Review on formation damage mechanisms and processes in shale gas reservoir: Known and to be known

Xu, Chao; Kang, Yili; You, Zhenjiang; Chen, Mingjun

doi:10.1016/j.jngse.2016.03.096

Cited by 150 publications

(49 citation statements)

References 44 publications

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“…The FESEM image shows that the nanoparticles have a spherical shape and an average particle diameter of 36 nm. The spherical shape of the nanoparticles combined with its small particle size is beneficial for enhancing oil recovery [38,39]. The nanoparticles will thus possess high mobility through pore throats and good adsorption of oil molecules and will easily detach oil molecules from the rock surface leading to an improved recovery factor.…”

Section: Fe 3 O 4 Nanofluid Characterizationmentioning

confidence: 99%

Determination of Optimum Frequency for Electromagnetic-Assisted Nanofluid Core Flooding

et al. 2019

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The coupling of electromagnetic (EM) wave to nanoflooding experiments, termed EM-assisted nanoflooding has gained enormous attention in recent years. This brings about the consideration of transmitter efficiency and the propagation pattern of the ensuing EM wave, both of which depend on reservoir electromagnetic properties. However, this has not been considered in previous works, despite its potential to improve the efficiency of the process through energy maximization. Hence, this study considers the effects of reservoir EM properties on the operation of a transmitter. The EM properties of saturated reservoir rock samples were measured. Afterward, a half-wave dipole antenna was modeled in a cylindrical reservoir based on the measured EM properties. The EM propagation pattern of the antenna was simulated in a frequency range of 100 MHz—2.0 GHz using the finite element method. The antenna was found to display dual resonance (at 800 MHz and 1.3 GHz) for sandstone saturated with oil, brine and nanofluid. Application of the EM wave at resonance frequency can help increase the efficiency of EM-assisted nanoflooding.

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Section: Fe 3 O 4 Nanofluid Characterizationmentioning

confidence: 99%

Determination of Optimum Frequency for Electromagnetic-Assisted Nanofluid Core Flooding

et al. 2019

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“…(2) 压裂液的低返排率和钻井完井过程中的工作液侵入所造成的水相圈闭损害 [40,41] , 一定程度上制约了页岩气的最终产出能力液侵入速度. 根据Gallegos等人 [43] 对2014年美国数千口页岩气水平井的统计, 水力压裂过程中进入储层中的平均液量为19425 m 3 , Horn等人 [44] 的统计表明, 美国页岩气井的压裂液返排率通常介于35%~62%, 而Che-kani等人 [45] 的分析认为页岩气井的返排率更低, 通常 http://engine.scichina.com/doi/10.1360/N092017-00202…”

Section: 当前的开发实践表明页岩气产能与压裂形成的裂缝unclassified

Characteristics of multiscale mass transport and coordination mechanisms for shale gas

et al. 2018

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Carbon isotope fractionation during shale gas transport: Mechanism, characterization and significance SCIENCE CHINA Earth Sciences 63, 674 (2020); Characteristics and mechanisms of the annual asymmetry of thermospheric mass density SCIENCE CHINA Earth Sciences 58, 540 (2015); Real gas transport through nanopores of shale gas reservoirs SCIENTIA SINICA Technologica 46, 68 (2016); Recovery mechanisms and key issues in shale gas development

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“…Tight gas reservoirs have been shown to have a strong water‐wet nature and, as such, have the potential of significant capillary energy due to their ultralow initial water saturation phenomena . This creates an extremely powerful capillary suction tendency, which brings water into the matrix and causes WPT, the most common and severe challenge that operations such as well drilling, completion, cementing, fracturing, and acidizing encounter in tight gas reservoir environments …”

Section: Introductionmentioning

confidence: 99%

“…11,12 This creates an extremely powerful capillary suction tendency, which brings water into the matrix and causes WPT, the most common and severe challenge that operations such as well drilling, completion, cementing, fracturing, and acidizing encounter in tight gas reservoir environments. [13][14][15][16][17][18][19][20][21] Research into WPT damage can play a significant role in guiding effective fluid performance design during the exploration and development of a tight gas reservoir. One such study involved spontaneous capillary water imbibition experiments that were carried out to mimic the water invasion process.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the controlling rock petrophysical factors on water phase trapping damage in tight gas reservoirs

Tian

Kang

Jia

et al. 2019

Energy Science & Engineering

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This paper presents an investigation into the effect of rock physical parameters on water phase trapping (WPT) damage in tight gas reservoirs. The investigation involved water imbibition and drainage experiments that were performed to simulate the WPT formation process. Gas permeability was measured before and after WPT, and an empirical formula was used to determine water film thickness in order to examine the influence of WPT on effective gas flow channel. Results showed that the average water saturation of 15 tight core samples increased from 19.41% to 44.76% during water imbibition and declined to 38.72% after drainage. Increments in water saturation caused a degree of damage to gas permeability in the 36.03%‐78.10% range with an average value of 59.31%. Comparative analysis showed that the dominant factors affecting WPT were average pore throat radius followed by rock permeability and porosity. Meanwhile, calculations showed that water film thickness in the 21.22‐38.18 nm range correlated to a reduced effective gas flow channel of 20.20‐45.15 nm caused by WPT, which suggests that tight rocks with smaller pore throats may be particularly sensitive to WPT damage. The relative size of the water film filling the pore throat, trapping gas, and reducing the effective gas flow channel together with the size of the pore throat itself were found to be the most common damage mechanisms of WPT and have proven to be fundamentally beneficial in understanding the controlling factors of these damage mechanisms.

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Review on formation damage mechanisms and processes in shale gas reservoir: Known and to be known

Cited by 150 publications

References 44 publications

Determination of Optimum Frequency for Electromagnetic-Assisted Nanofluid Core Flooding

Determination of Optimum Frequency for Electromagnetic-Assisted Nanofluid Core Flooding

Characteristics of multiscale mass transport and coordination mechanisms for shale gas

Investigation of the controlling rock petrophysical factors on water phase trapping damage in tight gas reservoirs

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