为预测原位热解工艺带来的采区水文地质环境变化,通过控制热解温度和时间以研究不同热解程度油页岩的弹性模量变化规律。分析了油页岩弹性模量变化机理,结合油页岩热解反应速率方程,提出了热解过程中油页岩的弹性模量定量计算模型。将弹性模量试验值与计算值进行了对比分析,结果表明:计算值与试验值较为吻合,两者误差较小,提出的定量计算模型能较准确地估算热解过程中油页岩弹性模量。该模型对油页岩原位热解采区孔隙率、渗透率、地下水污染物运移模拟研究具有一定借鉴意义。
In the aim of predicting the hydrogeological environment changes in mining area caused by in-situ pyrolysis process, we examined the variation rules of elastic modulus of oil shale by controlling the pyrolysis temperature and time. We established a quantitative model of the elastic modulus of oil shale during pyrolysis based on the pyrolysis reaction rate equation. We further compared the test values with calculation values, and results suggest that the calculated elastic modulus values from the quantitative model are in good agreement with the experimental data, with a relatively small error. The proposed quantitative model accurately estimates the elastic modulus of oil shale during pyrolysis, thus is of referential value for the simulation of porosity, permeability, and groundwater pollutant transport in oil shale in-situ pyrolysis mining area.
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