A review on shale oil and gas characteristics and molecular dynamics simulation for the fluid behavior in shale pore

Sun, Shuo; Liang, Shuang; Liu, Yikun; Liú, Dan; Gao, Mingyu; Tian, Yang; Wang, Jingkun

doi:10.1016/j.molliq.2023.121507

Cited by 48 publications

(13 citation statements)

References 268 publications

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“…The density of the water phase was 1000 kg/m 3 ± 2.0, and the thickness of the crude oil was 848 kg/m 3 ± 2.0. It was consistent with the theoretical data of 998 and 850 kg/m 3 (refs and , respectively) at 298 K. Both the method of modeling and the setting of simulation parameters were reasonable in this study through the above results. The interface action and aggregation of surfactants at the crude oil–water interface could be accurately reflected.…”

Section: Resultssupporting

confidence: 90%

Study on the Behavior of Saturated Cardanol-Based Surfactants at the Crude Oil/Water Interface through Molecular Dynamics Simulations

Lu,

Liu,

Yuan

et al. 2023

J. Phys. Chem. B

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Cardanol is a green biosurfactant with broad application prospects, which is expected to be used to enhance oil recovery (EOR). This paper designed two types of surfactants (extended and nonextended), including six kinds of nonionic and anion–nonionic surfactants. The position changes of PO and EO chains and the effects of different hydrophilic groups on the interface properties were studied with molecular dynamics simulations by constructing a model of crude oil (containing four components) and water molecules. The results of interfacial tension and solvent-accessible surface area showed that the interfacial properties of sulfate were better than those of sulfonates and nonionic surfactants. Meanwhile, the interface properties of nonextended surfactants were better than those of extended surfactants. The gyration radius (R g) and tilt angle data demonstrated that when EO chains were located between hydrophobic groups and PO chains (nonextended surfactants), the adsorption capacity of surfactants at crude oil and water interfaces could be effectively improved. The radial distribution function of the hydrophilic group and hydrophobic group of surfactants with water molecules and four components of the crude oil molecule, respectively, explained that surfactants (8EO8POSO4) had better emulsification performance when the intermolecular interactions between crude oil and water two phases were relatively balanced. This study provides a theoretical reference for the design of oil-displacement surfactants and the mechanism analysis of emulsification properties.

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Section: Resultssupporting

confidence: 90%

Study on the Behavior of Saturated Cardanol-Based Surfactants at the Crude Oil/Water Interface through Molecular Dynamics Simulations

Lu,

Liu,

Yuan

et al. 2023

J. Phys. Chem. B

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“…5 As an unconventional oil and gas resource with high heat production efficiency, low pollution and large world reserves, the development of shale gas can dramatically change the world's energy landscape. 6,7 China has the world's largest shale gas reserves, but the development of shale gas faces great challenges due to complex geological conditions and burial depth. 8,9 Shale is a low-permeability rock with nanometer-sized pores and contains a certain amount of clay minerals as well as other minerals such as montmorillonite and calcite.…”

Section: Introductionmentioning

confidence: 99%

Terminal amine‐based hyperbranched polymer‐modified metal oxide particles for improving the stability of water‐based drilling fluids in interaction with shales

Zheng,

Zhou,

Chen

et al. 2024

J of Applied Polymer Sci

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When oil and gas extraction is drilled into water‐sensitive shale formations, water intrusion leads to hydration expansion and dispersion of shale clay minerals, which in turn leads to well wall instability. Two nanomaterials, PET and PEF, were synthesized using Hyperbranched polyethyleneimine (HPEI) as shell‐coated metal oxide nanoparticles (MONPs), and the nanomaterials were characterized in terms of molecular structure, thermal stability, and particle size distribution. The blocking and inhibition properties of PET and PEF were tested and investigated by analytical methods such as linear swelling experiments, shale rock chip rolling recovery experiments, and American Petroleum Institute (API) filtration loss experiments, the effects of PET and PEF on the rheology and filter loss reduction of water‐based drilling fuilds (WBDFs) were also investigated. PET and PEF have good blocking and inhibition properties, which somewhat ameliorate the effect of NPs on the rheology of WBDFs, while significantly improving the stability of shale in WBDFs.

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“…Singh et al 26 reviewed the laboratory and field observations in water uptake by shale and discussed the inner mechanisms. Sun et al 27 provided a review of shale oil and gas transport characteristics on the nanoscale. Shaibu and Guo 28 summarized the water soaking studies of a shale well after hydraulic fracturing.…”

Section: Introductionmentioning

confidence: 99%

Imbibition Mechanisms of Fracturing Fluid in Shale Oil Formation: A Review from the Multiscale Perspective

et al. 2023

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The breakthrough of shale oil in North America led to a worldwide energy revolution. Shale reservoirs show multiscale properties and a large proportion of nanopores compared to conventional reservoirs, which makes the imbibition mechanisms of fracturing fluids within shale reservoirs exceptionally complicated. For instance, the fracturing fluid shows a distinct imbibition behavior at different scales. Traditional models face significant challenges in imbibition characterization. Understanding the imbibition mechanisms in shale oil formations from a multiscale perspective can help to make full use of the positive effect and enhance oil recovery. We review imbibition mechanisms in shale reservoirs from the nanoscale to the reservoir scale. The imbibition principles in a single nanopore and the improvement of the traditional characterization models are clarified. Then, at the pore scale, we elaborate on the imbibition laws obtained from the microfluidic chip, pore network model, and direct simulations. We also outline the imbibition dynamics at the core scale, the influences of capillary forces and osmotic pressure, and the variations of the pore structure. Finally, the imbibition behavior at the reservoir scale and field examples considering the imbibition effect are introduced. We analyze the existing problems on each scale and discuss the future trends in this area. This work is expected to help readers systematically understand the mechanisms and behavior of fracturing fluid imbibition in shale oil reservoirs at different scales and accelerate the exploitation of shale resources.

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A review on shale oil and gas characteristics and molecular dynamics simulation for the fluid behavior in shale pore

Cited by 48 publications

References 268 publications

Study on the Behavior of Saturated Cardanol-Based Surfactants at the Crude Oil/Water Interface through Molecular Dynamics Simulations

Study on the Behavior of Saturated Cardanol-Based Surfactants at the Crude Oil/Water Interface through Molecular Dynamics Simulations

Terminal amine‐based hyperbranched polymer‐modified metal oxide particles for improving the stability of water‐based drilling fluids in interaction with shales

Imbibition Mechanisms of Fracturing Fluid in Shale Oil Formation: A Review from the Multiscale Perspective

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