Novel approach to improve shale stability using super-amphiphobic nanoscale materials in water-based drilling fluids and its field application

Luo, Xiaoming; Jiang, Guancheng; Wang, Guoshuai; Yang, Lili; He, Youwei; Cui, Kaixiao; Yang, Jun

doi:10.1515/rams-2022-0003

Cited by 10 publications

(4 citation statements)

References 43 publications

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“…As shown in Figure b, the micelles of nonionic surfactants have a core composed of hydrophobic hydrocarbon chains and a shell composed of polyoxyethylene chains and water combined with ether bond atoms. In a recent study, super affinity nanoparticles were found to modify shale surface wettability . Compared with nonionic surfactants, the application of anionic surfactants is more extensive.…”

Section: Resultsmentioning

confidence: 99%

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Cleaning Oil-Based Drilling Cuttings with Synthetic Gemini Surfactants

Yan,

Liu,

Hou

et al. 2024

ACS Omega

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The chemical cleaning method is the simplest approach for degreasing oil-based drilling cuttings (ODCs), with the effectiveness of the treatment relying mainly on the selection of the surfactant and the cleaning conditions. However, achieving the standard treatment of ODCs directly using conventional surfactants proves challenging. In light of this, this study introduces a synthesized and purified Gemini surfactant named DCY-1. The structure of DCY-1 was confirmed through Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR) analyses. The characterization in this article encompasses the use of an interface tension meter, nanoparticle size analysis, scanning electron microscopy, and infrared oil measurement. The critical micelle concentration (CMC) of DCY-1 was determined to be 3.37 × 10 −3 mol/L, with a corresponding γ cmc value of 37.97 mN/m. In comparison to conventional surfactants, DCY-1 exhibited a larger micelle size of 4.52 nm, approximately 24.52% larger than that of SDS. Moreover, the residual oil rate of 3.96% achieved by DCY-1 was the lowest among the chemical cleaning experimental results. Through a single-factor experiment, the optimal cleaning ability of DCY-1 for ODCs was determined as follows: a surfactant concentration of 3 mmol/L, a temperature of 60 °C, an ODC/ liquid mass ratio of 1:4, a cleaning duration of 40 min, and a stirring speed of 1000 rad/min. Under these optimal conditions and after merely two cleaning procedures, the residual oil content of ODCs was reduced to 1.64%, accompanied by a smooth and loose surface structure.

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Section: Resultsmentioning

confidence: 99%

“…In a recent study, super affinity nanoparticles were found to modify shale surface wettability. 27 Compared with nonionic surfactants, the application of anionic surfactants is more extensive. This is due to drilling cuttings and sediment particles often having negative charges.…”

Section: Resultsmentioning

confidence: 99%

Cleaning Oil-Based Drilling Cuttings with Synthetic Gemini Surfactants

Yan,

Liu,

Hou

et al. 2024

ACS Omega

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“…A core pressure transmission test was conducted to measure the stable pressure at both the upstream and downstream locations. The rock permeability was then calculated using the Darcy equation, incorporating the experimental data [ 27 , 28 , 29 , 30 , 31 , 32 , 33 ]. For the experimental setup, the upstream pressure was set at 3 MPa, the downstream pressure at 1 MPa, and the confining pressure at 6 MPa.…”

Section: Methodsmentioning

confidence: 99%

Development and Characterization of Thermoresponsive Smart Self-Adaptive Chitosan-Based Polymer for Wellbore Plugging

