Preparation of grout for stabilization of abandoned in-situ oil shale retorts. [Patent application]
A process is described for the preparation of grout from burned shale by treating the burned shale in steam at approximately 700/sup 0/C to maximize the production of the materials alite and larnite. Oil shale removed to the surface during the preparation of an in-situ retort is first retorted on the surface and then the carbon is burned off, leaving burned shale. The burned shale is treated in steam at approximately 700/sup 0/C for about 70 minutes. The treated shale is then ground and mixed with water to produce a grout which is pumped into an abandoned, processed in-situ retort, flowing into the void spaces and then bonding up to form a rigid, solidified mass which prevents surface subsidence and leaching of the spent shale by ground water.
- DOE Contract Number:
- W-7405-ENG-48
- Assignee:
- Dept. of Energy
- OSTI ID:
- 6891094
- Country of Publication:
- United States
- Language:
- English
Similar Records
Preparation of grout for stabilization of abandoned in-situ oil shale retorts
Control strategies for abandoned in situ oil shale retorts