Utilization of low BTU gas generated during in situ heating of organic-rich rock

摘要

A method for utilizing gas produced from an in situ conversion process is provided. The method may include heating an organic-rich rock formation, for example an oil shale formation, in situ. The method may further include producing a production fluid from the organic-rich rock formation where the production fluid having been at least partially generated as a result of pyrolysis of formation hydrocarbons, for example oil shale, located in the organic-rich rock formation. The method may include obtaining a gas stream from the production fluid, where the gas stream comprises combustible hydrocarbon fluids. The method may include separating the gas stream into a first composition gas stream and a second composition gas stream, where the composition of the first composition gas stream is a low BTU gas stream maintained in a substantially constant condition and passing the first composition gas stream through a first gas turbine to form a first gas turbine exhaust stream, where the first gas turbine being configured to provide energy to a first electrical generator.