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Vikas Mahto - One of the best experts on this subject based on the ideXlab platform.

  • Formulation of a water based drilling fluid system with synthesized graft coPolymer for troublesome shale formations
    Journal of Natural Gas Science and Engineering, 2017
    Co-Authors: Rajat Jain, Vikas Mahto
    Abstract:

    Abstract Shale formations consisting of reactive clay mineral of smectite group like montmorillonite may lead to severe wellbore instability problems with conventional water based drilling fluids. This may be due to their high magnitude of rock-fluid interaction inside the wellbore. Problems like hole enlargement, pipe sticking, high toque and drag etc. may escalate drilling cost and time. The present study deals with the applicability of synthesized Polyacrylamide/dially dimethyl ammonium chloride-grafted-gum acacia coPolymer in formulation of novel water based drilling mud system (WBDMS) for troublesome shale formations. The mechanism behind the synthesis was free radical Polymerization. The structural information and morphological properties of coPolymer were determined by Fourier transform infrared spectroscopy (FTIR) and Field emission scanning electron microscopy (FESEM). Further, its effect on filtration and rheology of developed mud system was analyzed thoroughly as per API standard procedures. Further, effectiveness of graft coPolymer on the shale stabilization was investigated using shale dispersion and slake durability tests. The reactivity of core sample with the developed drilling fluid system was analyzed using core flooding experimental setup. The experimental investigations showed that synthesized graft coPolymer has significant effect on rheological parameters and filtration characteristics of the system due to its synergistic effects in the developed system. Also, its shale stabilization property was superior to the commercially used shale stabilizer (partially hydrolyzed Polyacrylamide Polymer). It was evident from the high values of shale recovery and slake durability index. This was achieved due to the presence of cationic ions and formation of a protective coating on shale cuttings. It has also resulted in the low magnitude of rock-fluid interaction. The developed drilling fluid system exhibited low reactivity with the core sample during core flow studies. Thus, the synthesized graft coPolymer can be utilized as an additive in the formulation of water based mud system customized for reactive shale formations.

Rajat Jain - One of the best experts on this subject based on the ideXlab platform.

  • Development of Inhibitive Water Based Drilling Fluid System using synthesized Polyacrylamide-grafted-Gum Arabic/Silica Nanocomposite for Reactive Shale Formations
    79th EAGE Conference and Exhibition 2017, 2017
    Co-Authors: S. Kumar, Rajat Jain
    Abstract:

    Summary The synthesized nanocomposite had shown better rheological and fluid loss control properties in the formulated mud system due to enhanced hydrogen bonding and synergistic effects. The nanocomposite exhibited better shale stabilization property than commercially used partially hydrolyzed Polyacrylamide Polymer. The shale recovery and slake durability index of formulated system with synthesized nanocomposite was higher than PHPA system. This is achieved due to formation of a film-like structure on the surface in presence of synthesized nanocomposite, thus restricting the interaction of solid particles and water molecules into the shale sections.

  • Formulation of a water based drilling fluid system with synthesized graft coPolymer for troublesome shale formations
    Journal of Natural Gas Science and Engineering, 2017
    Co-Authors: Rajat Jain, Vikas Mahto
    Abstract:

    Abstract Shale formations consisting of reactive clay mineral of smectite group like montmorillonite may lead to severe wellbore instability problems with conventional water based drilling fluids. This may be due to their high magnitude of rock-fluid interaction inside the wellbore. Problems like hole enlargement, pipe sticking, high toque and drag etc. may escalate drilling cost and time. The present study deals with the applicability of synthesized Polyacrylamide/dially dimethyl ammonium chloride-grafted-gum acacia coPolymer in formulation of novel water based drilling mud system (WBDMS) for troublesome shale formations. The mechanism behind the synthesis was free radical Polymerization. The structural information and morphological properties of coPolymer were determined by Fourier transform infrared spectroscopy (FTIR) and Field emission scanning electron microscopy (FESEM). Further, its effect on filtration and rheology of developed mud system was analyzed thoroughly as per API standard procedures. Further, effectiveness of graft coPolymer on the shale stabilization was investigated using shale dispersion and slake durability tests. The reactivity of core sample with the developed drilling fluid system was analyzed using core flooding experimental setup. The experimental investigations showed that synthesized graft coPolymer has significant effect on rheological parameters and filtration characteristics of the system due to its synergistic effects in the developed system. Also, its shale stabilization property was superior to the commercially used shale stabilizer (partially hydrolyzed Polyacrylamide Polymer). It was evident from the high values of shale recovery and slake durability index. This was achieved due to the presence of cationic ions and formation of a protective coating on shale cuttings. It has also resulted in the low magnitude of rock-fluid interaction. The developed drilling fluid system exhibited low reactivity with the core sample during core flow studies. Thus, the synthesized graft coPolymer can be utilized as an additive in the formulation of water based mud system customized for reactive shale formations.

