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Strength prediction of Class G oilwell cement during early ages by electrical conductivity

Ridha, Syahrir and Irawan, Sonny and Ariwahjoedi, B. (2013) Strength prediction of Class G oilwell cement during early ages by electrical conductivity. Journal of Petroleum Exploration and Production Technology . ISSN 2190-0558

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Official URL: http://link.springer.com/article/10.1007%2Fs13202-...

Abstract

The compressive strength of oilwell cement plays an important role in securing the long-term integrity of wellbore. The cement’s strength development is experimentally difficult to perform once the cement has been displaced into the wellbore. Failure to monitor its development especially during early hydration may lead to secondary cementing operation or in the worst case may damage the well. This paper proposes an empirical equation for strength prediction of Class G oilwell cement using electrical conductivity at elevated pressure up to 3,000 psi and temperature up to 65 �C during the first 24 h of hydration. The study used both porosity–strength correlations and strength–electrical properties relationship to produce predictive equation for strength of oilwell cement. The proposed equation was experimentally compared to cement samples with different water–cement ratios and curing conditions to validate the result. A good agreement is achieved between the proposed equation and the measured data. Furthermore, the strength up to 50 days can be predicted by the proposed equation.

Item Type:Article
Subjects:T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
Academic Subject One:Academic Department - Petroleum Geosciences - Petroleum Engineering - Drilling and Well Construction - Well design and planning - Oilwell Cementing
Academic Subject Three:petroleum engineering
Departments / MOR / COE:Departments > Geoscience & Petroleum Engineering
ID Code:9883
Deposited By: Dr Syahrir Ridha
Deposited On:25 Oct 2013 01:56
Last Modified:20 Mar 2017 01:59

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