EFFECT OF THE MATURATION PRESSURE ON MECHANICAL AND HYDRAULIC PROPERTIES OF OILWELL CEMENT PASTE

Author(s): Issam Takla (1), Nicolas Burlion (1), Jian-Fu Shao (1), Thomas Rougelot (1)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 689-694
Total Pages: 6
Language : English

Abstract: Oilwell cement (G class) is commonly used for the cementing works in the boring operations. The cementing aims to place a ring of cement paste between the wall of the drilled hole and the tubing.
The maturation of oilwell cement takes place at high temperatures and under pressures higher than the pressure at the surface. Within the framework of a general project for the sequestration of CO2 in oil reservoirs developed by Total Exploration and Production (E&P), this study aims to investigate the effects of pressure during the maturation of G class cement on its mechanical and hydraulic properties.
All tests were performed at a temperature of 90°C (real temperature of the well) for two different maturations of the cement paste: under atmospheric pressure or under a pressure of 3000 psi (20.7 MPa) usually reached in oilwells. Porosity, permeability and mechanical strength were measured and analysed. A very slight difference between the two types of maturation was observed: the kinetic effect of curing pressure at early age seems to be concealed on the long term if a sufficient hydration time is guaranteed.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00