The Effects of Ultra-high Pressure and Temperature on the Rheological Properties of Water-based Drilling Fluids

Amani, Mahmood; Shadravan, Arash; Al-Jubouri, Mohammed; Al-Waily, Muhannad; Wardany, Y. El

doi:10.3997/2214-4609.20148276

Cited by 5 publications

(9 citation statements)

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“…[33] Nanoparticles have been variously described having applications in solving the downhole drilling problems such as string sticking, lost circulation and torque and drag issues. [54][55][56] Singh and Ahmed demonstrated the applications of nanopolymers highlighting their roles and significance in the drilling applications and validated their usage. [57] The applications of various nanoparticles such as graphene, [34] carbonnanotubes, [35] nano-silica [27] and metal oxides [52,56] have been studied for many years for the improvement of rheological and filtration control properties of the water-based drilling fluids.…”

Section: Applications Of Nanomaterials In Drilling Fluidsmentioning

confidence: 94%

“…Sadeghalvaad and Sabbagh reported the application of TiO2/polyacrylamide nanocomposites as effective additives for water base drilling fluids in improving the rheological and filtration control properties and filter cake thickness [33] . Nanoparticles have been variously described having applications in solving the downhole drilling problems such as string sticking, lost circulation and torque and drag issues [54–56] . Singh and Ahmed demonstrated the applications of nanopolymers highlighting their roles and significance in the drilling applications and validated their usage [57] .…”

Section: Applications Of Nanomaterials In Drilling Fluidsmentioning

confidence: 99%

“…Singh and Ahmed demonstrated the applications of nanopolymers highlighting their roles and significance in the drilling applications and validated their usage [57] . The applications of various nanoparticles such as graphene, [34] carbon‐nanotubes, [35] nano‐silica [27] and metal oxides [52,56] have been studied for many years for the improvement of rheological and filtration control properties of the water‐based drilling fluids. In oil and gas drilling, shales account for 75 % of the formations to be drilled and pose 90 % of the downhole drilling problems including wellbore instability, tight hole conditions, wellbore collapse, cavings and string sticking issues [58] .…”

Section: Applications Of Nanomaterials In Drilling Fluidsmentioning

confidence: 99%

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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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Section: Applications Of Nanomaterials In Drilling Fluidsmentioning

confidence: 94%

Section: Applications Of Nanomaterials In Drilling Fluidsmentioning

confidence: 99%

Section: Applications Of Nanomaterials In Drilling Fluidsmentioning

confidence: 99%

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Applications of Emerging Nanomaterials in Drilling Fluids

2022

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“…Thus, adjusting the viscosity profile during a drilling operation can be a time-consuming process. At downhole conditions of high temperature and pressure, oil-based drilling fluids are preferred due to their stable viscosity profile, higher thermal tolerance, and better shale inhibition properties compared to water-based drilling fluids [3,9].…”

Section: Introductionmentioning

confidence: 99%

“…At high temperature and pressure conditions, limited data are reported in literature on the rheological behavior of drilling fluids, and computations are often based on extrapolating from existing models beyond their validated range, which gives unreliable results [5]. Oil-based drilling fluids properties including saturation pressure, density and viscosity were analyzed at high temperature and pressure conditions up to 315.6 °C (600°F) and 1723.7 bar (25,000 psi), respectively [3,49]. Wang et al [50] conducted static sag and rheological measurements at different pressures and temperatures at HPHT conditions.…”

Section: Introductionmentioning

confidence: 99%

Rheology assessment and barite sag in a typical North Sea oil-based drilling fluid at HPHT conditions

Ofei

N’gouamba

Opedal

et al. 2023

Korea-Aust. Rheol. J.

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The occurrence of barite sag in drilling fluids has relatively often been the cause for gas kicks in oilwell drilling. The subsequent absorption of gas into drilling fluid could lower the density and reduce the viscosity of the drilling fluid, thereby aggravating both pressure control and hole cleaning. In this paper, we present experimental measurements of rheological properties and barite sag in a typical North Sea oil-based drilling fluid at downhole pressure and temperature conditions. A new experimental apparatus was setup for barite sag measurements at static condition with operational temperature and pressure capabilities up to 200 °C (392°F) and 1000 bar (14,503.8 psi), respectively. Rheometry measurements were conducted on fluid samples with and without barite particles at operating conditions up to 90 °C and 100 bar. We observed that at a typical shear rate of 250 s−1, which is experienced in 8.5″ hole annulus, the viscosity of fluid sample with barite increased nearly three times as that of the fluid sample without barite as the temperature and pressure increased. However, temperature effect on viscosity dominates at high shear rates compared to pressure effect. Furthermore, the fluid samples showed more shear-thinning effect with increasing yield stress as the temperature increased. On the other hand, barite sag measurements revealed that whereas fluid samples under high pressure are less prone to sag, high temperature fluid samples, however, promote sag significantly. The data from this study are useful to validate extrapolations used in computational models and to improve understanding and operational safety of sag phenomena at downhole conditions. We also discuss the importance of this study in optimizing drilling operations.

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Evaluating the Effect of Claytone-EM on the Performance of Oil-Based Drilling Fluids

Mahmoud,

Gajbhiye,

Elkatatny

2024

ACS Omega

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This study provides a detailed characterization and evaluation of Claytone-EM as a rheological additive to enhance the performance of oil-based drilling fluids (OBDFs) under high-pressure, high-temperature (HPHT) conditions. It also offers a comparative evaluation of the effectiveness of Claytone-EM with an existing organoclay, analyzing their mineral and chemical compositions, morphologies, and particle sizes. A series of experiments are performed to evaluate Claytone-EM’s influence on crucial drilling mud properties, such as mud density, electrical stability, sagging tendency, rheology, viscoelastic properties, and filtration properties, to formulate a stable and high-performing OBDF. Results indicated that Claytone-EM had no significant impact on mud density but remarkably enhanced emulsion stability. Claytone-EM effectively mitigated sagging issues under both static and dynamic conditions, leading to improvements in the plastic viscosity (PV), yield point (YP), apparent viscosity (AV), and YP/PV ratio. The PV, YP, AV, and YP/PV ratios were improved by 11, 85, 28, and 66% increments, respectively, compared with those of the drilling fluid formulated with MC-TONE. The addition of Claytone-EM resulted in enhancing gel strength and improving the filtration properties of the drilling fluid. The filtration volume was reduced by 2% from 5.0 to 4.9 cm3, and the filter cake thickness had a 13% reduction from 2.60 to 2.26 mm. These findings highlight Claytone-EM as a valuable additive for enhancing OBDF performance, particularly under challenging HPHT conditions. Its ability to provide emulsion stability, reduce static and dynamic sag, and control filtration holds the potential to enhance drilling operations, minimize downtime, and bolster wellbore stability. This study acknowledges certain limitations, including its temperature range, which could benefit from exploration at extreme temperatures. Additionally, the absence of flow experiments limits a comprehensive understanding of sag effects, and further research and field-scale evaluations are recommended to validate and optimize the application of Claytone-EM in OBDFs.

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The Effects of Ultra-high Pressure and Temperature on the Rheological Properties of Water-based Drilling Fluids

Cited by 5 publications

References 0 publications

Applications of Emerging Nanomaterials in Drilling Fluids

Applications of Emerging Nanomaterials in Drilling Fluids

Rheology assessment and barite sag in a typical North Sea oil-based drilling fluid at HPHT conditions

Evaluating the Effect of Claytone-EM on the Performance of Oil-Based Drilling Fluids

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