«Proceedings of Gubkin University»

Complications during drilling of saline deposits of the Kungursky tier of the Volgograd Volga region

UDC: 622.24
DOI: -

Authors:

¹ RITEK, Volgograd, Russian Federation
² Volgograd State Technical University, Volgograd, Russian Federation

Keywords: borehole drilling, caving formation, drilling complications, salt-containing rocks, construction of wells in salt-bearing deposits, bischofite, Volgograd left bank

Annotation:

Drilling and casing of wells in conditions of saline rocks is quite often accompanied by concomitant complications, one of these being cavern formation associated with high solubility of bischofite. The large diameter of the caverns creates conditions for uneven narrowing of the walls of the well, as a result of which unilateral loading of the column and its bending under the action of a transverse force can occur. In addition, the immeasurable diameter of the caverns does not allow calculating the required volume of cement for reliable casing. Therefore, the development of methods to minimize risks when drilling and casing wells in salt deposits is an urgent task. The article presents the results of the development of methods that ensure high-quality drilling and casing of wells in conditions of saline rocks of the Volgograd left bank.

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