Method and system for determining thermal conductivity of rock

Abstract

The embodiment of the invention discloses a method and system for determining the thermal conductivity of rock. The method includes the steps of putting a first core sample and a second core sample into a reaction kettle, and carrying out constant-temperature heating on the reaction kettle through a heating furnace and carrying out pressurization on the reaction kettle through a hydraulic device so as to make the temperature and the pressure in the reaction kettle reach a specified temperature and a specified pressure respectively; carrying out pulse heating on a thermal element arranged between the first core sample and the second core sample through a pulse heating device; collecting temperature data of the thermal element obtained after pulse heating through a data collecting device, and according to the temperature data, determining the thermal conductivity of an original core sample at the specified temperature and the specified pressure. By means of the technical scheme, the thermal conductivity of the core sample under geological conditions can be effectively determined.

Description

technical field [0001] The present application relates to the technical field of in-situ heating, upgrading and mining in petroleum exploration, in particular to a method and system for determining the thermal conductivity of rocks. Background technique [0002] In recent years, shale oil and gas has gradually become the focus of exploration and research in the field of unconventional oil and gas at home and abroad. Compared with typical shale oil plays in North America (Ro>1.1%), the maturity of lacustrine shale in China is generally lower, in the Oil window range (0.6%<Ro<1.1%). In view of the geological characteristics of China's shale, such as low maturity, large hydrocarbon generation potential, wide area distribution, many layers, and large resource potential, many scholars and institutions believe that foreign in-situ upgrading technologies may be the key to realizing shale oil production in China. efficient way to mine. How to effectively evaluate the dist...

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Problems solved by technology

These thermal conductivity test methods are limited by temperature and pressure conditions, making it impossible to carry out high temperature and high pressure tests

Among them, the thermal conductivity cannot be directly measured by the hot plate method and the laser method, but the thermal conductivity can only be calculated through the combination of thermal diffusivity and specific heat, and the test pressure can only be normal pressure; while the test temperature of the hot wire method can only be Normal temperature, pressure is also limited to normal pressure

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