Keywords and Phrases
Casing Imager; CO2 Sequestration; Distributed Coaxial Cable Sensor; Permanent Downhole Monitoring; Wellbore Integrity; Well Tubular Deformation
"Downhole monitoring plays a crucial part in geological carbon dioxide (2) sequestration. Various downhole monitoring technologies have been explored and applied, but they are either expensive or have system longevity issues. To address this issue, a robust and cost-effective downhole sensing system based on distributed coaxial cable sensors is developed and evaluated in laboratory, and a numerical simulation with staged finite element model is conducted to study the feasibility of using the coaxial cable sensing system for monitoring and evaluation of wellbore stability during CO2 injection.
The real-time distributed sensing system is composed of Fabry-Perot interferometer based coaxial cable temperature and strain sensors. A high pressure high temperature (HPHT) sensor testing system is developed to study the temperature sensor accuracy, sensitivity, stability, hysteresis, and crosstalk effect under simulated downhole conditions. A lab-scale prototype of the casing imager based on strain sensors is developed and tested in laboratory to prove its real-time monitoring ability in casing axial compression, radial expansion, bending, and ovalization. A parametric study with staged finite element analysis is conducted to study the feasibility of using the casing imager in wellbore stability monitoring and evaluation during CO2 injection in the Weyburn field.
The system is proved to perform under 1,000 psiaand 110 ⁰C, with real-time monitoring ability in casing axial compression, radial expansion, bending, and ovalization. And the parametric study with finite element model not only proved the feasibility of using the system for wellbore stability monitoring and evaluation during CO2 injection in the Weyburn field, but also provided insight into the best cementing practice and injection conditions as guidance to avoid leakage risks in a geologic CO2 sequestration project"--Abstract, page iv
Xiao, Hai, Dr.
Geosciences and Geological and Petroleum Engineering
Ph. D. in Petroleum Engineering
United States. Department of Energy
Missouri University of Science and Technology
Journal article titles appearing in thesis/dissertation
- Laboratory evaluation of distributed coaxial cable temperature sensor for application in CO2 sequestration well characterization
- Development and evaluation of the coaxial cable casing imager--A cost-effective solution to real-time downhole monitoring for CO2 sequestration wellbore integrity
- Feasibility of real-time evaluation of the CO₂ sequestration wellbore integrity with the coaxial cable casing imager
xv, 110 pages
Weyburn, Saskatchewan, Canada
© Yurong Li
Dissertation - Open Access
Library of Congress Subject Headings
Geological carbon sequestration -- Saskatchewan -- Weyburn
Injection wells -- Testing
Electronic OCLC #
Li, Yurong, "Development and evaluation of a coaxial cable sensing system for CO2 sequestration wellbore integrity monitoring" (2016). Doctoral Dissertations. 2540.