Study produces supercement for annular seal and long-term integrity in deep, hot wells

摘要

EXPLORATION FOR NATURAL gas shifts more and more to deeper reservoirs. Encouraging finds and increased demand reinforce the push for drilling wells with target for mations deeper and deeper underground in hotter, higher-pressure conditions. This trend presents many obstacles in drilling, completion and production from these deep wells in high-pressure, high-temperature (HPHT) environments. Durability of annular seals created using Portland cement ranks high on this list of obstacles. Harsh conditions, huge investment cost of well construction, and high cost of seal remediation in these harsh, remote environments increase the necessity for annular seal durability.