Bulk gels for permeability reduction in fractured and matrix reservoirs

Gussenov, Iskander; Nuraje, Nurxat; Kudaibergenov, Sarkyt E.

doi:10.1016/j.egyr.2019.06.012

Cited by 32 publications

(20 citation statements)

References 96 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…6 Various types of materials have been used to plug high-permeability thief zones. 7 Cement and sodium silicate are the most commonly used ones for water control 8,9 ; however, these slurries may not be able to penetrate effectively into the small leaks, 6 and they would block nonselectively both of water and oil paths. Thus, the concepts "relative permeability modification (RPM)" 10 and "disproportionate permeability reduction (DPR)" 11 were proposed successively.…”

Section: Introductionmentioning

confidence: 99%

“…To date, various hydrogels, bulk, and micro-or nano-gels or colloidal dispersion gels, in-situ crosslinked and preformed particulate gels, generally formed by crosslinking PAM derivatives with either inorganic or organo-metallic crosslinkers have been reported to be used in profile control and water shutoff. 2,7,15 While gels are able to be extruded into very narrow channels, they usually rupture very easily in wider channels. In addition, all the gels will be dehydrated and experience synesis in the high-temperature and highsalinity bottomhole environment.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Hydrophobically modified melamine‐formaldehyde sponge used for conformance control and water shutoff during oil production

Luo

Feng

2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polymer or polymer gels have been widely used to control excessive water during oil production by homogenizing injection profile and reducing water cut in the produced fluids. However, the gels used are generally unable to selectively minimize water production, and face the challenge of syneresis of gels under high temperature and high salinity environment. In this work, melamineformaldehyde sponge was modified with AlCl 3 solution, rendering a transition from hydrophilic to hydrophobic state with a water contact angle of 130 on the surface of the modified product. Filtration results show that mineral oil and water can be selectively separated with the hydrophobically modified sponge powders. Simulated water shutoff experiments demonstrated the blockage efficiency against water was 30% higher than that against oil, and the oil production was increased 7.4% after blocking. The parallel profile control tests confirmed that the fraction flow of high permeable channel decreased about 75%, accompanied with 60% rise of oil recovery factor. These results indicated that such hydrophobic materials can significantly reduce excessive water production, and this work provided a new idea to offer a low-cost hydrophobic material for conformance control and water shutoff during oil production.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hydrophobically modified melamine‐formaldehyde sponge used for conformance control and water shutoff during oil production

Luo

Feng

2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…5,6 In recent years, more and more attentions have been paid to the study of efficient plugging materials as the continuous development of drilling plugging technology of underground gas drainage in coal mines. [7][8][9][10] Polyvinyl alcohol (PVA) is widely used in the fields of biomedicine, 11,12 art cleaning, 13 food packaging 14 and plugging materials, 15 because of its advantages of good water solubility, oil and solvent resistance, low price, and excellent gas barrier properties. [16][17][18] In previous studies, many researchers focused on the preparation of gel plugging materials through PVA.…”

Section: Introductionmentioning

confidence: 99%

Study on the mechanism and performance of polymer gels byTEandPVAchemical cross‐linking

Zhou

Chu

Fan

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polymer gels are widely used as drilling plugging materials. In this paper, titanium bis(triethanolamine)diisopropoxide (TE) and polyvinyl alcohol (PVA) solution were chemically cross-linked to obtain a gel material. It shows that the OH on the PVA molecular chain are chemically cross-linked with the Ti ion in TE crosslinking agent through complexation reaction, and the crosslinked segment can inhibit the chain motion, resulting in a stable "crab structure" gel configuration. The gel materials synthesized under this configuration were characterized and analyzed by SEM, TG-DSC, GPC, and contact angle measurement. It was demonstrated that the gel performance is optimal when the concentration of TE crosslinking agent is 2.2 wt%, considering the gel strength and gelation time. In addition, the simulated plugging experiment of the gel showed that the service life of the gel was about 72 days, and the sealing performance and tensile recovery performance were significantly improved compared with the previous ones, which would provide a new perspective for the novel plugging materials.

show abstract

“…In order to overcome these problems, we suggest to use as viscosifying agent (or water thickeners) the tailor made amphoteric terpolymers AAm-AMPS-APTAC that possess the thermal stability and are able to swell and increase the viscosity in saline water due to specific, so called "antipolyelectrolyte" effect [17,18]. Previous studies [19][20][21] indicated that many polymers containing AAm and ionic monomers can be used for EOR process [22][23][24][25][26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Salt tolerant acrylamide-based quenched polyampholytes for polymer flooding

Mukhametgazy¹,

Gussenov²,

Shakhvorostov³

et al. 2020

Bull. of the Kar. Univ. "Chem". Ser.

View full text Add to dashboard Cite

In our previous papers [1, 2] we considered the behavior of linear and crosslinked polyampholytes based on fully charged anionic monomer — 2-acrylamido-2-methyl-1-propanesulfonic acid sodium salt (AMPS) and cationic monomer — (3-acrylamidopropyl)trimethylammonium chloride (APTAC) in aqueous-salt solutions, swelling and mechanical properties. In the present paper we report the applicability of salt tolerant amphoter-ic terpolymers composed of AMPS, APTAC and acrylamide (AAm) in enhanced oil recovery (EOR). The amphoteric terpolymers of different compositions, particularly [AAm]:[AMPS]:[APTAC] = 50:25:25; 60:20:20; 70:15:15; 80:10:10 and 90:5:5 mol.% were prepared by free-radical polymerization, identified and their viscosifying ability with respect to reservoir saline water (salinity is 163 g⋅L-1) at 60 °C was tested. It was found that due to polyampholytic nature, the AAm-AMPS-APTAC terpolymers exhibited improved viscosifying behavior at high salinity water. As a result, the appropriate salt tolerant sample [AAm]:[AMPS]:[APTAC] = 80:10:10 mol.% was selected for polymer flooding experiments. Polymer flood-ing experiments on high permeable sand pack model demonstrated that only 0.5 % oil was recovered by am-photeric terpolymer. While injection of polyampholyte solution into preliminarily water flooded core sample resulted in the increase of oil recovery up to 4.8–5 %. These results show that under certain conditions the amphoteric terpolymers have a decent oil displacement ability.

show abstract

Bulk gels for permeability reduction in fractured and matrix reservoirs

Cited by 32 publications

References 96 publications

Hydrophobically modified melamine‐formaldehyde sponge used for conformance control and water shutoff during oil production

Hydrophobically modified melamine‐formaldehyde sponge used for conformance control and water shutoff during oil production

Study on the mechanism and performance of polymer gels byTEandPVAchemical cross‐linking

Salt tolerant acrylamide-based quenched polyampholytes for polymer flooding

Contact Info

Product

Resources

About