The results of the lithologo-petrophysical studies of the wells of the Srednebotuobinskoye field are given. Dependence of reservoir properties from sedimentary and postsedimentary factors was revealed. As a result the assumption about shallow sandbar genesis of botuobinskiy sandstones was proved. Petrophysical and lithologic analysis presents influence of cement on the reservoir properties. Postsedimentary processes had a greater influence on origin of reservoirs then sedimentary ones.