4.7 Article

Promotion and inhibition effects of wax on methane hydrate formation and dissociation in water-in-oil emulsions

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Energy & Fuels

Impact of lighter alkanes on the formation and dissociation kinetics of methane hydrate in oil-in-water dispersions relevant for flow assurance

Siddhant Kumar Prasad et al.

Summary: This study investigated the impact of chain length of saturated hydrocarbons on methane hydrate formation and dissociation kinetics in oil-in-water dispersions. Sodium dodecyl sulfate was used as a surfactant to simulate natural surfactants. The results showed that an appropriate concentration of SDS enhanced the hydrate formation during initial stages, but higher concentrations disrupted the structure of local water. With a fixed SDS concentration, higher carbon chain length accelerated the hydrate formation during initial stages before reaching similar formation kinetics. Higher concentrations and higher alkane content delayed the gas release during dissociation.
Article Energy & Fuels

Pore-scale investigation on methane hydrate formation and plugging under gas-water flow conditions in a micromodel

Jianbo Zhang et al.

Summary: This study investigates the formation and plugging of methane hydrate in porous media under gas-water flow conditions using a visible heterogeneous micromodel. The results show that hydrates tend to deposit in situ in the pores, and the intersection of different pore channels plays a critical role in hydrate plugging. Higher pressure in the pore channels leads to greater risk of hydrate formation and plugging. The study also proposes a formation mechanism for hydrate plugging in microporous channels, including four stages: formation of a water film, formation of a hydrate thin shell, hydrate deposition and growth, and formation of hydrate plugging. These findings provide an experimental foundation for predicting and preventing hydrate plugging in porous media.
Article Energy & Fuels

High-precision nonisothermal transient wellbore drift flow model suitable for the full flow pattern domain and full dip range

Wen-Qiang Lou et al.

Summary: In order to develop a multiphase flow simulator with high adaptability and high accuracy, a multiphase flow database with 3561 groups of data was built and a drift closure relationship with stable continuity and high adaptability was developed. A high-order numerical scheme with strong fault capture ability was constructed by effectively combining MUSCL technology, van Albada slope limiter and AUSMV numerical scheme. The energy equation was coupled into the AUSMV numerical scheme of the drift flow model in the form of finite difference. The accuracy of the simulator was verified by comparing the measurement results with the blowout experiment of a full-scale experimental well.

PETROLEUM SCIENCE (2023)

Article Engineering, Petroleum

Experimental Study and Prediction Model for Hydrate Plugging Formation in Single-Pass Gas-Dominated Pipes with Diameter Reduction

Jianbo Zhang et al.

Summary: Research shows that diameter reductions in flowlines can facilitate the deposition of hydrate particles on pipe walls and the formation of a hydrate deposition layer. Fluid shear force causes hydrate sloughing during the growth of the deposition layer. Increasing diameter reduction or subcooling leads to significantly increased hydrate deposition, resulting in shorter time for hydrate plugging.

SPE JOURNAL (2022)

Article Energy & Fuels

Modeling and characterizing the thermal and kinetic behavior of methane hydrate dissociation in sandy porous media

Youqiang Liao et al.

Summary: This study adopts a LTNE model to investigate the thermal performance during methane hydrate dissociation. The results show that the LTNE model has better simulation accuracy compared to the traditional LTE model, providing more accurate estimations of temperature, gas, and water production profiles. The study also focuses on the Joule-Thomson effect, which has less impact under certain conditions but becomes more significant at high gas saturations.

APPLIED ENERGY (2022)

Article Engineering, Environmental

Modeling of hydrate dissociation surface area in porous media considering arrangements of sand grains and morphologies of hydrates

Youqiang Liao et al.

Summary: The volumetric surface area of hydrates (Ah) in porous media plays a crucial role in hydrate kinetics. This study developed a unified estimation model considering different packing arrangements and structural morphologies to describe the evolution of Ah during hydrate dynamic dissociation. The results showed that sand grain size, packing arrangement, and distance between sand grains affect Ah.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Energy & Fuels

Experimental Investigation on Hydrate Plugging Formation in Horizontal Single-Pass Gas-Dominant Flows

Jianbo Zhang et al.

Summary: This study analyzed the formation of hydrate plugging in single-pass gas-dominant flows in real time and found that a sudden increase in pressure drop, a sudden drop in temperature, and gas flow rate were important signals indicating hydrate plugging formation. As the subcooling of hydrate formation increased, the hydrate deposition ratio increased gradually, and the number of sloughing events and the time required for hydrate plugging significantly decreased. Based on these findings, a formation mechanism and early warning method for hydrate plugging in single-pass gas-dominant flows were proposed. This study provides valuable insights for the monitoring and prevention of hydrate plugging during natural gas field development.

