TY - SER AU - Deeg,Wolfgang AU - Griffith,James AU - Crook,Ron AU - Bengs,Glen AU - Griffith,James AU - Crook,Ron AU - Bengs,Glen TI - How foamed cement advantages extend to hydraulic fracturing operations: Special properties of low-density, foamed cement sheaths around and between perforated casing strings allow them to resist initiation/propagation of sheath fracturing and fluid migration during high-pressure stimulations ER -