Experimental study of friction reducer effect on dynamic and isotherm of methane desorption on Longmaxi shale

Liu, Zhonghua; Bai, Baojun; Wang, Yanling; Ding, Zhongpei; Li, Jun; Qu, Hai; Jia, Zhenfu

doi:10.1016/j.fuel.2020.119733

Cited by 10 publications

(4 citation statements)

References 37 publications

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“…To better understand the relationship between the methane desorption capacity and gas pressure, the desorption efficiency is defined as the amount of methane desorption on shale powders per unit pressure drop and mass, and is expressed as the first derivative of the Freundlich equation as below 36:

true η = V^{'} = kn P^{n - 1}

…”

Section: Resultsmentioning

confidence: 99%

Lab‐Scale Investigation of Slickwater Impact on Methane Desorption on Longmaxi Gas Shale

Ding

Yang

et al. 2022

Chem Eng & Technol

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After multistage hydraulic fracking, a huge amount of slickwater stuck in shale gas formation significantly affects the shale‐gas‐well production performance. A set of comparative experiments to illustrate slickwater and its chemicals' impact on the methane desorption on shale powders were performed. The influence of slickwater and its chemicals on desorption isotherm, desorption efficiency, and adsorbed phase methane content as well as cumulative gas production was analyzed. The findings reflect the synthetic slickwater impact on methane desorption on shale powders, indicating that it can be helpful to optimize slickwater formulation and design shale‐gas‐well bottom flow pressure to obtain higher gas production. Also, the observations and analysis give a supplement for improving shale gas recovery through studying the function of chemical additives in slickwater on methane desorption.

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true η = V^{'} = kn P^{n - 1}

…”

Section: Resultsmentioning

confidence: 99%

Lab‐Scale Investigation of Slickwater Impact on Methane Desorption on Longmaxi Gas Shale

Ding

Yang

et al. 2022

Chem Eng & Technol

Self Cite

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“…The mathematical model of shale gas adsorption is usually established based on isothermal adsorption experiment by using classical adsorption models to fit the experimental results, − mainly including the mono molecule layer adsorption model, the multimolecular layers adsorption model, the microporous filling model, the simplified local density (SLD) adsorption model, the Ono-Kondo adsorption model, and the modified models based on classical adsorption theories. − Although a large amount of research on experiments, simulation, and models of shale gas adsorption has been reported, these rich achievements are mainly for shallow and middle shale, so they cannot directly describe the more complex adsorption characteristics, such as deep shale gas reservoirs with higher temperature and higher pressure. Therefore, it is important to review the existing research methods and adsorption models of shale gas and clarify their features, and then put forward the next research direction.…”

Section: Introductionmentioning

confidence: 99%

Adsorption Models for Shale Gas: A Mini-Review

et al. 2022

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Clarifying shale gas adsorption mechanism and establishing a reliable shale gas adsorption model are the basis of evaluating shale gas geological reserve and studying flow theory, so rich research on shale gas adsorption has been reported recently. However, with the development of shale gas reservoirs, the reservoir depth is deeper, and the environment is more complicated, especially the characteristic of high temperature and high pressure. These bring a new challenge to reveal the deep shale gas adsorption characteristics by using existing shale gas adsorption theoretical models established based on the middle and shallow shale gas reservoirs. Therefore, the popular methods of experiments, simulation, and models on shale gas adsorption are summarized in detail, and their advantages and disadvantages are clarified. The results show that the isothermal adsorption experiment of shale gas is still the basis method to study shale gas adsorption, but the experimental pressure should be further increased to meet the conditions of deep shale gas reservoir. Molecular simulation can reveal the shale gas adsorption microcosmic mechanisms, but the simulation results have multiple solutions, and the simulation scale is small, difficult to truly reflect the adsorption characteristics of shale gas in a larger scale. Shale gas adsorption models are established mostly based on classical adsorption models or their modifications, and hence they are difficult to reflect shale reservoir characteristics, such as total organic carbon (TOC), primary water, and desorption hysteresis. Therefore, it is important to establish a set of shale gas adsorption−desorption model which can fully consider the shale reservoir characteristics in the future.

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“…In recent years, the utilization of oil and gas in the unconventional reservoirs [1,2], including gas shale [3,4], oil shale, and glutenite has attracted increased attention. Hydraulic fracturing is essential to increase production, which can form fractures with high conductivity, thus enhancing the ability of oil or gas to flow into the wells and increasing their productivity for cost-effective mining.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Propagation Mechanisms of a Hydraulic Fracture in Glutenite Reservoirs Using DEM

Tang¹,

Liu²,

Zhang³

2022

Energies

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The geometry heterogeneity induced by embedded gravel can cause severe stress heterogeneity and strength heterogeneity in glutenite reservoirs, and subsequently affect the initiation and propagation of hydraulic fractures. Since the discrete element method (DEM) can accurately describe the inter-particle interactions, the macromechanical behavior of glutenite specimen can be preciously represented by DEM. Therefore, the initiation and propagation mechanisms of hydraulic fractures were investigated using a coupling seepage-DEM approach, the terminal fracture morphologies of hydraulic fractures were determined, and the effects of stress differences, permeability, and gravel strength were studied. The results show that the initiation and propagation of hydraulic fractures are significantly influenced by embedded gravel. In addition, the stress heterogeneity and strength heterogeneity induced by the gravel embedded near the wellbore increase local initiation points, causing a complicated fracture network nearby. Moreover, due to the effect of local stress heterogeneity, gravel strength, and energy concentration near the fracture tip, four interactions of attraction, deflection, penetration, and termination between propagating fractures and encountering gravel were observed.

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Experimental study of friction reducer effect on dynamic and isotherm of methane desorption on Longmaxi shale

Cited by 10 publications

References 37 publications

Lab‐Scale Investigation of Slickwater Impact on Methane Desorption on Longmaxi Gas Shale

Lab‐Scale Investigation of Slickwater Impact on Methane Desorption on Longmaxi Gas Shale

Adsorption Models for Shale Gas: A Mini-Review

Investigation on the Propagation Mechanisms of a Hydraulic Fracture in Glutenite Reservoirs Using DEM

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