New Data on Heat flow for Modeling Areas of Hydrocarbon Systems of The Bazhenov and Domanik Formations

2021 
Summary The new experimental geothermal investigations of hydrocarbon systems of the Bazhenov and Domanik Formations are necessary for basin modeling as previous heat flow data have serious errors caused by drawbacks of traditional methods used for experiments. Two wells drilled in the Bazhenov and Domanik Formations (depth of 3202 and 3827 m correspondingly) were studied with advanced techniques that included the method of thermal core logging for thermal properties determination for 4102 and 1699 core samples correspondingly and a new method of thermal property prediction from standard well-logging data for intervals without coring. The measurements were also performed on as-received, dry and brine-saturated core plugs and in-situ conditions. Influence of technological fissuring was accounted for from variations in thermal conductivity components for different states of core plugs. The equivalent thermal conductivity was determined for different depth intervals taking estimated influence of anisotropy and PT-corrections into account. Detailed data on equilibrium temperature gradient along the wells were used. Essential vertical variations in heat flow along the wells were registered (by 55 and 25% correspondingly) and the terrestrial heat flow values were determined (87.1 and 74.4 W/(mK) correspondingly) that exceed significantly (by 65 and 120%) the averaged data published previously for these territories.
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