Settling behavior of fine cuttings in fiber-containing polyanionic fluids for drilling and hole cleaning application

Mahmoud, Husameldin; Alhajabdalla, Mohammed; Nasser, Mustafa S.; Hussein, Ibnelwaleed A.; Ahmed, Ramadan; Karami, Hamidreza

doi:10.1016/j.petrol.2020.108337

Cited by 22 publications

(7 citation statements)

References 43 publications

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“…Although model V 2 shows the same manner of error increment with fiber weight percent, it clearly shows a high error ratio compared to model V 1 . This may be because of the 12 mm fiber tendency to form a structured network 23 that blocks the path of the suspended cuttings and causes unpredictable trend.…”

Section: Resultsmentioning

confidence: 99%

“…Recently, many studies showed the use of drilling fluids that include fibrous materials to enhance wellbore cleaning and cutting suspension during the drilling operation. − Field experiments show that fiber-containing sweep fluids may efficiently remove drill cuttings from wells that are horizontal and strongly inclined . According to studies, cutting transport is influenced by cutting parameters, fluid parameters, operational factors, and formation parameters, with the fluid flow rate and rheology being the most tightly regulated characteristics .…”

Section: Introductionmentioning

confidence: 99%

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Settling of Drilling Cuttings in Polymeric Solutions: A Parametric Investigation

et al. 2023

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Drilling fluids, commonly referred to as drilling mud, are pumped into the wellbore to expedite the drilling process by moving drilling cuttings to the surface, suspending cuttings, controlling pressure, stabilizing exposed rock, and providing buoyancy, cooling, and lubrication. Understanding the settling of drilling cuttings in base fluids is crucial for successfully mixing drilling fluid additives. In this study, the response surface method Box−Benhken design (BBD) is used to analyze the terminal velocity of the drilling cuttings in a polymeric base fluid of carboxymethyl cellulose (CMC). The impact of polymer concentration, fiber concentration, and cutting size on the terminal velocity of the cuttings is investigated. The BBD of the three factors (low, medium, and high) is used for two fiber aspect ratios (3 and 12 mm length). The size of the cuttings varied between 1 and 6 mm, while the concentration of CMC was between 0.49 and 1 wt %. The concentration of the fiber was in the range of 0.02−0.1 wt %. Minitab was utilized to determine the optimum conditions for reducing the terminal velocity of the suspended cuttings and then evaluate the effects and interactions of the components. The results show good agreement between model predictions and the experimental results (R 2 = 0.97). According to the sensitivity analysis, cutting size and polymer concentration are the most crucial factors affecting the terminal cutting velocity. Large cutting sizes have the most significant impact on polymer and fiber concentrations. The optimization results revealed that a CMC fluid with a viscosity of 630.4 cP is sufficient to maintain a minimum cutting terminal velocity of 0.234 cm/s with a cutting size of 1 mm and a 0.02 wt % of the 3 mm length fiber.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Settling of Drilling Cuttings in Polymeric Solutions: A Parametric Investigation

et al. 2023

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“…For example, the selection of a drilling fluid is critical for treating LC, as it must be able to keep particles in suspension while permitting the drilling fluid-LCM mixture to enter a loss zone. Drill cuttings, for example, can often seal loss zones as they are transported in the well, but only if the fluid is able to prevent particle settling and avoid particle degradation [24]. One method for testing the drilling fluid transport of particles is the use of flow loop systems with various particles in suspension [25].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Lost Circulation Material Sealing for Geothermal Drilling

Kibikas,

Nakagawa,

Ingraham

et al. 2024

Energies

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Lost circulation is a pervasive problem in geothermal wells that can create prohibitive costs during drilling. The main issue with treatment is that the mechanism of plug formation is poorly understood. Here we applied two experimental approaches to characterize the clogging effectiveness of different materials. Fracture flow tests with different geometries were conducted with various individual materials and mixtures at relevant conditions. A high-temperature flow loop system was also developed to inject single- and mixed-material plugs into a gravel pack with a non-uniform geometry to compare with the fracture tests. The fracture tests revealed that single materials tended to form no plug or an unstable plug, while mixtures of materials were uniformly better at sealing fractures. Gravel pack tests at high temperatures show most of the materials are intact but degraded. The fibrous materials can create partial or unstable plugs in the gravel pack, but mixed-material plugs are far more effective at clogging. Both test types suggest that (1) mixed materials are more effective at blocking fluid flow and (2) fibrous materials seal fracture openings better, while granular materials seal inside fractures or pore throats better. Further research is needed to study the long-term stability of different plug configurations.

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“…In addition, cuttings beds further increase the friction and torque of the drill pipe, leading to frequent incidents of stuck or broken drills and other accidents [13][14][15][16] as well as increasing the difficulty of subsequent logging, cementing completion, and other operations, affecting the engineering quality [17][18][19][20]. A review of borehole cleaning in horizontal and high-angle wells by Mahmoud et al [21] suggested that cuttings transport is greatly influenced by the spinning speed of the drill pipe, the flow rate, and the rheological characteristics of the mud. Ma et al [22] analyzed the influence of the annular velocity, compactness of the drilling fluid, spinning speed of the drill pipe, and eccentricity on hole cleaning through high-angle section and horizontal section cuttings transport experiments.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Hole Cleaning of a Horizontal Wellbore Model with Breakout Enlargement Section

et al. 2023

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Horizontal wells are more likely than vertical wells to have enlarged wellbore sections due to borehole instability. However, there is scarce research on borehole cleaning of horizontal wells with enlarged wellbore sections. In this paper, we establish a horizontal wellbore model with a breakout enlargement section using field borehole diameter data. We used the three-dimensional computational fluid dynamics (CFD) method and the Realizable k-ε turbulence model with the Euler–Euler approach to simulate the effects of the drilling fluid circulation return speed and the spinning speed of the drill pipe on the cutting movement of conventional horizontal wells and horizontal wells with a breakout enlargement section. The simulation results demonstrate that increasing the drilling fluid circulation return speed and the spinning speed of the drill pipe does not significantly improve the hole cleaning impact for horizontal wells with a breakout enlargement section. We analyzed the effects of the enlargement ratio, ellipticity, and principal axis orientation on the borehole cleaning effect of horizontal wells with a breakout enlargement section. The results show that the cleaning impact is better when the enlargement ratio is lower; moreover, the ellipticity is larger and the principal axis orientation is perpendicular to the gravity direction. This paper fills a gap in the existing theory of hole cleaning in horizontal wells and provides a theoretical basis for improving the hole cleaning effect in actual drilling processes.

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Settling behavior of fine cuttings in fiber-containing polyanionic fluids for drilling and hole cleaning application

Cited by 22 publications

References 43 publications

Settling of Drilling Cuttings in Polymeric Solutions: A Parametric Investigation

Settling of Drilling Cuttings in Polymeric Solutions: A Parametric Investigation

Evaluation of Lost Circulation Material Sealing for Geothermal Drilling

Numerical Simulation of Hole Cleaning of a Horizontal Wellbore Model with Breakout Enlargement Section

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