Cementing Deepwater, Low-Temperature Gulf of Mexico Formations Prone to 
Shallow Flows

O'Leary, Jim; Flores, Juan; Rubinstein, Paulo; Garrison, Greg

doi:10.2523/87161-ms

Proceedings of IADC/SPE Drilling Conference 2004

DOI: 10.2523/87161-ms

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Cementing Deepwater, Low-Temperature Gulf of Mexico Formations Prone to Shallow Flows

Jim O'Leary¹,

Juan Flores

Paulo Rubinstein

et al.

Abstract: fax 01-972-952-9435. AbstractShallow gas and water flows are a major concern when cementing deepwater wells in many Gulf of Mexico fields, often requiring expensive remedial work, premature well abandonment and respudding. Entire templates can be compromised if a single cement job on surface pipe fails to provide zonal isolation from the shoe up to the mud line.

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2011

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Mechanism and performance of a lithium chloride accelerator

Wang

Cheng

et al. 2011

Pet. Sci.

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To address present concerns about thickening time and high early-strength in deepwater cementing at low temperatures when using conventional accelerators, a new type of set-accelerating admixture comprising of lithium chloride, aluminium hydroxide and alkaline metal chlorides, named as LS-A, was studied in this paper. Mechanism analysis and performance tests show that the accelerator LS-A accelerated the hydration of tri-and dicalcium silicates (C 3 S and C 2 S) at low-temperatures by speeding up the breakdown of the protective hydration fi lm and shortening the hydration induction period. Therefore, LS-A could shorten the low-temperature thickening time and the transition time of critical gel strength from 48 to 240 Pa of the Class-G cement slurry, and improve the early compressive strength of set cement at low-temperatures. It exhibited better performance than calcium chloride and had no effect on the type of hydration products, which remain the same as those of neat Class-G cement, i.e. the calcium silicate gel, Ca(OH) 2 crystals and a small amount of ettringite AFt crystals. LS-A provides an effective way to guarantee the safety of cementing operations, and to solve the problems of low temperature and shallow water/gas fl owing faced in deepwater cementing.

show abstract

Mechanism and performance of a lithium chloride accelerator

Wang

Cheng

et al. 2011

Pet. Sci.

View full text Add to dashboard Cite

show abstract

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Cementing Deepwater, Low-Temperature Gulf of Mexico Formations Prone to Shallow Flows

Cited by 1 publication

References 0 publications

Mechanism and performance of a lithium chloride accelerator

Mechanism and performance of a lithium chloride accelerator

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