Russian field tests yield cements for arctic wells

Field tests of arctic cements in the Bovanenkovo gas-condensate field on the Yamal peninsula in northern Russia will benefit an upcoming drilling program.Oil and gas fields of Russia are being developed in the harsh climatic and geological conditions of the extreme north and Arctic seas shelf.The complicated geological conditions include permafrost, intrapermafrost water, upper gas flowing horizons (100-150 m), and soft rocks with low-fracture gradients (0.0150-0.0160 MPa/m).Low temperatures can cause certain energetic and kinetic deviations during the hydration of hardening cement in contrast to hydration at normal temperatures. Decreasing temperature retards hydration of clinker mineral...

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