ENERGY & FUELS (2022)

Article Energy & Fuels

A pressure drop prediction model for hydrate slurry based on energy dissipation under turbulent flow condition

Weiqi Fu et al.

Summary: A novel model is proposed to predict the pressure drop of hydrate slurry bubbly flow based on the energy dissipation theory. The reliability of the model is validated using published data.
Article Chemistry, Physical

Molecular dynamics simulation to explore the impact of wax crystal on the formation of methane hydrate

Zhi Li et al.

Summary: In this study, the impact of wax crystal on the formation of methane hydrate was examined using molecular dynamics technique. The results showed that small wax crystals promoted the formation of hydrate while large wax crystals inhibited it. These findings contribute to a better understanding of the interaction between wax and hydrate.

JOURNAL OF MOLECULAR LIQUIDS (2022)

Article Energy & Fuels

Flow characteristic and blockage mechanism with hydrate formation in multiphase transmission pipelines: In-situ observation and machine learning predictions

Jiguang Wang et al.

Summary: Gas hydrate formation and blockage in a pure water system were evaluated using a high-pressure fully visual flow loop. The effects of liquid loading and pump speeds on pressure difference and water conversion rate were investigated. Wet agglomeration was found to cause increased pressure difference and hydrate blockage, and a potential mechanism in the pure water system was proposed. Machine learning methods were applied to establish prediction models for hydrate blockage, achieving high accuracies of 99% and 71%.
Article Energy & Fuels

Effect of wax crystal on the kinetic and morphology of gas hydrate deposition in water-in-oil emulsions

Zhiming Liu et al.

Summary: This study explored the effect of wax content on hydrate formation and deposition, and observed the macroscopic and microscopic morphology of the hydrate deposit layer. The study found that wax influenced the morphology and growth pattern of hydrate, and proposed corresponding mechanisms. Additionally, the adhesive force of hydrate formed in different wax content was measured. This work provides insights on the interaction of hydrate and wax, and can improve flow-assurance strategies in oil-gas production.
Article Energy & Fuels

Effects of wax on CH4 hydrate formation and agglomeration in oil-water emulsions

Jia Liu et al.

Summary: The formation of wax crystals and hydrates in deep-sea crude oil can affect the nucleation, growth, aggregation, and crystal structure of hydrates. Specifically, wax crystals inhibit hydrate formation, while hydrate formation reduces wax crystal aggregation, improving the flow characteristics of the hydrate slurry. Wax has no effect on the crystal structure of CH4 hydrate but impacts the distribution of the gas in cavities.
Article Engineering, Environmental

Experimental and modeling investigations of hydrate phase equilibria in natural clayey-silty sediments

Zheng Liu et al.

Summary: A unified model was developed to predict hydrate phase equilibria in sediments by considering surface adsorption, capillary effect, and salt solution inhibitions. The maximum average error between model predictions and measured data was 3.29%.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Energy & Fuels

Wellbore drift flow relation suitable for full flow pattern domain and full dip range

Wenqiang Lou et al.

Summary: This study established a database with a large amount of experimental data and developed a new model suitable for complex well structures by considering the effects of various factors on multiphase flow parameters, showing high prediction accuracy and stability. The applicability of the model was verified in a field well killing case, demonstrating good agreement between calculated results and field data.

PETROLEUM EXPLORATION AND DEVELOPMENT (2022)

Article Energy & Fuels

Wellbore drift flow relation suitable for full flow pattern domain and full dip range

Wenqiang Luo et al.

Summary: A simulation model for gas kick and well killing in complex-structure wells was developed based on a database of experimental data from various sources. The new model demonstrated high accuracy and stability compared to existing models, and was successfully validated in field applications.

PETROLEUM EXPLORATION AND DEVELOPMENT (2022)

Article Engineering, Chemical

Effects of waxes on hydrate behaviors in water-in-oil emulsions containing asphaltenes

Dongxu Zhang et al.

Summary: The presence of waxes strengthened the inhibiting effect of asphaltenes on hydrate formation in asphaltene-containing water-in-oil emulsions. Wax crystals dispersed in the bulk phase and got adsorbed at water-oil interface through the synergistic effect with asphaltenes, inhibiting the dissociation of hydrates.

