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Kamenskikh S. V., Ulyasheva N. M.
Evaluation of the effect of buffer liquids on the intensity of destruction of filter cakes in casing

Ukhta State Technical University, Ukhta

The article deals with the problem of removal from the wall of the wellbore formed by drilling mud filter cake, which, on the one hand, greatly reduces further penetration of the flushing liquid into the reservoir, and on the other prevents a reliable separation of the seams while cementing casing. In the work conducted and presents the results of laboratory tests for the assessment of washing ability of different buffer liquids, including solutions of inorganic salts (electrolytes) with the addition of the stabilizer is CMC as using additional reagents (NTF and Atren SA), and without them. Based on the conducted experiments and investigated the dependence of the cleaning ability of buffer liquids of the type and concentration of drilling fluids, inorganic salts and additional reagents, etc.

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