Pack options included STIMPAC fracturing and gravel-packing service, high-rate water pack, and gravel pack. Screenless options included screenless fracturing, selective perforations, oriented perforations, and formation or perforation chemical consolidation.
Based on the results of the study and past experience of sand control requirements in wells with increased production potential, the SMS team made the following recommendations for optimal completion:
- a high-rate water pack for wells with an oil/water contact
- STIMPAC service for wells with-out anticipated water contact
- the use of gravel or screens in wells with production rates of 5,000 bbl/d and higher
The study also included a full analysis on reperforating the wells for a pack environment to minimize the pressure drop and damage seen when packing small-diameter perforations. This option provided the maximum area open for flow in the casing and cement sheath with minimal perforation pressure drop.
Sand controlled, production rates increased
Based on SMS recommendations, a pack design was used for the six wells. Seven months into the project, the workovers had provided nearly 100% efficient gravel packs and sand control. Production rates increased with the application of a higher well drawdown pressure.
E-mail dcs@slb.com or contact your local Schlumberger representative to learn more.