Abstract:

Based on the thermal conductivity and pore connectivity differences between parallel and perpendicular to the bedding plane of argillaceous rock，siltstone，sandstone and dolostone of Zhanhua depression in Bohai Bay basin，we delineated the relationship between the thermal conductivity and the pore connectivity differences. According to the experimental results，the thermal conductivity parallel to the bedding plane of argillaceous rock，siltstone and sandstone are higher than that perpendicular to the bedding plane. And the thermal conductivity parallel to the bedding plane of dolostone is lower than that perpendicular to the bedding plane. Between parallel and perpendicular to the bedding planes of sedimentary rocks，it is positive correlation between  thermal conductivity difference and the pore connectivity difference. The thermal conductivity is higher in the direction that pore connectivity is better. And the thermal conductivity is lower in the direction that pore connectivity is poor.

Key words: Bohai Bay basin, Zhanhua depression, sedimentary rock, parallel to bedding plane, perpendicular to bedding plane, thermal conductivity, pore connectivity