For today, most of major producing fields of Western Siberia are in the production decline phase. Reclamation of Turonian hard-to-recover gas reserves is becoming more relevant, currently it is not in commercial production.
The article is dedicated to justification of Turonian reservoir properties on Kharampurskoye field based on the well preproduction results (production, geophysics and well test data).
Turonian productive deposits are usually characterized by macro and micro heterogeneity, discontinuity of the net pay thickness and shale interlayers due to complicated lithology composition. Turonian reservoir is mainly represented by the clay fraction and fine-grained siltstone. The conditions of bedding and litho-facies characteristics explain the flow issues when bringing the reservoir into development, which makes it difficult to determine true reservoir properties.
The ultimate physical and optimal values of reservoir properties were proved based on the studying results. The performed work results allowed to estimate production potential and risks of projecting the reservoir development, and also to specify the accepted petrophysical relations, correct the action plan for well testing, it demonstrated the feasibility of an extensive set of geophysics methods and the need for alternative methods for their interpretation.
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