New Cementing Technology Cures 40-Year-Old Squeeze Problems

Farkas, R.; England, Kevin W.; Roy, M. Le; Dickinson, Maurice L.; Samuel, Mathew; Hart, Robert E.

doi:10.2118/56537-ms

Cited by 19 publications

(3 citation statements)

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“…Engineered Micro-cement Slurry (EMS) technology is specifically designed to penetrate more efficiently in narrow gaps without bridging or dehydrating during placement [1].…”

Section: Slurry Selectionmentioning

confidence: 99%

Successful Water Shut Off Treatment With Engineered Micro-Cement Slurry Through Coiled Tubing in Pakistan

Jamil¹,

Ahmad²

2005

Proceedings of SPE/PAPG Annual Technical Conference

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“…Engineered Micro-cement Slurry (EMS) technology is specifically designed to penetrate more efficiently in narrow gaps without bridging or dehydrating during placement [1].…”

Section: Slurry Selectionmentioning

confidence: 99%

Successful Water Shut Off Treatment With Engineered Micro-Cement Slurry Through Coiled Tubing in Pakistan

Jamil¹,

Ahmad²

2005

Proceedings of SPE/PAPG Annual Technical Conference

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“…The process of dehydration would be employed to perform the replacement, which involves the injection of cement slurry into the leak paths [17]. Moreover, work-over jobs have been previously reported to be costly, with exorbitant rates that can reach USD 100,000 per well by virtue of the low success rate of earlier attempts prior to successfully attaining an adequate seal that is serviceable [24].…”

Section: Introductionmentioning

confidence: 99%

Effect of Elastomeric Expandable Additive on Compressive Strength and Linear Expansion of Fly-Ash-Based Strength-Enhanced Geopolymer Cement for Shrinkage-Resistant Oil-Well Cementing

et al. 2022

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The present study aimed to investigate the effect of an expandable additive on the compressive strength and linear expansion of geopolymer cement, which is an alternative to ordinary Portland cement, for oil-well cementing. Fly-ash-based geopolymer cement samples, with the addition of slag cement as a strength enhancer, were prepared by using an elastomeric expandable additive (R-additive), which consists of styrene–butadiene rubber with a specific gravity of 0.945, at concentrations of 10%, 15%, 20% and 25% by weight of the solid blend, and cured in a water bath at 60 °C and atmospheric pressure, and a curing chamber at 90 °C and 3000 psi, or approximately 20.68 MPa. Mixability, amount of free water and slurry density were studied, and the effects of the concentration of R-additive on the compressive strength (F) and linear expansion (∆l/l0) of the samples were analyzed. When cured at 60 °C and atmospheric pressure, the highest F of 15.01 MPa was obtained when the concentration of R-additive was 10%, while the highest ∆l/l0 of 0.9985% was obtained when the concentration of R-additive was 25%. An increase in the curing temperature and pressure to 90 °C and 3000 psi (≈20.68 MPa) resulted in the reduction of F from 15.01 to 14.62 MPa and from 10.33 to 9.61 MPa, and the increase in ∆l/l0 from 0.52% to 0.63%, and from 0.99% to 1.32%, when the concentrations of R-additive were 10% and 25%, respectively. The findings suggest that the formulations adopted, which contain R-additive at concentrations ranging from 10% to 25%, fulfilled the requirements of the oil and gas industry.

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“…Injecting of cement is performed in the cracked formation for sealing the leak; it uses the dehydration process, which requires injecting of cement slurry into the problem area [11]. However, the success rate in the earlier attempts was relatively low and involved several squeeze job before a successful seal obtained; the cost of workover job went up as high as USD100,000 per well [4]. It has become a known fact that the volumetric shrinkage of the cement during hydration contributes substantially to the existing problems of the well cementing system.…”

Section: Introductionmentioning

confidence: 99%

Investigating the expansion characteristics of geopolymer cement samples in a water bath and compared with the expansion of ASTM Class-G cement

Rahman

Irawan

Shafiq

et al. 2020

Heliyon

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In selecting the binder composition for oil well application, its stability is an important design parameter. This paper presents the results of an experimental study conducted for comparing the linear expansion characteristics of geopolymer cement with the traditionally used ASTM Class G cement system. The expansion test was done in a water bath at 60 C subjected to different curing intervals. The linear expansion of a cement system defines as the dimensional changes occur in the system, which is sometimes required to avoid the cement shrinkage during the hydration phase. In the case when the desired level of expansion is not achieved in the system, then the commercially available expandable materials are added in the class G cement system that enables the system to expand to the desired level. Shrinkage in the cementing system causes the formation of a microannulus or induces a gap that may allow the migration of fluid, hence the integrity of the system could be lost. This experimental study has revealed that the geopolymer cement tends to expand 0.15%-0.2% without the addition of any admixture, whereas the ASTM Class G cement has shown a lower value of linear expansion, which was obtained less than 0.1% after 18 days of curing. In the case of Class G cement, the addition of expandable material helped to increase the expansion; in the case of a geopolymer system, the additive has further accelerated the expansion.

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New Cementing Technology Cures 40-Year-Old Squeeze Problems

Abstract: This paper was prepared for presentation at the 1999 SPE Annual Technical Conference and Exhibition held in Houston, Texas, 3–6 October 1999.

Cited by 19 publications

References 0 publications

Successful Water Shut Off Treatment With Engineered Micro-Cement Slurry Through Coiled Tubing in Pakistan

Successful Water Shut Off Treatment With Engineered Micro-Cement Slurry Through Coiled Tubing in Pakistan

Effect of Elastomeric Expandable Additive on Compressive Strength and Linear Expansion of Fly-Ash-Based Strength-Enhanced Geopolymer Cement for Shrinkage-Resistant Oil-Well Cementing

Investigating the expansion characteristics of geopolymer cement samples in a water bath and compared with the expansion of ASTM Class-G cement

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