Preparation of Multifunctional Surfactants Derived from Sodium Dodecylbenzene Sulfonate and Their Use in Oil-Field Chemistry

Li, Yongfei; Bai, Quanzheng; Li, Qiang; Huang, Hai; Ni, Weijun; Qian, Wang; Xin, Xin; Zhao, Bin; Chen, Gang

doi:10.3390/molecules28083640

Cited by 18 publications

(12 citation statements)

References 27 publications

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“…In addition, the SO bond gives the surfactant molecule surface properties and water miscibility properties. Due to this bond, surfactants can be hydrophilic and hydrophobic at the same time …”

Section: Resultsmentioning

confidence: 99%

Modifying the Wettability of Carbonate Gas Condensate Reservoirs Rocks toward Gasophilic for Condensate Blockage Removal and Enhanced Hydrocarbon Recovery Using a Synthesized Anionic Fluorinated Surfactant

2023

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Chemical treatment is used to remove gas condensate blockage near the wellbore of reservoirs. In this regard, a fluorinated surfactant (F-surfactant) with anionic charge was prepared, characterized, and tested as a wettability-modifying agent for the treatment of carbonate rock in laboratory quantities. To measure this application, related tests including surface tension, contact angle, imbibition, adsorption, and salt resistance were performed. In addition to the successful synthesis, the results show that the temperature degradation of the F-surfactant does not happen easily, and it maintains its structure at the reservoir temperature. The concentration of 525 ppm was determined as the critical micelle concentration (CMC). The F-surfactant effectively reduced the surface tension of the condensate/hydrocarbon gas system. Thus, the surface tension values in concentrations of 125, 225, 325, 425, 525, 625, and 725 ppm were 21.36, 15.843, 10.89, 4.47, 2.936, 2.617, and 2.382 mN/m, respectively. Reducing the surface tension in the condensate/hydrocarbon gas system strengthens an effective mechanism for the production of condensate from the area around the well called the “positive coupling effect”. The wettability of carbonate rock altered to gasophilicity at low concentrations and the average contact angle at concentrations of 425, 525, and 625 ppm increased to 117.10, 121.11, and 127.32°, respectively, after the completion of the aging time. The synthesized F-surfactant has significant adsorption based on the decrease in concentration per injected pore volume (PV) in the carbonate plug. In this way, the adsorption percentage per 2 PV was equal to 12.28%. Mediators and adsorption mechanisms in this case are related to rock and F-surfactant molecules interactions. Based on turbidity measurement, the F-surfactant solutions are compatible with up to 80,000 ppm salinity.

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Section: Resultsmentioning

confidence: 99%

Modifying the Wettability of Carbonate Gas Condensate Reservoirs Rocks toward Gasophilic for Condensate Blockage Removal and Enhanced Hydrocarbon Recovery Using a Synthesized Anionic Fluorinated Surfactant

2023

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“…Organic cleaning agents have an excellent performance in emulsification and cleaning. Their working mechanism is to use the chelating ability of their active groups to emulsify and dissolve the oil droplets and carry them to the eluent to achieve the purpose of oil and mud separation . It is worth noting that the oil content of the residue after cleaning with the biosurfactant rhamnolipid is close to 4% and the cleaning effect is not good.…”

Section: Resultsmentioning

confidence: 99%

“…Their working mechanism is to use the chelating ability of their active groups to emulsify and dissolve the oil droplets and carry them to the eluent to achieve the purpose of oil and mud separation. 27 It is worth noting that the oil content of the residue after cleaning with the biosurfactant rhamnolipid is close to 4% and the cleaning effect is not good. Biosurfactants are commonly used as thermal cleaning agents, are nontoxic to the environment, and have a better cleaning effect.…”

Section: Selection Of Cleaning Agentsmentioning

confidence: 99%

Analysis of the Changes in the Components of the Chemical Hot Washing Treatment of Oily Sludge and the Mechanism of Oil Removal

Yan,

Tong,

et al. 2023

Ind. Eng. Chem. Res.

