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Thermal conductivity of the Bazhenovo Formation rocks in the Salym area (West Siberian Plate)
Institution:1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Sichuan 610059, China;2. Northwest Petroleum Bureau of Sinopec, Xinjiang 830011, China;3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Sichuan 610500, China;4. Teaching and Research Office of Oil and Gas Engineering, Ufa State Petroleum Technological University, Ufa, 450062, Russian;5. Department of Geology, University of Regina, Regina, s4s 3x3, Canada;1. V.S. Sobolev Institute of Geology and Mineralogy, Siberian Branch of the Russian Academy of Sciences, pr. Akademika Koptyuga 3, Novosibirsk, 630090, Russia;2. Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090, Russia;3. A.P. Karpinsky All-Russian Research Geological Institute, Srednii pr. 74, St. Petersburg, 199106, Russia;1. School of Mining Engineering, College of Engineering, Campus II, University of Tehran, Junction of Jalal-e-al-e-ahmad and North Kargar str., P.O.Box 14395-515, Tehran, Iran;2. School of Electrical and Computer Engineering, Control and Intelligent Processing Center of Excellence, College of Engineering, Campus II, University of Tehran, Junction of Jalal-e-al-e-ahmad and North Kargar str., P.O.Box 14395-515, Tehran, Iran
Abstract:We discuss the results of measurements of the thermal conductivity of the Bazhenovo Formation rocks from wells drilled in the Salym petroliferous area of the West Siberian Plate. The thermal conductivity was measured by “Thermal-conductivity comparator” and “Scanning thermal-conductivity meter” in different years. A total of 225 measurements were made in two directions with respect to the rock layering: parallel (λ1) and orthogonal (λ2). The results show that the Bazhenovo Formation rocks are mostly of abnormally low thermal conductivity: λ1 = 1.0–2.3 W/(m⋅K) (average is 1.6 W/(m⋅K)) and λ2 = 0.8–1.9 W/(m⋅K) (average is 1.3 W/(m⋅K)). This leads to an abnormal increase in geothermal gradient within the Bazhenovo Formation. Such geothermal-gradient anomalies can be easily revealed by high-precision thermal logging. It is also shown that the thermal conductivity of the studied rocks is in inverse relationship with their organic-matter content.
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