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Title: Preparation of grout for stabilization of abandoned in-situ oil shale retorts

Abstract

A process for the preparation of grout from burned shale by treating the burned shale in steam at approximately 700.degree. 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.degree. 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.

Inventors:
 [1]
  1. (Livermore, CA)
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
864159
Patent Number(s):
4320994
Assignee:
United States of America as represented by United States (Washington, DC) LLNL
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
preparation; grout; stabilization; abandoned; in-situ; oil; shale; retorts; process; burned; treating; steam; approximately; 700; degree; maximize; production; materials; alite; larnite; removed; surface; retort; retorted; carbon; leaving; treated; 70; minutes; ground; mixed; water; produce; pumped; processed; flowing; void; spaces; bonding; form; rigid; solidified; mass; prevents; subsidence; leaching; spent; shale retorts; ground water; situ oil; shale retort; oil shale; spent shale; void space; burned shale; situ retort; surface subsidence; prevents surface; /405/106/299/

Citation Formats

Mallon, Richard G. Preparation of grout for stabilization of abandoned in-situ oil shale retorts. United States: N. p., 1982. Web.
Mallon, Richard G. Preparation of grout for stabilization of abandoned in-situ oil shale retorts. United States.
Mallon, Richard G. Fri . "Preparation of grout for stabilization of abandoned in-situ oil shale retorts". United States. https://www.osti.gov/servlets/purl/864159.
@article{osti_864159,
title = {Preparation of grout for stabilization of abandoned in-situ oil shale retorts},
author = {Mallon, Richard G.},
abstractNote = {A process for the preparation of grout from burned shale by treating the burned shale in steam at approximately 700.degree. 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.degree. 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1982},
month = {1}
}

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