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Ways of solving the problem of injection wells casing in salt deposits at the license sites of Surgutneftegas OAO in the Republic of Sakha (Yakutia)

Authors: S.A. Ananyev, F.R. Yakhshibekov (Surgutneftegaz OAO), V.D. Gorgots (Tyumen Branch of SurgutNIPIneft)
It is shown, that the problem of salt deposits stabilization at the license areas and fields of Surgutneftegaz OAO in the Republic of Sakha (Yakutia) is in lack at least of a small impermeable interlayer of argillite or clays with thickness of 30-50 m for reliable fixing of string by tamping solutions and other technical facilities. The optimal conditions for research intake capacity of wells are determined. Other complicating factors in the producing and exploratory wells and some results of study on the water inrush model are given. Basis of the water inrush prevention on the casing string-borehole annuity in salt deposits is systematized. The results of experimental-field works are given.
It is shown, that the problem of salt deposits stabilization at the license areas and fields of Surgutneftegaz OAO in the Republic of Sakha (Yakutia) is in lack at least of a small impermeable interlayer of argillite or clays with thickness of 30-50 m for reliable fixing of string by tamping solutions and other technical facilities. The optimal conditions for research intake capacity of wells are determined. Other complicating factors in the producing and exploratory wells and some results of study on the water inrush model are given. Basis of the water inrush prevention on the casing string-borehole annuity in salt deposits is systematized. The results of experimental-field works are given.


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