Foamed Cementing Geothermal 13 3/8-in. Intermediate Casing: NGP #61-22
- Key words
- Foamed Cement, microspheres, lightweight, ductility, thermal conductivity, cost savings
- Location
- Blue Mountain, Nevada
- Conference
- World Geothermal Congress
- Year
- 2010
- Session
- 21. Drilling and Completion Technology
- Language
- English
- Paper number
- 2139
Full text
533KB, opens in a new tab
Abstract
Geothermal wells in the Blue Mountain area of Nevada have experienced problems caused by losses during primary cementing of well casings, often requiring top jobs to complete. Conventional cement designs were not effective in solving the problem. Also, as deeper casing setting depths were required because of reservoir characteristics, the risk of not achieving good cement jobs increased. Analysis of cement jobs in this geothermal field led to the need for developing nontraditional cement designs. This paper documents the analysis, planning, and execution of foamed-cementing operations used to successfully perform primary 13 3/8-in. casing cement work. Previous cementing practices are presented, as well as the advantages and design of foamed cementing for this application. A post-job analysis and cost comparison of foamed versus conventional cementing is also presented.
Copyright 2010, International Geothermal Association. Readers who download papers from this site should honour the copyright of the original authors, and may not copy or distribute the work further without the permission of the original publisher.