Laila Hussein Gaabour - One of the best experts on this subject based on the ideXlab platform.

  • influence of silica nanoparticles incorporated with chitosan Polyacrylamide Polymer nanocomposites
    Journal of materials research and technology, 2019
    Co-Authors: Laila Hussein Gaabour
    Abstract:

    Abstract Nanocomposite films based on chitosan (Cs) and Polyacrylamide (PAM) embedded with silica nanoparticles (SiO2) were prepared. The films were studied and characterized using different techniques. The X-ray diffraction revealed the presence of the semi-crystalline nature of Cs/PAM blend. No peaks characterizing pure SiO2 were observed due to the masking effect of the Cs/PAM blend matrix resulting of the low amount of SiO2. The main characteristic IR-bands to the vibrational groups for Cs/PAM were observed. No changes in the position of IR bands were seen after incorporation of SiO2 nanoparticles. The UV–vis spectra showed an absorption band at 253 nm with a sharp absorption edge which indicates the semi-crystalline nature of Cs/PAM matrices. The spectra optical parameters were measured and characterized as a function of photon energy. The value of optical energy gap ( E g ) was estimated using indirect transition model and explained due to local cross-linking in the amorphous regions of Cs/PAM. The plot of dielectric loss and dielectric constant e ′ and e ″ with the frequency was gradually decreased with the increase of the frequency and reaches to constant values at higher frequencies due to polarization effects. The plot of real impedance (Z′) with imaginary impedance Z″ gives a perfect semicircle correlated to Debye behavior.

  • Influence of silica nanoparticles incorporated with chitosan/Polyacrylamide Polymer nanocomposites
    Journal of Materials Research and Technology, 2019
    Co-Authors: Laila Hussein Gaabour
    Abstract:

    Abstract Nanocomposite films based on chitosan (Cs) and Polyacrylamide (PAM) embedded with silica nanoparticles (SiO2) were prepared. The films were studied and characterized using different techniques. The X-ray diffraction revealed the presence of the semi-crystalline nature of Cs/PAM blend. No peaks characterizing pure SiO2 were observed due to the masking effect of the Cs/PAM blend matrix resulting of the low amount of SiO2. The main characteristic IR-bands to the vibrational groups for Cs/PAM were observed. No changes in the position of IR bands were seen after incorporation of SiO2 nanoparticles. The UV–vis spectra showed an absorption band at 253 nm with a sharp absorption edge which indicates the semi-crystalline nature of Cs/PAM matrices. The spectra optical parameters were measured and characterized as a function of photon energy. The value of optical energy gap ( E g ) was estimated using indirect transition model and explained due to local cross-linking in the amorphous regions of Cs/PAM. The plot of dielectric loss and dielectric constant e ′ and e ″ with the frequency was gradually decreased with the increase of the frequency and reaches to constant values at higher frequencies due to polarization effects. The plot of real impedance (Z′) with imaginary impedance Z″ gives a perfect semicircle correlated to Debye behavior.

Mohamed Zahouily - One of the best experts on this subject based on the ideXlab platform.

  • Novel bionanocomposite films based on graphene oxide filled starch/Polyacrylamide Polymer blend: structural, mechanical and water barrier properties
    Journal of Polymer Research, 2018
    Co-Authors: Annie Moussemba Nzenguet, Meryem Aqlil, Younes Essamlali, Othmane Amadine, Asmae Snik, Mohamed Larzek, Mohamed Zahouily
    Abstract:

    Novel bionanocomposite films based on wheat starch (ST) blended high molecular weight Polyacrylamide (PAM) and filled with graphene oxide nanosheets (GO) were prepared by casting/evaporation technique of the corresponding film-forming solutions (FFS). Addition of PAM was performed in order to overcome brittleness of the starch material. Physicochemical properties of the starch and ST/PAM blend films were compared in order to highlight the specific strengthening and toughening effects of PAM on the ST/PAM blend. Structural analysis by means of Fourier Transform Infrared spectroscopy by attenuated total reflectance (ATR-FTIR) technique revealed that strong hydrogen bonding interactions occurred between ST and PAM molecules and ST/PAM blend and GO nanosheets, which result in a significant enhancement of the physicochemical, thermal and mechanical properties of the ST/PAM-GO bionanocomposites. Results showed that incorporation of 1 wt% of GO into the ST/PAM blend led to a significant improvement of tensile strength by 167.17%. Moreover, water vapor permeability and moisture uptake of the ST/PAM-GO films were significantly reduced of increasing amount of GO as nanofiller.

