The novel bio-mineralization technology developed by BioSqueeze has been demonstrated as providing an effective solution for eliminating methane leaks in oil and gas wells: saving time and money otherwise spent on unsuccessful remediation attempts. One of the rare SBIR Awards to go directly to Phase II in a dollar amount in excess of $4M, the firm is an acknowldged leader in commercial biomineralization, BioSqueeze utilizes natural soil bacteria delivered via low-viscosity, self diverting fluids to form calcium carbonate (limestone) - an approach that steadily reduces permeability to create a permanent, gas-tight seal. Acknowledged as a (the) world leader in commercial biomineralization, the firm is utilizing natural soil bacteria delivered via low-viscosity, self diverting fluids to form calcium carbonate (limestone), steadily reducing permeability to create a permanent, gas-tight seal. The achieved capability is demonstrated as effective - and environmentally friendly - as well as having various and several other andrelated applications: leak sealing, enhanced oil recovery, soil stabilization, and infrastructure repair.