Commercial production from the thinly-laminated Turonian deposits of North West Siberia has been proven in many wells. But despite the fact that we see these layers in many fields and they are in fact the primary development target, the reservoir properties are not well studied and thus their ultimate potential is unclear. To date, the obstacle has been the sand shale laminations that we encounter are on the order of a few millimeters to even fractions of a millimeter thick. Standard log interpretation method have proven to be inadequate, including the application of the latest deconvolution techniques of using a high resolution measurement such as a microimager to inform the layering of standard resolution devices. Even core analysis is ambiguous due to the heterogeneous and anisotropic nature of the reservoirs. In this paper we discuss a complete method of analyzing these thinly-laminated layers with a view to resolving a fuller petrophysical understanding.

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