Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries

Handle URI:
http://hdl.handle.net/10754/625899
Title:
Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries
Authors:
Nair, Sriramya D.; Patzek, Tadeusz ( 0000-0002-9389-7579 ) ; van Oort, Eric
Abstract:
There has been growing interest in the use of magnetorheological fluids to improve displacement efficiency of fluids (drilling fluids, spacer fluids, cement slurries) in the eccentric casing annuli. When magnetic particles are mixed with the cement slurry for improved displacement, they provide an excellent opportunity for sensing the presence and quality of cement in the annulus. This work focuses on using sophisticated 3D computational electromagnetics to simulate the use of a magnetic cement slurry for well cement monitoring. The main goal is to develop a new tool, which is capable of locating magnetic cement slurry that is placed behind a stainless steel casing. An electromagnetic coil was used to generate a magnetic field inside the borehole. It was found that when a current was passed through the electric coils, magnetic field lines passed through the stainless steel casing, the cement annulus and the rock formation. Three sensors were placed inside the cased borehole and the magnetic field strength variations were observed at these locations. Various factors that have a significant influence on zonal isolation were considered. These include, effect of debonding between casing and cement annulus, effect of changing annuli thickness, influence of a fracture in the rock formation, effect of changing magnetic permeability of cement and finally influence of annuli eccentricity. Based on the results shown in the paper along with the next generation of supersensitive magnetic sensors that are being developed, the magnetic approach appears to be a viable alternative for evaluating the quality of the cement annulus to ensure good zonal isolation.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program; Ali I. Al-Naimi Petroleum Engineering Research Center (ANPERC)
Citation:
Nair SD, Patzek TW, van Oort E (2017) Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries. SPE Annual Technical Conference and Exhibition. Available: http://dx.doi.org/10.2118/187047-ms.
Publisher:
Society of Petroleum Engineers
Journal:
SPE Annual Technical Conference and Exhibition
Issue Date:
2-Oct-2017
DOI:
10.2118/187047-ms
Type:
Conference Paper
Additional Links:
https://www.onepetro.org/conference-paper/SPE-187047-MS
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program; Upstream Petroleum Engineering Research Center (UPERC)

Full metadata record

DC FieldValue Language
dc.contributor.authorNair, Sriramya D.en
dc.contributor.authorPatzek, Tadeuszen
dc.contributor.authorvan Oort, Ericen
dc.date.accessioned2017-10-18T11:40:59Z-
dc.date.available2017-10-18T11:40:59Z-
dc.date.issued2017-10-02en
dc.identifier.citationNair SD, Patzek TW, van Oort E (2017) Detecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurries. SPE Annual Technical Conference and Exhibition. Available: http://dx.doi.org/10.2118/187047-ms.en
dc.identifier.doi10.2118/187047-msen
dc.identifier.urihttp://hdl.handle.net/10754/625899-
dc.description.abstractThere has been growing interest in the use of magnetorheological fluids to improve displacement efficiency of fluids (drilling fluids, spacer fluids, cement slurries) in the eccentric casing annuli. When magnetic particles are mixed with the cement slurry for improved displacement, they provide an excellent opportunity for sensing the presence and quality of cement in the annulus. This work focuses on using sophisticated 3D computational electromagnetics to simulate the use of a magnetic cement slurry for well cement monitoring. The main goal is to develop a new tool, which is capable of locating magnetic cement slurry that is placed behind a stainless steel casing. An electromagnetic coil was used to generate a magnetic field inside the borehole. It was found that when a current was passed through the electric coils, magnetic field lines passed through the stainless steel casing, the cement annulus and the rock formation. Three sensors were placed inside the cased borehole and the magnetic field strength variations were observed at these locations. Various factors that have a significant influence on zonal isolation were considered. These include, effect of debonding between casing and cement annulus, effect of changing annuli thickness, influence of a fracture in the rock formation, effect of changing magnetic permeability of cement and finally influence of annuli eccentricity. Based on the results shown in the paper along with the next generation of supersensitive magnetic sensors that are being developed, the magnetic approach appears to be a viable alternative for evaluating the quality of the cement annulus to ensure good zonal isolation.en
dc.publisherSociety of Petroleum Engineersen
dc.relation.urlhttps://www.onepetro.org/conference-paper/SPE-187047-MSen
dc.rightsArchived with thanks to SPE Annual Technical Conference and Exhibitionen
dc.titleDetecting Poor Cement Bonding and Zonal Isolation Problems Using Magnetic Cement Slurriesen
dc.typeConference Paperen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEarth Science and Engineering Programen
dc.contributor.departmentAli I. Al-Naimi Petroleum Engineering Research Center (ANPERC)en
dc.identifier.journalSPE Annual Technical Conference and Exhibitionen
dc.eprint.versionPost-printen
dc.contributor.institutionThe University of Texas at Austinen
kaust.authorPatzek, Tadeuszen
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