压降及储层压力与煤变形的相关性研究

发布时间：2018-07-03 19:59

本文选题：压降 + 储层压力　；参考：《西南石油大学学报(自然科学版)》2017年06期

【摘要】：为了进一步完善解吸瓦斯煤体变形机理,探讨压降和储层压力对煤解吸瓦斯的影响,采用原煤试件,进行了不同储层压力和压降的煤解吸瓦斯变形实验。实验结果表明,解吸达到平衡所需时间与储层压力及压降呈正相关关系;降压0.3 MPa时,收缩应变随储层压力的增加而减小;降压至大气压时,收缩应变随储层压力的增大而增大,储层压力0.9 MPa的大于储层压力0.6 MPa的大于储层压力0.3 MPa的;当储层压力相同时,收缩应变随压降的增大而增加;当储层压力较小时,大压降储层瓦斯解吸量大于小压降储层瓦斯解吸量。
[Abstract]:In order to further improve the deformation mechanism of the desorption gas coal body and discuss the influence of pressure drop and reservoir pressure on coal desorption gas, the experiment of coal desorption gas deformation is carried out with different pressure and pressure drop of different reservoir. The experimental results show that the time required for the desorption to reach the balance is positively related to the pressure and pressure drop of the reservoir; the depressurization is 0.3 MPa. While the contraction strain decreases with the increase of reservoir pressure, the shrinkage strain increases with the increase of reservoir pressure, and the reservoir pressure is 0.9 MPa greater than that of reservoir pressure of 0.6 MPa greater than that of reservoir pressure 0.3 MPa; when the reservoir pressure is simultaneously, the shrinkage strain increases with the increase of pressure drop; when the reservoir pressure is small, the large pressure drop is stored. The level of gas desorption is larger than that of small pressure drop reservoir.
【作者单位】：辽宁工程技术大学力学与工程学院;东北煤田地质局107勘探队;中建一局集团建设发展有限公司;
【基金】：国家自然科学基金(51304111) 国家重点研发计划(2016YFC0600704,2016YFC0801404)
【分类号】：TD712.6

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