Integrated Primary Cementing Study Defines Key Factors for Field Success

Lockyear, Christopher F.; Hibbert, A.P.

doi:10.2118/18376-pa

Cited by 41 publications

(14 citation statements)

References 1 publication

(2 reference statements)

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“…The simulation is run using various displacement rates to optimize the cement packer placement. In addition, the LCP may be re-designed to optimize rheologies resulting in better performance for the simulation (15) . As seen in TABLE 1, LCP slurries more commonly have lower rheologies than conventional cement slurries resulting in ECD, surface treating pressure and wellbore fluid displacement advantages (8,9) .…”

Section: Cement Packer Placement Using Lcpmentioning

confidence: 99%

Gulf of Mexico Cement Packer Completions Using Liquid Cement Premix

Eberhardt¹,

Shine²

2004

SPE Annual Technical Conference and Exhibition

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TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractA popular and economical method of re-completing wells in offshore Gulf of Mexico (GOM) involves pumping a "cement packer" across a productive zone which the operator wishes to produce. Recently, the application of Liquid Cement Premix (LCP) technology for cement packer completions has shown many advantages. This paper will summarize the operational and logistical process of pumping a cement packer with conventional cement. In addition, the chemistry and properties of LCP along with the process of performing a cement packer completion using LCP will be detailed. The operational and logistical benefits of using LCP will be discussed, concentrating on its ease of transportation and pumping, minimal equipment requirements, consistent slurry properties, and reduced environmental exposure. Best practices recommendations will also be made for cement packer placements, supported by the evaluation of published literature and previous cement packer completions using LCP.

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Section: Cement Packer Placement Using Lcpmentioning

confidence: 99%

Gulf of Mexico Cement Packer Completions Using Liquid Cement Premix

Eberhardt¹,

Shine²

2004

SPE Annual Technical Conference and Exhibition

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“…Previous studies show that the displacement process through vertical wells are ruled primarily by the viscosity and density ratios of the fluids, the eccentricity of the annulus, and the flow rate (e.g. [1][2][3][4][5][6]). In addition, other variables such as the casing rotation and well geometry can influence the displacement efficiency ( [4,7,8]).…”

Section: Introductionmentioning

confidence: 99%

Flow displacement in eroded regions inside annular ducts

Naccache

Pinto

Abdu

2018

J Braz. Soc. Mech. Sci. Eng.

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This work presents a numerical study of the displacement of two fluids through vertical annular ducts with an enlargement in the cross section. This flow is found in cementation operations in the oil industry. A successful cementing operation is obtained when the cement slurry is able to effectively displace the drilling fluid from the annular space between the wellbore and the casing. The process is very complex, since both fluids can have non-Newtonian behaviour, and the flow is time-dependent. In addition, in many situations the wells have some eroded regions, where the cross-sectional area is larger than the regular well annular cross section. The optimization of the displacement efficiency is important not only because of the cost of the process, but also due to security problems, since a unsuccessful operation may result in the collapse of the oil well. The displacement efficiency is a function of the fluids rheology, the density ratio, the flow rate, and the geometry. This work presents an analysis of the influence of rheology, flow rate and geometry on the displacement process inside annular ducts with an eroded region. The governing conservation equations are solved for an axisymmetric flow using the finite volume method. The multiphase problem is dealt using the volume of fluid method. Flow pattern along the eroded region and the displacement efficiency are presented and discussed for different pairs of fluids. The results show that the displacement through the eroded region is better for larger aspect ratios (or longer eroded regions). It is also observed that inertia tends to shift the interface towards the exit wall of the eroded region, leading to lower displacement efficiencies. Keywords Viscoplastic fluids Á Yield stress Á Eroded wells Á Fluid displacement 8 j Volume occupied by phase j in the cell control volume 8 Greek symbols a Symmetry factor b Displacement efficiency Dp Pressure drop in the developed region of the tube _ c Intensity of the rate-of-strain tensor _ c c Characteristic shear rate _ c cr Critical rate-of-strain modulus g c Characteristic viscosity g r Viscosity ratio

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“…Many phenomena have been suspected to play a role in this effect, but no critical comparison exists concerning their relative importance because fluid-loss agents for cements are expensive and many operators believe that the mudcake provides sufficient fluid-loss control. 1,2 The first objective of this paper is to review the literature to discern the importance of fluid loss in primary cementing and to establish ways of comparing various means by which fluid loss may affect primary cementing. This review will provide tools that can be used to predict whether good fluid-loss control is needed for a specific cement slurry on a given job.…”

Section: Introductionmentioning

confidence: 99%

How Fluid Loss Influences Primary Cementing: Literature Review and Methodology

Daccord

Baret

1994

SPE Drilling &Amp; Completion

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Fluid loss during cementing has long been suspected to have detrimental consequences, including reduction of slurry volume; increased slurry density and viscosity; cement-cake deposition, which may cause additional decreases in friction pressure during placement; and near-wellbore reservoir filtrate invasion. This paper briefly reviews and quantifies these consequences. Given well geometry, job design, and cement slurry fluid-loss properties, we show how to predict the critical phenomena that are most likely to impair cementing and the most sensitive well or slurry parameters. By coupling these results and the degree of accuracy with which well parameters are known, one can calculate prediction uncertainty (the error bar) and deduce the key parameters that affect this error bar.Slurry volume reduction, DV, m 3

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Integrated Primary Cementing Study Defines Key Factors for Field Success

Cited by 41 publications

References 1 publication

Gulf of Mexico Cement Packer Completions Using Liquid Cement Premix

Gulf of Mexico Cement Packer Completions Using Liquid Cement Premix

Flow displacement in eroded regions inside annular ducts

How Fluid Loss Influences Primary Cementing: Literature Review and Methodology

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