Is your well suitable for controlled pressure drilling? Screening methodology could help you decide

摘要

CONTROLLED PRESSURE drilling (CPD) is an adaptive drilling process that enables a more precise control of wellbore pressures. It is becoming an important tool for drilling aging fields with depleted reservoirs, narrow pressure windows and/or drilling issues. Improvements stem from mitigating common drilling hazards that are caused by lost circulation, kick/loss scenarios, sour-gas influx, or simply slow drilling through hard formations. The drilling process can provide a variety of benefits during the drilling operation and production phase; however, it can fail to deliver full potential because unsuitable candidate wells are drilled or the inappropriate drilling technology is applied. An important aspect of CPD success is proper candidate screening, which can provide an understanding of benefits and risks.