CHEMICAL ENGINEERING SCIENCE (2021)

Article Energy & Fuels

Kinetic and rheological investigation of cyclopentane hydrate formation in waxy water-in-oil emulsions

Yuchuan Chen et al.

Summary: This study investigated the impact of wax crystals on hydrate formation and rheological properties of hydrate slurry through rheological experiments, revealing that both wax content and water cut affect the formation and growth of hydrates. Semi-empirical models were proposed to describe the inhibitory effect of wax crystals on hydrate nucleation kinetics. The study also found that the maximum values of hydrate slurry viscosity rate and calculated hydrate effective volume fraction decreased with increasing wax content, and hydrate growth time was extended with higher wax content.
Article Chemistry, Multidisciplinary

Study on the decomposition mechanism and kinetic model of natural gas hydrate slurry in water-in-oil emulsion flowing systems

Xiaofang Lv et al.

Summary: The study investigates the decomposition mechanism of hydrate slurry and proposes that desorption of gas from the surface of decomposed particles may be the main cause of particle coalescence. A comprehensive kinetic model considering influencing factors such as intrinsic kinetics, heat, and mass transfer is proposed, using fugacity difference as the driving force for hydrate decomposition. The model integrates heat and mass transfer effects and can describe trends in gas release and dissociation rate in experimental flow systems.

RSC ADVANCES (2021)

Article Chemistry, Physical

Influence of wax inhibitor molecular weight: Fractionation and effect on crystallization of polydisperse waxes

Jost Ruwoldt et al.

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY (2020)

Article Chemistry, Physical

Effect of wax on hydrate formation in water-in-oil emulsions

Wei Wang et al.

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY (2020)

Article Engineering, Environmental

A new methane hydrate decomposition model considering intrinsic kinetics and mass transfer

Shangfei Song et al.

CHEMICAL ENGINEERING JOURNAL (2019)

Review Engineering, Chemical

Growth kinetics of hydrate formation from water-hydrocarbon system

Youhong Sun et al.

CHINESE JOURNAL OF CHEMICAL ENGINEERING (2019)

Article Engineering, Chemical

Rock-Flow Cell: An Innovative Benchtop Testing Tool for Flow Assurance Studies

Jeong-Hoon Sa et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2019)

Article Energy & Fuels

Distribution and potential of global oil and gas resources

Tong Xiaoguang et al.

PETROLEUM EXPLORATION AND DEVELOPMENT (2018)

Article Instruments & Instrumentation

High pressure rheology of gas hydrate formed from multiphase systems using modified Couette rheometer

Gaurav Pandey et al.

REVIEW OF SCIENTIFIC INSTRUMENTS (2017)

Article Engineering, Chemical

A new hydrate deposition prediction model for gas-dominated systems with free water

Zhiyuan Wang et al.

CHEMICAL ENGINEERING SCIENCE (2017)

Article Chemistry, Physical

Wax adsorption at paraffin oil-water interface stabilized by Span80

Qianli Ma et al.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2017)

Article Engineering, Petroleum

Development of a Tool to Assess Hydrate-Plug-Formation Risk in Oil-Dominant Pipelines

Zachary M. Aman et al.

SPE JOURNAL (2015)

Article Energy & Fuels

Hydrate Formation in Gas-Dominant Systems Using a Single-Pass Flowloop

Mauricio Di Lorenzo et al.

ENERGY & FUELS (2014)

Article Energy & Fuels

Model Water-in-Oil Emulsions for Gas Hydrate Studies in Oil Continuous Systems

Jose G. Degado-Linares et al.

ENERGY & FUELS (2013)

Article Energy & Fuels

Overview of CSMHyK: A transient hydrate formation model

Luis E. Zerpa et al.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2012)

Article Engineering, Chemical

DSC measurements and modelling of the kinetics of methane hydrate formation in water-in-oil emulsion

Didier Dalmazzone et al.

CHEMICAL ENGINEERING SCIENCE (2009)

Article Engineering, Chemical

Methane hydrate formation and an inward growing shell model in water-in-oil dispersions

Douglas J. Turner et al.

CHEMICAL ENGINEERING SCIENCE (2009)

Article Engineering, Chemical

Semiempirical method for determining water content of methane-rich hydrocarbon gas in equilibrium with gas hydrates

Amir H. Mohammadi et al.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2008)

Review Energy & Fuels

History of the development of low dosage hydrate inhibitors

Malcolm A. Kelland

ENERGY & FUELS (2006)

Article Crystallography

Nucleation of gas hydrates

D Kashchiev et al.

JOURNAL OF CRYSTAL GROWTH (2002)