REFINING THE SPACE POSITION OF THE LOWER BOUNDARY OF BOTUOBINSKY PRODUCTIVE HORIZON IN CHAYANDINSKOE OIL AND GAS CONDENSATE FIELD
A possible presence of washout surfaces under Botuobinsky sandstones in Chayandinskoe fi eld is being analyzed. The correlation diagrams, lithologic facies profi le, micro- and macro-descriptions of the core in some wells unambiguously suggest that there is no unconformity in the bottom of the Botuobinsky sandstones. As it follows from the above, an adequate geologic simulation of the Chayandinskoe oil and gas condensate fi eld requires necessary continuation of the surveys conducted.