Abstract
Summary The main goals of oil field study are risks reduction during appraisal and exploration stage and uncertainty decreasing during exploration and development stages. Software module (patent name is KOGI, English equivalent of this abbreviation is CESI), which based on methodology of complex exploration state estimation (CESI), is a digital tool for identifying zones of insufficient researches. Consequently, these are zones of high risk and uncertainty in terms of STOIIP calculation and planning future investigations. Methodology is still developing and it is in process adding qualitative features of productive formations (such as complexity, architecture aspects etc.) as well as value of information (VOI) getting from studies.
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