Wu,

Lou,

et al. 2023

Polymers

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To meet the escalating demand for oil and gas exploration in microporous reservoirs, it has become increasingly crucial to develop high-performance plugging materials. Through free radical grafting polymerization technology, a carboxymethyl chitosan grafted poly (oligoethylene glycol) methyl ether methyl methacrylate acrylic acid copolymer (CCMMA) was successfully synthesized. The resulting CCMMA exhibited thermoresponsive self-assembling behavior. When the temperature was above its lower critical solution temperature (LCST), the nanomicelles began to aggregate, forming mesoporous aggregated structures. Additionally, the electrostatic repulsion of AA chains increased the value of LCST. By precisely adjusting the content of AA, the LCST of CCMMA could be raised from 84.7 to 122.9 °C. The rheology and filtration experiments revealed that when the temperature surpassed the switching point, CCMMA exhibited a noteworthy plugging effect on low-permeability cores. Furthermore, it could be partially released as the temperature decreased, exhibiting temperature-switchable and self-adaptive plugging properties. Meanwhile, CCMMA aggregates retained their reversibility, along with thermal thickening behavior in the pores. However, more detailed experiments and analysis are needed to validate these claims, such as a comprehensive study of the CCMMA copolymer’s physical properties, its interaction with the reservoir environment, and its performance under various conditions. Additionally, further studies are required to optimize its synthesis process and improve its efficiency as a plugging material for oil and gas recovery in microporous reservoirs.

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“…The commonly used nanomaterials in the field of oil/gas exploration and development include SiO 2 , NiO, Fe 3 O 4 , nano-polymer microspheres, etc. Among them, nano SiO 2 is the most widely used due to its excellent performance, good universality, and low comprehensive cost [ 9 , 10 , 11 , 12 , 13 ].…”

Section: Introductionmentioning

confidence: 99%

Study on the Effect of Cations on the Surface Energy of Nano-SiO2 Particles for Oil/Gas Exploration and Development Based on the Density Functional Theory

Ni,

Zhang,

Wang

et al. 2024

Molecules

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Although nano SiO2 exhibits excellent application potential in the field of oil and gas exploration and development, such as drilling fluid, enhanced oil/gas recovery, etc., it is prone to agglomeration and loses its effectiveness due to the action of cations in saline environments of oil and gas reservoirs. Therefore, it is crucial to study the mechanism of the change in energy between nano SiO2 and cations for its industrial application. In this paper, the effect of cations (Na+, K+, Ca2+, and Mg2+) on the surface energy of nano SiO2 particles is investigated from the perspective of molecular motion and electronic change by density functional theory. The results are as follows: Due to the electrostatic interactions, cations can migrate towards the surface of nano SiO2 particles. During the migration process, monovalent cations are almost unaffected by water molecules, and they can be directly adsorbed on the surface by nano SiO2 particles. However, when divalent cations migrate from a distance to the surface of nano SiO2 particles, they can combine with water molecules to create an energy barrier, which can prevent them from moving forward. When divalent cations break through the energy barrier, the electronic kinetic energy between them and nano SiO2 particles changes more strongly, and the electrons carried by them are more likely to break through the edge of the atomic nucleus and undergo charge exchange with nano SiO2 particles. The change in interaction energy is more intense, which can further disrupt the configuration stability of nano SiO2. The interaction energy between cations and nano SiO2 particles mainly comes from electrostatic energy, followed by Van der Waals energy. From the degree of influence of four cations on nano SiO2 particles, the order from small to large is as follows: K+ < Na+ < Mg2+ < Ca2+. The research results can provide a theoretical understanding of the interaction between nano SiO2 particles and cations during the application of nano SiO2 in the field of oil and gas exploration and development.

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Novel approach to improve shale stability using super-amphiphobic nanoscale materials in water-based drilling fluids and its field application

Cited by 10 publications

References 43 publications

Cleaning Oil-Based Drilling Cuttings with Synthetic Gemini Surfactants

Cleaning Oil-Based Drilling Cuttings with Synthetic Gemini Surfactants

Development and Characterization of Thermoresponsive Smart Self-Adaptive Chitosan-Based Polymer for Wellbore Plugging

Study on the Effect of Cations on the Surface Energy of Nano-SiO2 Particles for Oil/Gas Exploration and Development Based on the Density Functional Theory

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