Seeing fractures under a Microscope - the first application of the new microimager while drilling in WBM in Russia

NDP «Chepakovskoe» uses advanced logging while drilling technologies for studying the fracturing of Paleogene reservoirs of Chepakovskoye oil field (Stavrovol region). High-resolution microimager while drilling in horizontal well provide new information of complex structure of the Paleogene deposits which cannot be unambiguously characterized by standard logging methods. For example, wide development of natural fracturing according to core data cannot be taken into account according to the standard logging complex. At the same time, the data of high-resolution images made it possible to significantly detail the structural elements of the reservoir, to characterize the natural and drilling-induced fracturing of the rock. Main attention in this article is given to the analysis of fracturing of reservoir horizons, estimating of fracture density (frequency) along the wellbore and the determination of fracture aperture.