Extra-deep azimuthal resistivity improves navigation in a complex Barents Sea reservoir

摘要

Eni Norge operates Goliat field in the Barents Sea, offshore Norway, Fig. 1. The sand reservoirs are characterized by a large number of faults with relative high dip toward the flank of the structure. The faults are aligned into three main trends. Geo-chemical studies and formation pressure data clearly indicate lateral separation into several compartments. In addition, strati-graphic barriers reducing or preventing vertical communication have been identified within Kobbe. This challenging combination calls for horizontal production wells for effective drainage. A major challenge requires the 81/2-in. Goliat reservoir section to be initiated in the overlaying Snadd shale. To minimize shale exposure in the landing section, aggressive build-up rates are employed, reducing the length required in shale.