Simulation of the degradation of oilwell cement for the prediction of long-term performance
| dc.contributor.author | Zuo, Z. | |
| dc.contributor.author | Bennett, T. | |
| dc.date.issued | 2019 | |
| dc.description.abstract | The cement sheath surrounding a wellbore forms an important barrier to maintain well integrity beyond the service life of a well. The understanding of the potential degradation of well cement, as a result of exposure to groundwater, is therefore necessary to determine if this barrier remains intact or remedial action is required at some time in the future. A reactive transport model of a well cement is developed and calibrated to accelerated laboratory tests. The calibrated model of cement is subsequently exposed to different groundwater compositions for a simulated time period of 1000 years. The results of these simulations demonstrate that the groundwater composition affects the long term degradation through the dissolution of portlandite and C-S-H. The precipitation of calcite has a protective effect by filling the pore space and subsequently reducing the intrusion of aggressive aqueous species in the surrounding formation. | |
| dc.description.statementofresponsibility | Zhongcun Zuo, Terry Bennett | |
| dc.identifier.citation | Construction and Building Materials, 2019; 202:669-680 | |
| dc.identifier.doi | 10.1016/j.conbuildmat.2019.01.062 | |
| dc.identifier.issn | 0950-0618 | |
| dc.identifier.issn | 1879-0526 | |
| dc.identifier.orcid | Bennett, T. [0000-0002-3979-769X] | |
| dc.identifier.uri | http://hdl.handle.net/2440/126666 | |
| dc.language.iso | en | |
| dc.publisher | Elsevier | |
| dc.rights | © 2019 Elsevier Ltd. All rights reserved. | |
| dc.source.uri | https://doi.org/10.1016/j.conbuildmat.2019.01.062 | |
| dc.subject | Long-term performance; oil well cement; corrosion modelling | |
| dc.title | Simulation of the degradation of oilwell cement for the prediction of long-term performance | |
| dc.type | Journal article | |
| pubs.publication-status | Published |