Application Of New Methods In Drilling Of Complex Reservoirs Pkl9-20 Of Beregovoye Field
Drilling of horizontal wells onto complex geological formations with high compartmentalization, low reservoir properties (porosity and permeability), lateral variety and uncertainty may cause the loss of productive layer while drilling and non-fulfilment of planned production flow rates. In the worst cases invalid strategy of wells construction in such conditions with high geological leads to huge losses and ineffective capital expenses for Company. If we talked about construction of multilateral horizontal wells, the risks of specified failure increase significantly. However, there are methods, that can help on the planning stage of drilling significantly reduce potential losses and at most effectively achieve targeted indicators. In this article described two such methods: - Strategy of check points for kick-off procedures (in the case of loss of productive layer) for drilling well bore in alternative direction; - Strategy of advance pre-drilling of several pilot wellbores for definition and evaluation target interval for horizontal well drilling. The results of using of these methods on PKi9.2o reservoirs of Beregovoye field made it possible to increase effective drilling length on reservoir and improve starting production flow rate against planned figures. These strategies and methods highly recommended for use in complex wells and reservoirs in similar geological conditions as for gas and oil recovery.