Rejuvenating Field Production through Horizontal Wells in Unfavourable Mobility and Strong Aquifer Environment - a Case History

摘要

Maximization of recovery from multilaye red, viscous and highly heterogeneous oil fields is a challenging task for operators. Heglig oil field is located in M uglad basin of Sudan wherein oil accumulation is found in multiple layers of late cretaceous deposits. The formations are heterogeneous, unconsolidated with higher viscosity and strong aquifer support. Some formations are tighter too. Field was initially developed with commingly completed vertical wells with a wider well spac ing. ESP and PCP are in app lication for lifting the oil. Current development & production strategies and concepts implemented in the field resulted into exponential rise of water cut which reached to 90% within 10 years of production. This behavior is resulting into sharp decline of oil production and causing significant bypassed oil.