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Zhenqi Guo, Tao Liu, Lei Guo, Xiuting Su, Yan Zhang, Sanpeng Li. An experimental study on microscopic characteristics of gas-bearing sediments under different gas reservoir pressures[J]. Acta Oceanologica Sinica.
Citation: Zhenqi Guo, Tao Liu, Lei Guo, Xiuting Su, Yan Zhang, Sanpeng Li. An experimental study on microscopic characteristics of gas-bearing sediments under different gas reservoir pressures[J]. Acta Oceanologica Sinica.

An experimental study on microscopic characteristics of gas-bearing sediments under different gas reservoir pressures

Funds:  The Shandong joint funds of National Natural Science Foundation of China under contract No. U2006213; the Fundamental Research Funds for the Central Universities under contract No. 201962011; the grant of Laboratory for Marine Geology, Pilot National Laboratory for Marine Science and Technology (Qingdao) under contract No. MGQNLM-KF201804.
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  • Gas-bearing sediments are widely distributed in five continents all over the world. Most of the gases exist in the soil skeleton in the form of discrete large bubbles. The existence of gas-phase may increase or decrease the strength of the soil skeleton. So far, bubbles’ structural morphology and evolution characteristics in soil skeleton lack research, and the influence of different gas reservoir pressures on bubbles are still unclear. The micro characteristics of bubbles in the same sediment sample were studied using an industrial CT scanning test system to solve these problems. Using the image processing software, the micro variation characteristics of gas-bearing sediments in gas reservoir pressure change are obtained. The results show that the number and volume of bubbles in different equivalent radius ranges will change regularly under different gas reservoir pressure. With the increase of gas reservoir pressure, the number and volume of tiny bubbles decrease. In contrast, the number and volume of large bubbles increase, and the gas content in different positions increases and occupies a dominant position, driving the reduction of pore water and soil skeleton movement.
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      沈阳化工大学材料科学与工程学院 沈阳 110142

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