Improving Cement Placement in Horizontal Wells of Unconventional Reservoirs Using Magneto-Rheological Fluids

Ermila, Mansur; Eustes, A. W.; Mokhtari, Mehdi

doi:10.1190/urtec2013-270

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…Having better control over displacement of cement slurry during cementing could help avoid zonal isolation problems that arise from poor cementing. To this end there has been growing interest in the use of magnetorheological fluids to improve displacement efficiency of fluids (drilling fluids, spacer fluids, cement slurries) in the eccentric casing annuli (Nair et al 2015;Ermila et al 2012Ermila et al , 2013. This new technique is based on the principles of magneto-rheology, where an external magnetic field is applied to a fluid carrying magnetic particles (also known as a magnetorheological fluid).…”

Section: Introductionmentioning

confidence: 99%

Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries

Nair

Patzek

Oort

2017

SPE Annual Technical Conference and Exhibition

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There has been growing interest in the use of magnetorheological fluids to improve displacement efficiency of fluids (drilling fluids, spacer fluids, cement slurries) in the eccentric casing annuli. When magnetic particles are mixed with the cement slurry for improved displacement, they provide an excellent opportunity for sensing the presence and quality of cement in the annulus. This work focuses on using sophisticated 3D computational electromagnetics to simulate the use of a magnetic cement slurry for well cement monitoring. The main goal is to develop a new tool, which is capable of locating magnetic cement slurry that is placed behind a stainless steel casing. An electromagnetic coil was used to generate a magnetic field inside the borehole. It was found that when a current was passed through the electric coils, magnetic field lines passed through the stainless steel casing, the cement annulus and the rock formation. Three sensors were placed inside the cased borehole and the magnetic field strength variations were observed at these locations. Various factors that have a significant influence on zonal isolation were considered. These include, effect of debonding between casing and cement annulus, effect of changing annuli thickness, influence of a fracture in the rock formation, effect of changing magnetic permeability of cement and finally influence of annuli eccentricity. Based on the results shown in the paper along with the next generation of supersensitive magnetic sensors that are being developed, the magnetic approach appears to be a viable alternative for evaluating the quality of the cement annulus to ensure good zonal isolation.

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Section: Introductionmentioning

confidence: 99%

Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries

Nair

Patzek

Oort

2017

SPE Annual Technical Conference and Exhibition

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Temporary Plugging Performance of an Intelligent Liquid Gel with Magnetorheological Fluid

Lei

et al. 2021

Springer Series in Geomechanics and Geoengineering

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Three Phase Flow Characteristics in Inclined Eccentric Annuli

2013

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Gasified (aerated) fluids, having two-phases, are commonly used in drilling operations, especially for achieving underbalanced conditions. While adjusting the flow rates for each phase, common application is to adjust liquid phase for proper cuttings transport, and to adjust gas phase for controlling bottomhole pressure. Unfortunately, each of these phases flow with relatively different local velocities, causing various flow patterns to occur, which leads to fluctuations in hole cleaning performance as well as frictional pressure losses. These flow patterns are influenced by hole inclination, geometry, and presence of cuttings.This study addresses the hydrodynamic behavior of two-phase drilling fluids in inclined section of wellbores with the presence of cuttings as a third phase with inner pipe rotation, considering eccentricity. Extensive experiments were conducted at a cuttings transport flow loop using air-water mixtures under a wide range of flow rates, rate of penetrations (ROPs), pipe rotations and hole inclinations. During the experiments, frictional pressure losses, in-situ flow rates for each phase, ROP, inclination and pipe rotation speed were recorded. The experimental data was also used to investigate the cuttings transport mechanisms. A comprehensive mechanistic model was developed for determining the frictional pressure losses and hole cleaning performance of two-phase drilling fluids based on the experimental observations. It has been concluded that the proposed model is estimating the frictional pressure losses reasonably accurate when compared with the measured values.

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Improving Cement Placement in Horizontal Wells of Unconventional Reservoirs Using Magneto-Rheological Fluids

Cited by 4 publications

References 9 publications

Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries

Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries

Temporary Plugging Performance of an Intelligent Liquid Gel with Magnetorheological Fluid

Three Phase Flow Characteristics in Inclined Eccentric Annuli

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