Role of nanocomposite additives in well bore stability during shale formation drilling with water based mud – A comprehensive review

Sudharsan, J.; Khare, Sunil Kumar

doi:10.1016/j.matpr.2022.04.009

Cited by 14 publications

(9 citation statements)

References 30 publications

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“…A significant interfacial area between the components of the nanocomposites may result from the homogeneous dispersion of the nanofillers. Several parameters, including polymer matrix properties, nature and type of nanofiller, polymer and filler concentration, particle size, and particle distribution, are believed to contribute to the enhanced action of the filler [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Structural and Optical Characterization of g-C3N4 Nanosheet Integrated PVC/PVP Polymer Nanocomposites

Alshammari

et al. 2023

Polymers

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The present work considers the integration of g-C3N4 nanosheets into PVC/PVP polymer nanocomposites at ratios of 0.0, 0.3, 0.6, and 1.0 wt%. The XRD data scans showed semicrystalline structures for all PVC/PVP/g-C3N4 polymer blend films. The FTIR and Raman measurements revealed intermolecular hydrogen bonding between the g-C3N4 surface and the OH− groups of the PVC/PVP network. ESEM morphology analysis for PVC/PVP/g-C3N4 nanocomposite films displayed homogeneous surface textures. The data of TGA showed improved thermal stability as the decomposition temperature increased from 262 to 276 °C with the content of g-C3N4 (0.0–1.0 wt%). The optical absorbance data for PVC/PVP films improved after the addition of g-C3N4. The optical energy gaps showed compositional dependence on the g-C3N4 content, which changed from 5.23 to 5.34 eV at indirect allowed transitions. The refractive index for these blend films enhanced (1.83–3.96) with the inclusion of g-C3N4. Moreover, the optical susceptibility for these nanocomposite films increased as the content of g-C3N4 changed from 0.0 to 1.0 wt%. Finally, the values of the nonlinear refractive index showed improvement with the increased percentage of g-C3N4. When g-C3N4 was added up to 1.0 wt%, the DC conductivity improved from 4.21 × 10−8 to 1.78 x 10−6 S/cm. The outcomes of this study prove the suitable application of PVC/PVP/g-C3N4 in optoelectronic fiber sensors.

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Section: Introductionmentioning

confidence: 99%

Structural and Optical Characterization of g-C3N4 Nanosheet Integrated PVC/PVP Polymer Nanocomposites

Alshammari

et al. 2023

Polymers

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“…The HPEI‐silica nanoparticles were able to reduce the permeability of shale by up to 85.50 %. They also outperformed pure nano‐silica particles in terms of physical plugging [70,71] …”

Section: Applications Of Nanomaterials In Drilling Fluidsmentioning

confidence: 99%

Applications of Emerging Nanomaterials in Drilling Fluids

2022

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Nanomaterials find several applications in the oilfield operations. In oilwell drilling, nanomaterials are being used for mitigating wellbore instability conditions, improving thermal stability of the fluid, minimizing formation damage by preventing fluid invasion into the reservoir, improving fluid rheology, and controlling fluid loss. A wide range of nanomaterials from organic as well as inorganic and composites are being developed to accomplish the mentioned functions. Significant nanomaterials being developed include nanocellulosic particles, nanoclay, nanosilica, nanometals, nanometal oxides and nanopolymers. Improving fluid properties to develop smart fluids by the incorporation of nanomaterials is an emerging research field which is yielding promising results. This review article presents the recent development made in the applications of the nanomaterials in drilling fluids especially the nanosilica particles surface modified by organic ligands. Surface modification of nanosilica with organic ligands namely 3‐Glycidoxypropyl‐triethoxy silane (GPTS), hyperbranched polyethyleneimine (HPEI) and Moringa oleifera cationic protein (MOCP) are discussed. Applications of nanomaterials in drilling fluids to minimize wellbore instability, prevent formation damage, improve thermal stability and conductivity, stabilize fluid rheology, improve hole cleaning, and minimize the chances of downhole string sticking have been reviewed.

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“…For a long time, the mainstream view has been that the hydration reaction of clay minerals in shale is one of the most important factors affecting the shale strength. − Therefore, many scholars have studied the mechanisms of hydration and measures to reduce the shale hydration reaction. − On the one hand, inhibitory inorganic salts or organic salts represented by KCl are added to the drilling fluid in large quantities, effectively controlling the hydration reaction. On the other hand, different scales of micro–nano-scale particles are added to the drilling fluid in order to form a plugging layer in the shale and reduce the hydration reaction by preventing water entering the shale. , The above two methods have been considerably applied in drilling sites.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Adaptability of Plugging Drilling Fluids to Wellbore Stability in Hard Brittle Shale Formations

et al. 2022

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The problem of wellbore stability in hard brittle shale formations is an important research topic in the exploration and development of shale gas. To solve this problem, the adaptability of the plugging drilling fluid to wellbore stability in the hard brittle shale of the tertiary Dongying formation in Bohai Bay Basin, China, was investigated. The results show that the clay content of the hard brittle shale in the study block is as high as 39.2% on average, with great possibility for hydration. The pore structure in the shale is dominated by micron-scale fractures and pores. A dense structure was formed on the surface of the shale after being immersed in plugging drilling fluid, and the matrix permeability of the shale was reduced by 91.1% and the fracture permeability by 98.7%. The water content increment of the shale after immersion was merely 0.75%, which reduced the probability of hydration greatly. Compared with the field-inhibitive drilling fluid, the plugging drilling fluid improved the uniaxial compressive strength of shale by 28%, which is more conducive to maintaining the wellbore stability. The seepage stress aggravates the risk of wellbore instability, while the hydration stress does not, but both increase the risk of rock instability at positions away from the well wall. The plugging drilling fluid affects the seepage stress and hydration stress by reducing the shale permeability and water content. With the decrease of permeability and water content, the potential instability zone of a wellbore becomes smaller.

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Role of nanocomposite additives in well bore stability during shale formation drilling with water based mud – A comprehensive review

Cited by 14 publications

References 30 publications

Structural and Optical Characterization of g-C3N4 Nanosheet Integrated PVC/PVP Polymer Nanocomposites

Structural and Optical Characterization of g-C3N4 Nanosheet Integrated PVC/PVP Polymer Nanocomposites

Applications of Emerging Nanomaterials in Drilling Fluids

Experimental Study on the Adaptability of Plugging Drilling Fluids to Wellbore Stability in Hard Brittle Shale Formations

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