Straits of Tartar, NW coast of Sakhalin Island - Russia - 1998
The 545 sq km survey reveals the prospect potential of the Astrakhanov structure
The survey was acquired over the Astrakhanov prospect North Sakhalin Island, believed to have significant hydrocarbon potential. The survey covers a very large Upper Miocene-Pliocene compressional anticline, which is heavily compartmentalized. The well, drilled on 2D data, missed the prospect.
The Astrakhanov structure represents a complicated compressional anticline of Pliocene age. In contrast to most of the other discoveries along the Sakhalin shelf, the reservoir comprises of thick and homogenous shallow marine sandstones of Early Miocene age.
The dataset was reprocessed in 2007 using modern pre-stack imaging to reveal the complexity of the fault system, with emphasis on evaluating the remaining hydrocarbon potential. A detailed interpretation report is available.