Turbo drilling through coil tubing using foam in sub-hydrostatic well: a case history for jotana field in cambay basin, india

摘要

Several sub-hydrostatic wells have the problem of declining production due to build up of consolidation of produced sand fill and heavy scale deposits in the 5 1/2" or 7 1/2" casing. Conventional Coil Tubing operation using high pressure jetting failed to clear the hard deposits. To meet this challenge innovative idea of Foam TURBO DRILLING with Coil Tubing was successfully carried out for the first time in oil fields of India. In the process 70