistance, and plugging effect of the plugging agent. This paper provides a new method for improving the performance of a plugging agent in an oilfield.

show abstract

“…Preformed gels are made up of microsized particles, pH-sensitive cross-linked polymers, swelling polymer grains, and microgels. − In situ gels are mainly made up of polymers, water, and cross-linking agents. − Colloidal dispersion polymer gels (CDGs) are types of in situ gels in which a lower concentration of polymer is used with a cross-linker that can penetrate deeply into the high-permeability zones without damaging the lower permeability oil zones. The CDGs have been criticized in a review by Wang and Seright that they do not propagate deeply into the reservoir and provide resistance factors that are greater than the same polymer without a cross-linker.…”

Section: Introductionmentioning

confidence: 99%

“…22−26 Colloidal dispersion polymer gels (CDGs) are types of in situ gels in which a lower concentration of polymer is used with a cross-linker that can penetrate deeply into the highpermeability zones without damaging the lower permeability oil zones. The CDGs have been criticized in a review by Wang and Seright 27 that they do not propagate deeply into the reservoir and provide resistance factors that are greater than the same polymer without a cross-linker. Sodium and potassium silicate gels and colloidal silica gels (CSGs) have been used for water conformance as early as 1922.…”

Section: Introductionmentioning

confidence: 99%

Emulsified Silica Gel for Deep Reservoir Water Conformance Control

et al. 2023

View full text Add to dashboard Cite

Large volumes of water are produced with the production of oil, posing challenges of corrosion, scaling, and an increased water−oil ratio. Silica-based gels have previously been used as water sealants; however, reservoirs with high temperature and/or salinity cause early gelation, thereby preventing deep penetration into the reservoir. This work discusses factors affecting gel formation from colloidal silica and mixing methods for the preparation of a thermally stable Pickering emulsion and the effect of various parameters on its rheology. Sensitivities include salinities ranging from 5 to 20 wt % for seven different salts, silica gel concentrations from 20 to 28 wt %, pH values from 4 to 9, and temperatures from 80 to 150 °C. The effect of each parameter on the gelation time and gel strength was studied at a constant shear rate and pressure of 100 s −1 and 1100 psi, respectively. A commercial phyllosilicate (organoclay) has been used with diesel to form an invert emulsion of 28% silica gel, with diesel as a continuous phase and colloidal silica as a dispersed phase. Dynamic gel tests were performed to study the effect of the emulsion mixing method, temperature, and organoclay concentrations on the emulsion stability, strength, and viscosity. A lower concentration of salt has a longer gelation time with a lower gel strength. Increasing pH increases the gel strength but reduces the gelation time. The Pickering emulsion formed is stable to high shear, high temperatures, and high salinities. The bulk mixing method produces a direct emulsion, whereas drop-by-drop mixing results in an invert emulsion. A comparison of the gelation time and viscosity has also been provided with non-emulsified silica gel to highlight the benefit of encapsulation in terms of increased gelation time. This work will help academia and industry in designing a cost-effective system for water conformance control in harsh reservoir conditions.

show abstract

Examination of literature on colloidal dispersion gels for oil recovery

Cited by 20 publications

References 75 publications

Application Progress of Insitu Polymer Gel in Oilfield Conformance Control Treatment

Application Progress of Insitu Polymer Gel in Oilfield Conformance Control Treatment

Preparation and Performance Evaluation of a Plugging Agent with an Interpenetrating Polymer Network

Emulsified Silica Gel for Deep Reservoir Water Conformance Control

Contact Info

Product

Resources

About