Chemical blowing agents for improved sweep efficiency

摘要: A process for generating gas in-situ where a decomposable chemical blowing agent is utilized in combination with an aqueous medium. When slug of the medium containing said injected into formation, heat from coinjected activators, reservoir fluids, or formation mineralogy causes to decompose thereby gas. This forms bubbles which close pores more permeable zone drive fluid be diverted less removal hydrocarbonaceous fluids therefrom. Bubbles can also formed by incorporating water thickening amount soluble polymer gel agent. foam made placing medium, surfactant and In-situ generated used divert formation's zone.