High temperature effects on rock physical properties of organic-rich shale

XIONG Jian; LIN Haiyu; LIU Xiangjun; LIANG Lixi; HUANG Hong; LI Xiansheng

doi:10.11781/sysydz201906910

Volume 41 Issue 6

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XIONG Jian, LIN Haiyu, LIU Xiangjun, LIANG Lixi, HUANG Hong, LI Xiansheng. High temperature effects on rock physical properties of organic-rich shale[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(6): 910-915. doi: 10.11781/sysydz201906910

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XIONG Jian, LIN Haiyu, LIU Xiangjun, LIANG Lixi, HUANG Hong, LI Xiansheng. High temperature effects on rock physical properties of organic-rich shale[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2019, 41(6): 910-915. doi: 10.11781/sysydz201906910

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High temperature effects on rock physical properties of organic-rich shale

doi: 10.11781/sysydz201906910

1. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
2. Southwest Branch, CNPC Logging Company Limited, Chongqing 400021, China

Received Date: 2019-08-06
Rev Recd Date: 2019-10-15
Publish Date: 2019-11-28

Abstract

Abstract

The Longmaxi Formation shale in the Sichuan Basin was used to study the changing physical properties of shale after high temperature treatment and the influences of high temperature on the rock mechanical properties of shale. As the temperature increases, the color of shale specimens gradually changes from black to gray. The quality of shale samples decrease slowly first and then rapidly with the increase of temperature, but the porosity and permeability increase slowly at first and then rapidly. The significant changes in quality, porosity and permeability indicate that there is a threshold temperature in this process, and the threshold temperature of the Longmaxi Formation shale range from 300 to 400℃. With the increase of temperature, the acoustic time difference of longitudinal wave and shear wave decreases, while the attenuation coefficient of longitudinal and shear wave increases. With the increase of temperature, the uniaxial compressive strength and the elastic modulus of shale samples decrease, while changes in Poisson's ratio are not obvious.
- high temperature,
- rock physical property,
- mechanical property,
- shale,
- Longmaxi Formation,
- Lower Silurian,
- Sichuan Basin

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References(22)

References

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High temperature effects on rock physical properties of organic-rich shale

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