A Mechanistic Model for Horizontal Gravel Pack Displacement

Martins, A.L.; Magalhaes, Joao Vicente Martins de; Calderon, Agostinho; Chagas, C.M.

doi:10.2118/82247-ms

Cited by 11 publications

(2 citation statements)

References 5 publications

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“…Grain size distribution studies of river sediments, when combined with other textural features; provide a wealth of information about the unique characteristics of sediments and their depositional history (Blott and Pye, 2001;and Martins, 2003). Folk & Ward presented a graphical method for performing granulometric analysis more than half a century ago (1957).…”

Section: Introductionmentioning

confidence: 99%

Determination of the variances or similarities in petrographic and sedimentological properties of the sediment samples of two rivers, by determination of the transportation history and depositional environment of the river sands

Maju-Oyovwikowhe¹,

Sunday²

2022

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The sediment of the Rivers Ero and Adogo in Geregu, Ajaokuta, was studied to determine any variances or similarities in petrographic and sedimentological properties. The sediment samples had particle size parameters estimated, with mean values ranging from 0.45 to 0.94 (River Ero) and 0.15 to 0.67 (River Adogo), indicating that the sediment samples are all coarse grained. The sediment samples' standard deviations vary from 0.9 to 1.2 (River Ero) and 0.92 to 1.57 (River Adogo), indicating moderate to poor sorting. The sediment samples' estimated skewness ranges from -0.09 to -0.12 (River Ero) and -0.01 to -0.16 (River Adogo), showing coarse to strongly coarse skewed sediments that were deposited in a high energy environment. The sediment samples have computed kurtosis ranging from 0.63 to 1.01 (River Ero) and 0.65 to 1.06 (River Adogo), indicating platykurtic to Mesokurtic. The sediment samples from the Rivers Ero and Adogo all fall within the river sand field of Sahu 1964, according to bivariate statistics of skewness vs standard deviation. The depositional environment of the sediment samples was characterised using a linear discriminant function, which revealed that the sediment of River Ero is predominantly beach, shallow agitated marine, and shallow marine, whereas the sediment of River Adogo is entirely beach, shallow agitated marine, and shallow marine. The sediment samples are composed of >94 percent quartz and are most likely sourced from the cratonic interior, according to petrographic data.

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Section: Introductionmentioning

confidence: 99%

Determination of the variances or similarities in petrographic and sedimentological properties of the sediment samples of two rivers, by determination of the transportation history and depositional environment of the river sands

Maju-Oyovwikowhe¹,

Sunday²

2022

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“…Based on the finite volume method, Nguyen et al [19] described the flow process of solid-liquid two-phase flow in the axial and radial direction by using three-dimensional numerical simulation. Martins et al [20] proposed a mathematical model to calculate the α wave deposition height based on the two-layer flow model of solid-liquid two-phase flow. Based on the solidliquid two-phase flow theory, Pu [21] established an intelligent calculation system for gravel packing in horizontal wells, which considering formation leakage.…”

Section: Introductionmentioning

confidence: 99%

Numerical simulation of pulsed gravel packing completion in horizontal wells

Zhang¹,

Yang²,

Chen³

et al. 2020

Preprint

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Gravel packing completion method for horizontal wells has the advantages of maintaining high oil production for a long time, maintaining wellbore stability and preventing sand production, so it has become the preferred completion method for horizontal wells. At present, this technology still faces the problems of high sand bed height and poor gravel migration. In order to improve the efficiency of gravel packing in horizontal wells, pulsed gravel packing technology for horizontal wells is proposed for the first time. Based on the mechanism of hydraulic pulse, the Eularian model, RNG K-ε model and CFD model are used to simulate the solid-liquid two-phase flow. By optimizing the parameters such as frequency and amplitude of pulse waveform, the optimal pulse waveform of pulsed gravel packing in horizontal wells is determined. The effects of parameters such as sand-carrying fluid displacement, sand-carrying fluid viscosity, sand-carrying ratio, gravel particle size and string eccentricity on pulsed gravel packing in horizontal wells are studied, and the distribution law of gravel migration velocity and volume fraction in horizontal wells is obtained. According to the results, it can be seen that with the increase of displacement and viscosity of carrier fluid, the volume fraction of fixed bed and moving bed decreases gradually, while that of suspension bed increases gradually. With the increase of sand-carrying ratio, gravel particle size and string eccentricity, the volume fraction of fixed bed and moving bed increases gradually, while that of suspended bed decreases gradually. Comparing the effects of conventional gravel packing and pulsed gravel packing in horizontal wells, it can be concluded that the efficiency of pulsed gravel packing in horizontal wells is higher. The volume fraction of fixed bed and moving bed decreased by 30% and 40% respectively, while the volume fraction of suspended bed increased by 20%. The migration velocity of moving bed and suspended bed increased by 40% and 25% respectively. And the migration ability of gravel improved obviously.

