Research on cements for geothermal and deep oil wells
Conference
·
OSTI ID:7311806
In present research, some of the indicated low strength of hot well cements was related to the CaO/SiO/sub 2/ ratio and the amount of Al/sub 2/O/sub 3/. An optimum composition was 5CaO:6SiO/sub 2/ plus 7 percent Al/sub 2/O/sub 3/. The Al/sub 2/O/sub 3/ stabilized tobermorite to about 250/sup 0/C (482/sup 0/F) without which serious strength loss occurred. Another possibly favorable composition was 2CaO:3(SiO/sub 2/+Al/sub 2/O/sub 3/) provided at least 5 percent Al/sub 2/O/sub 3/ was available in the cement. Six hydrated calcium silicates were found as potential binders in the study. The effect of Al/sub 2/O/sub 3/, ranging from beneficial to deleterious, was determined for all.
- OSTI ID:
- 7311806
- Report Number(s):
- CONF-761008-172
- Country of Publication:
- United States
- Language:
- English
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