  • novel bionanocomposite films based on graphene oxide filled starch Polyacrylamide Polymer blend structural mechanical and water barrier properties
    Journal of Polymer Research, 2018
    Co-Authors: Annie Moussemba Nzenguet, Meryem Aqlil, Younes Essamlali, Othmane Amadine, Asmae Snik, Mohamed Larzek, Mohamed Zahouily
    Abstract:

    Novel bionanocomposite films based on wheat starch (ST) blended high molecular weight Polyacrylamide (PAM) and filled with graphene oxide nanosheets (GO) were prepared by casting/evaporation technique of the corresponding film-forming solutions (FFS). Addition of PAM was performed in order to overcome brittleness of the starch material. Physicochemical properties of the starch and ST/PAM blend films were compared in order to highlight the specific strengthening and toughening effects of PAM on the ST/PAM blend. Structural analysis by means of Fourier Transform Infrared spectroscopy by attenuated total reflectance (ATR-FTIR) technique revealed that strong hydrogen bonding interactions occurred between ST and PAM molecules and ST/PAM blend and GO nanosheets, which result in a significant enhancement of the physicochemical, thermal and mechanical properties of the ST/PAM-GO bionanocomposites. Results showed that incorporation of 1 wt% of GO into the ST/PAM blend led to a significant improvement of tensile strength by 167.17%. Moreover, water vapor permeability and moisture uptake of the ST/PAM-GO films were significantly reduced of increasing amount of GO as nanofiller.

Annie Moussemba Nzenguet - One of the best experts on this subject based on the ideXlab platform.

  • Novel bionanocomposite films based on graphene oxide filled starch/Polyacrylamide Polymer blend: structural, mechanical and water barrier properties
    Journal of Polymer Research, 2018
    Co-Authors: Annie Moussemba Nzenguet, Meryem Aqlil, Younes Essamlali, Othmane Amadine, Asmae Snik, Mohamed Larzek, Mohamed Zahouily
    Abstract:

    Novel bionanocomposite films based on wheat starch (ST) blended high molecular weight Polyacrylamide (PAM) and filled with graphene oxide nanosheets (GO) were prepared by casting/evaporation technique of the corresponding film-forming solutions (FFS). Addition of PAM was performed in order to overcome brittleness of the starch material. Physicochemical properties of the starch and ST/PAM blend films were compared in order to highlight the specific strengthening and toughening effects of PAM on the ST/PAM blend. Structural analysis by means of Fourier Transform Infrared spectroscopy by attenuated total reflectance (ATR-FTIR) technique revealed that strong hydrogen bonding interactions occurred between ST and PAM molecules and ST/PAM blend and GO nanosheets, which result in a significant enhancement of the physicochemical, thermal and mechanical properties of the ST/PAM-GO bionanocomposites. Results showed that incorporation of 1 wt% of GO into the ST/PAM blend led to a significant improvement of tensile strength by 167.17%. Moreover, water vapor permeability and moisture uptake of the ST/PAM-GO films were significantly reduced of increasing amount of GO as nanofiller.

  • novel bionanocomposite films based on graphene oxide filled starch Polyacrylamide Polymer blend structural mechanical and water barrier properties
    Journal of Polymer Research, 2018
    Co-Authors: Annie Moussemba Nzenguet, Meryem Aqlil, Younes Essamlali, Othmane Amadine, Asmae Snik, Mohamed Larzek, Mohamed Zahouily
    Abstract:

    Novel bionanocomposite films based on wheat starch (ST) blended high molecular weight Polyacrylamide (PAM) and filled with graphene oxide nanosheets (GO) were prepared by casting/evaporation technique of the corresponding film-forming solutions (FFS). Addition of PAM was performed in order to overcome brittleness of the starch material. Physicochemical properties of the starch and ST/PAM blend films were compared in order to highlight the specific strengthening and toughening effects of PAM on the ST/PAM blend. Structural analysis by means of Fourier Transform Infrared spectroscopy by attenuated total reflectance (ATR-FTIR) technique revealed that strong hydrogen bonding interactions occurred between ST and PAM molecules and ST/PAM blend and GO nanosheets, which result in a significant enhancement of the physicochemical, thermal and mechanical properties of the ST/PAM-GO bionanocomposites. Results showed that incorporation of 1 wt% of GO into the ST/PAM blend led to a significant improvement of tensile strength by 167.17%. Moreover, water vapor permeability and moisture uptake of the ST/PAM-GO films were significantly reduced of increasing amount of GO as nanofiller.