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Horizontal Well Gravel Packing: Dynamic Alpha Wave Dune Height Calculation and Its Impact on Gravel Placement Job Execution

Chen¹

2007

All Days

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Gravel packing long horizontal wells presents many challenges to completion operations. The accurate calculation of Alpha wave dune height under dynamic wellbore conditions is on the top of the list. Alpha wave dune height is critical during job planning and the afterward successful gravel placement execution. Excessive Alpha wave dune height is the cause of many early time screenout and job failures. The job parameters, including wellbore geometry, pump rate, leakoff and leakoff control, fluid density and viscosity, gravel particle size and geometry, liteProp and conventional gravel, wellbore temperature profile, bottomhole pressure distribution, will all have impact on Alpha wave height. This paper investigates and summarizes several particle transfer models, analytical and empirical ones, their applications in Alpha wave dune height calculations, their limitations and effective application windows. The paper also provides dynamic Alpha wave height calculation methodology to account for dynamic bottomhole conditions, especially the fluid leakoff to formation and to screen wash pipe annulus, bottomhole in-situ gravel concentration, and their impact on Alpha wave dune height calculation. The sensitivities of these models under different job conditions are also studied. Several job designs and application histories are presented in the paper to demonstrate the application of different particle transport models. Guidelines are provided for operators to make proper adjustment when an undesired condition is present during gravel placement. Introduction Horizontal well openhole gravel packing is an effective sand control technique. Although the process itself is complex, the gravel placement can be simplified as Alpha-Beta wave packing. Job design and job planning play a critical role in the successful execution of gravel placement. This is especially the case for wells under extreme conditions, such as deep and ultra deep water, long and ultra long horizontal wellbore sections, and unconsolidated formations with low fracture gradient reservoirs.1–7 Gravel packing is a process of particle transfer, a dynamic process of particles being deposited and picked up, being transported forward. Particle transfer in horizontal and deviated pipes have long been research subjects, dealing with particle transport in mining industry, borehole cleaning and gravel packing in oil/gas industry. Different particle transfer models, both analytical and empirical ones have been published and each with its test conditions and applicable window to the field with conditions similar to conditions tested. Particle Transfer Models and Critical Velocity In horizontal pipes the solid-liquid flow can occur in a number of different flow regimes. The common flow regimes are pseudo-homogeneous suspensions, heterogeneous suspensions, heterogeneous suspensions with sliding beds, and stationary beds. Instead of studying the detail behavior of each flow regime, the critical or equilibrium velocities are the focal points of researches. Several models were published and adapted in the area of gravel packing. The Model of Gruesbeck et al. Gruesbeck et al.8 pioneered the studying of gravel packing deviated and horizontal wellbores. The equilibrium velocity model they developed was later used by different authors in publications. The critical velocity model was a curve fitting from experimental data, when plotted observed critical velocity vs calculated critical velocity.

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A Mechanistic Model for Horizontal Gravel Pack Displacement

Cited by 11 publications

References 5 publications

Determination of the variances or similarities in petrographic and sedimentological properties of the sediment samples of two rivers, by determination of the transportation history and depositional environment of the river sands

Determination of the variances or similarities in petrographic and sedimentological properties of the sediment samples of two rivers, by determination of the transportation history and depositional environment of the river sands

Numerical simulation of pulsed gravel packing completion in horizontal wells

Horizontal Well Gravel Packing: Dynamic Alpha Wave Dune Height Calculation and Its Impact on Gravel Placement Job Execution

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