Research of Expanding Tamponing Compositions for Cementing of Oil and Gas Wells.

In the article the problem of improving the quality of demarcation of rocks and oil and gas-bearing horizons is analysed. The results of theoretical and experimental studies of expanding tamponing compositions based on mixtures of dolomite powder for mine construction (PDM) and tamponing Portland cement PCTI-100 are presented. New expanding tamponing compositions (ETC) based on mixtures of dolomite powder for mine construction of PDM and tamponing Portland cement PCTI-100 with density of 1710-1800 kg/m³ have been developed and researched. Components: dolomite powder for mine construction (PDM), tamponing Portland cement PCTI-100. The technological properties of tamping solutions based on ETC, the technological temperature modes of ETC hardening according to the criteria of strength, adhesion, gas permeability and expansion of cement stone, and corrosion resistance in aggressive environments were determined. The selection of optimal recipes of ETC was carried out. [ABSTRACT FROM AUTHOR]