SOLIDIFICATION OF WASTE BRINE FROM IN SITU HYDROCARBON RECOVERY OPERATIONS

摘要

There is provided a process and solidification formulation for treating waste brines derived from a thermal in situ hydrocarbon recovery operation. The waste brines can be from a SAGD operation, a crystallizer blowdown stream, an evaporator blowdown stream, and/or an OTSG blowdown stream. The process includes addition of the solidification formulation to the waste brine to produce a solidified waste that can be disposed of in landfills. The solidification formulation can be prepared according to the chemical characteristics of the waste brine. The solidification formulation added to the waste brine can include fly ash having high carbon content, such as fly ash derived from petroleum-coke. Calcium-containing compounds and silica-containing compounds can also be included in the solidification formulation.