Alternative setting materials for primary cementing and zonal isolation – Laboratory evaluation of rheological and mechanical properties

Kamali, Mohammadreza; Khalifeh, Mahmoud; Saasen, Arild; Godøy, Rune; Delabroy, Laurent

doi:10.1016/j.petrol.2021.108455

Cited by 32 publications

(7 citation statements)

References 19 publications

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“…In the uniaxial compression tests, it was clear that the same trend defined in the UCA tests was represented here, including the loss of the resistance capacity of the CP-S2 sample, confirming the hypothesis that these samples must undergo some degradation process due to the high curing temperature. However, the mechanical tests showed higher compressive strength values than those predicted in the UCA tests, a phenomenon already observed by other authors in the literature [161].…”

Section: Ultrasound Pulse Velocity and Thickening Time Testssupporting

confidence: 80%

Chemo-Physico-Mechanical Behavior of Class G Oil Well Cement Pastes

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Section: Ultrasound Pulse Velocity and Thickening Time Testssupporting

confidence: 80%

Chemo-Physico-Mechanical Behavior of Class G Oil Well Cement Pastes

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“…The results are presented in Fig. 9 [26]. However, the mentioned relation between compressive strength and shear bond strength is only valid for the barrier materials and inner rusty bar.…”

Section: Discussionmentioning

confidence: 97%

“…This is the condition for majority of wells in North Sea, and it is recommended by operating companies. The rheological properties and pumpability of materials at BHCT, and mechanical properties of materials after solidification up to 28 days of curing were tested and published [26]. All materials used for hydraulic bond strength tests were mixed using the API high-speed mixer Waring blender.…”

Section: Materials Preparation and Experimental Proceduresmentioning

confidence: 99%

Experimental Study of Hydraulic Sealability and Shear Bond Strength of Cementitious Barrier Materials

Kamali

Khalifeh

Eid

et al. 2021

Journal of Energy Resources Technology

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In this experimental study, two different cementitious materials including (i) a class of expansive cement currently used for plug and abandonment (P&A) operations, and (ii) a non-cement-based naturally occurring rock, known as geopolymer are selected to examine the hydraulic bond strength and shear bond strength. Clean machined steel and rusty corroded steel were selected to represent the casing. The test samples were cured at 90 °C considered as bottom-hole static temperature (BHST) and under elevated pressure of 17.2 MPa for one week. The hydraulic sealability of the barrier materials tested up to 3.4 MPa of differential pressure. The results indicated that additives used in slurry preparation impact the hydraulic sealability of the material. Additionally, the rusty corroded streel provided a better hydraulic sealability comparing to the clean machined steel for the same cementitious material. The shear bond strength test was performed by running the push-out test. According to the present test observations, no correlation was found between the shear bond and hydraulic bond strength of different barrier materials. The geopolymer showed the lowest shear bond strength, while it provided the highest hydraulic sealability.

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“…The reality of downhole conditions can exert force on different directions to the cement sheath, jeopardize the integrity of the cementitious material, and eventually the integrity of production operations. The forces applied over the cement sheath may lead to having low tensile strength or debonding/poor bonding of cementitious material to casing [40]. The effect of Zn 2+ and K + species on the tensile strength throughout the curing periods can be linked as well to the poisoning effect of Zn 2+ species, which was highlighted in Sec.…”

Section: Indirect Tensile Test (Brazilian Testmentioning

confidence: 97%

Effect of Zn2+ and K+ as Retarding Agents on Rock-Based Geopolymers for Downhole Cementing Operations

Chamssine

Khalifeh

Saasen

2022

Journal of Energy Resources Technology

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Geopolymer material has a potential to function alongside Portland Cement as an efficient cementitious material for well cementing and plug & abandonment applications. Geopolymer material requires retarding agents to be displaced into the well while considering the properties required to maintain efficient zonal isolation through superior mechanical properties. Chemical admixtures affect the material structure and can, in some cases, jeopardize material integrity if not engineered properly to suite downhole conditions. The present article shows the effect of Zn2+ and K+ species have as retarding agents on slurry, mechanical, and microstructural properties. The approach has been carried out to obtain a preliminary overview of how retarding agents can behave in mix design slurries where eventually sealing performance was examined. Samples were cured and examined for periods of 1, 3, 7, 14, and 28 days at downhole conditions. The results obtained confirm a retardation effect by the addition of Zn2+ and K+ species and some shortcomings in early strength development due to a poisoning mechanism by Zn2+ species. This phenomenon indicates the formation of Ca-Zn phase that can hinder the nucleation of the geopolymeric gel structure. No significant effects were observed on the microstructural development throughout the curing period. The effect of Zn2+ species was also observed in increasing threshold for hydraulic sealability. It may be concluded that the tested retarding agents require furthermore development to minimize shortcomings in mechanical properties specifically early strength development.

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Alternative setting materials for primary cementing and zonal isolation – Laboratory evaluation of rheological and mechanical properties

Cited by 32 publications

References 19 publications

Chemo-Physico-Mechanical Behavior of Class G Oil Well Cement Pastes

Chemo-Physico-Mechanical Behavior of Class G Oil Well Cement Pastes

Experimental Study of Hydraulic Sealability and Shear Bond Strength of Cementitious Barrier Materials

Effect of Zn2+ and K+ as Retarding Agents on Rock-Based Geopolymers for Downhole Cementing Operations

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