AIR AND GAS DRILLING SUCCEEDED IN NORTHEASTERN SICHUAN

摘要

On January 21, 2006, air and gas deep well drilling test was successfully carried out in the Sinopec southern exploration area. Lingering problems pestering deep well drillings in the southern marine facies area like low drilling rate and prolonged drilling periods were well resolved: average drilling rate of conventional drilling is about 1.4 meters per hour with drilling period (above Xujiahe Formation) of about 130 days, whereas it took only 22 days to complete the same task by air and gas drilling, with penetration rate increased more than eightfold.