On the problems of wells completion in complex conditions

Authors: S.A. Ananyev, F.R. Yakhshibekov (Surgutneftegaz OAO), V.D. Gorgots (Tyumen Branch of SurgutNIPIneft)
The complexity of deposits in the Lower Cretaceous, Jurassic, Triassic and Paleozoic sediments of Western Siberia increases with the depth significantly, in Eastern Siberia these problems appear much higher along the section. The basic problems and ways of their solution are given. One- and two-factor experiments can not solve the problems that have long ago appeared with increaing the complexity of geological conditions. Boreholes should be constructed along the safety profiles. Due to the fact that in the near future it has to mass drilling of wells in complex mining and geological conditions, the priority lines of Surgutneftegaz OAO scientific and technological development are determined as innovative lines of working out of perspective and reliable techniques and technology of wells construction in very complex conditions in Eastern, Western Siberia and Timan-Pechora oil-bearing province.


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