Schlumberger

Industry Article: Mobility Steering Helps Place Injectors

Publication: Offshore
Publication Date: 08/01/2009

The use of formation-pressure-while-drilling (FPWD) to optimize well placement above a heavy oil zone has become a very useful procedure for Saudi Aramco.

One of Saudi Arabia’s giant carbonate oilfields is in a northwest to southeast trending anticlinal structure. Most of the field is offshore and is accessed by land-based directional wells with extended lateral legs. Production opportunities exist in the presence of formation heterogeneity and a less mobile to immobile heavy oil layer between the aquifer (that would normally drive production) and the zones above it. The heavy crude layer is viscous and affects the ability of the natural water drive to energize the flow of oil to the surface.



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