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Oily sludge is both a hazardous waste and a resource that contains significant amounts of recoverable mineral oil, while the recovery and reduction of mineral oil are the main methods of reducing the hazardous characteristics of oily sludge. In this study, chemical hot washing was used to treat oily sludge from an oilfield in Xinjiang, China, and the optimum detergent formulation and optimal process parameters were obtained through chemical compounding and process parameter optimization. The mechanism of oil removal was explored through a variety of different components of crude oil. The results show that the compound detergent AXQ (sodium phosphate/ sodium carbonate = 4:6) can reduce the oil content of oily sludge from 20.13 to 1.55% at a dosing rate of 1.5%, 70 °C, a solid−liquid ratio of 1:5, a stirring rate of 400 rpm, a stirring time of 20 min, a pH value of 9, a centrifugal speed of 3000 rpm, a centrifugal time of 10 min, and an oil removal rate of 92.30%, meeting the DB 65/T 3998-2017 treatment standard. Chemical thermal washing removed most of the mineral oil, with 93.47, 95.38, 63.35, and 79.47% removal of the four components, respectively, and gas chromatography analysis indicated that most of the low carbon number petroleum hydrocarbons prior to n-heptadecane were removed. Analysis of the different crude oil components after hot washing shows that the alkaline inorganic salts destroy the stable emulsion system formed by naturally occurring interfacially active substances like asphaltene and resin through electrical neutralization, achieving a three-phase separation of oil, water, and solids and laying the foundation for mineral oil removal.

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“…Therefore, shale reservoir development has become a hot situation, and oil-based drilling fluids have received more attention than before. However, oil-based drilling fluids also have problems, the most prominent of which is that the wettability of solid surfaces such as drilling cuttings and formations changes from water-wet to oil-wet, resulting in difficulties in mud cake removal during completion [ 20 ], low cement bonding strength during cementing [ 21 ], formation blockage by emulsion, and the difficult disposal of oily drilling cuttings and drilling waste (2 × 10 6 tons/year) [ 22 , 23 , 24 , 25 , 26 ]. It seriously restricts its further expansion in application.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Properties of Reversible Emulsion Drilling Fluid Stabilized by Modified Nanocrystalline Cellulose

Liu,

Li,

Wang

et al. 2024

Molecules

Self Cite

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Reversible emulsion drilling fluids can concentrate the advantages of water-based drilling fluids and oil-based drilling fluids. Most of the existing reversible emulsion drilling fluid systems are surfactant-based emulsifier systems, which have the disadvantage of poor stability. However, the use of modified nanoparticles as emulsifiers can significantly enhance the stability of reversible emulsion drilling fluids, but ordinary nanoparticles have the disadvantages of high cost and easily causing environmental pollution. In order to solve the shortcomings of the existing reversible emulsion drilling fluid system, the modified nanocrystalline cellulose was considered to be used as an emulsifier to prepare reversible emulsion drilling fluid. After research, the modified nanocrystalline cellulose NWX-3 can be used to prepare reversible emulsions, and on this basis, reversible emulsion drilling fluids can be constructed. Compared with the reversible emulsion drilling fluid stabilized by HRW-DMOB (1.3 vol.% emulsifier), the reversible emulsion drilling fluid stabilized by the emulsifier NWX-3 maintained a good reversible phase performance, filter cake removal, and oily drill cuttings treatment performance with less reuse of emulsifier (0.8 vol.%). In terms of temperature resistance (150 °C) and stability (1000 V < W/O emulsion demulsification voltage), it is significantly better than that of the surfactant system (temperature resistance 120 °C, 600 V < W/O emulsion demulsification voltage < 650 V). The damage of reservoir permeability of different types of drilling fluids was compared by physical simulation, and the damage order of core gas permeability was clarified: water-based drilling fluid > reversible emulsion drilling fluid > oil-based drilling fluid. Furthermore, the NMR states of different types of drilling fluids were compared as working fluids, and the main cause of core permeability damage was the retention of intrusive fluids in the core.

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Preparation of Multifunctional Surfactants Derived from Sodium Dodecylbenzene Sulfonate and Their Use in Oil-Field Chemistry

Cited by 18 publications

References 27 publications

Modifying the Wettability of Carbonate Gas Condensate Reservoirs Rocks toward Gasophilic for Condensate Blockage Removal and Enhanced Hydrocarbon Recovery Using a Synthesized Anionic Fluorinated Surfactant

Modifying the Wettability of Carbonate Gas Condensate Reservoirs Rocks toward Gasophilic for Condensate Blockage Removal and Enhanced Hydrocarbon Recovery Using a Synthesized Anionic Fluorinated Surfactant

Analysis of the Changes in the Components of the Chemical Hot Washing Treatment of Oily Sludge and the Mechanism of Oil Removal

Preparation and Properties of Reversible Emulsion Drilling Fluid Stabilized by Modified Nanocrystalline Cellulose

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