- Title
- Development and application of laboratory-scale convergence measuring device in monitoring borehole condition
- Creator
- Heo, J.H.; Melkoumanian, S.; Hashemi, Sam
- Date
- 2017
- Type
- Text; Conference paper
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/183906
- Identifier
- vital:16376
- Abstract
- Considerable stability problems, such as weakening of the rock formation and borehole convergence, can occur when drilling into areas comprising a poorly cemented formation. In this study, a laboratory-scale convergence measuring device (CMD) has been developed based on the local deformation transducer (LDT) concept, and successfully applied in a series of laboratory tests to continuously monitor borehole deformation in synthetic thick-walled hollow cylinder (TWHC) specimens with various cement contents. Displacement measurements obtained from the CMD were calibrated against a digital micrometer. Calibration results showed that the performance of the CMD and the digital micrometer matched with high accuracy. TWHC test results showed that an increase in the cement content resulted in an increase in the deviatoric stress required to initiate a borehole convergence. Moreover, it was observed that the increment in the level of the deviatoric stress required for the borehole convergence initiation decreased, as the confining pressure increased. These findings can help design more appropriate support systems for drilling operations involving exploration boreholes, as well as oil and gas wellbores to improve the drilling performance in poorly cemented formations.
- Relation
- Paper presented at 52nd U.S. Rock Mechanics/Geomechanics Symposium;Seattle, Washington;June 17–20, 2018
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- Copyright ARMA U.S Rock Mechanics
- Subject
- Reservoir characterization; Wellbore design; Reservoir Characterization; Wellbore integrity; Borehole
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