Lithological and petrographical core samples analysis of ecological and hydrogeological wells

The article is concerned with the results of the reservoir properties analysis of core samples from Sakmarian, Ufimian and Kazanian deposits (chronostratigraphic analogues of ICS: Sakmarian, Upper part of Kungurian, Roadian deposits). Core samples were selected by drilling and testing observation wells in heavy oil deposits localization to research hydrogeological conditions.
Materials and methods
Results of separation and handling of core samples from observation wells were taken from nine perspective structures with highviscosity oil for hydro monitoring of ground waters. Intervals of selected core samples were correlated with intervals of observation wells, essential characteristics for evaluation of reservoir qualities were selected. Core sample analysis of oilfields with high viscosity oil upon bore log and areal limit was done.
Results
Absorption zones, located above crest of reservoir section, are considered to be the most probable area for migration of the coolant outside the steam pocket in operation of superviscous oil field’s development. The results of actual researches indicate predominate localization of such reservoirs as water-bearing formation in Lower Kazanian water-bearing carbonate-terrigenous complex.
Сonclusions
Researching core samples in operation of observation well drilling (ecological and hydrogeological) with analysis of lithological and petrographical characteristics provides:
• the detailed, layer by layer, ecological and hydrogeological research of high-viscosity oilfields;
• it is necessary to use information for planning and extending system of hydromonitoring for observation well-drilling;
• to use reservoir characteristics for ground waters and oilfields of high-viscosity oil protection by steam-heat methods.