Integrated multicomponent solute geothermometry
Integrated multicomponent solute geothermometry
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DOI：
10.1016/j.geothermics.2013.10.012
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发表时间：
2014-07
期刊：
影响因子：
3.9
通讯作者：
N. Spycher;L. Peiffer;E. Sonnenthal;G. Saldi;M. H. Reed;B. Kennedy
中科院分区：
文献类型：
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作者：
N. Spycher;L. Peiffer;E. Sonnenthal;G. Saldi;M. H. Reed;B. Kennedy
为了简化其应用，并通过对地热流体进行全面和综合的化学分析来改进地热储层温度的预测，本文对先前开发和证明良好的矿物饱和度地热测量方法进行了重新研究。储层温度是通过计算矿物饱和度指数作为温度函数的聚类来估计的。深层地热流体成分的重建和地热测量计算在一个独立的程序中实现，允许使用现有的参数估计软件通过数值优化估计未知或约束较差的输入参数。利用以往研究的地热水，以及通过实验室实验和反应输运模拟获得的不同程度的流体-岩石化学平衡，对地热测量系统进行了测试。对于未与储层矿物完全平衡的流体和/或受到稀释和气体损失等过程影响的流体，这种综合地热测量方法比传统的地温计具有优势。
The previously developed and well-demonstrated mineral saturation geothermometry method is revisited with the objective to ease its application, and to improve the prediction of geothermal reservoir temperatures using full and integrated chemical analyses of geothermal fluids. Reservoir temperatures are estimated by assessing numerically the clustering of mineral saturation indices computed as a function of temperature. The reconstruction of the deep geothermal fluid compositions, and geothermometry computations, are implemented into one stand-alone program, allowing unknown or poorly constrained input parameters to be estimated by numerical optimization using existing parameter estimation software. The geothermometry system is tested with geothermal waters from previous studies, and with fluids at various degrees of fluid–rock chemical equilibrium obtained from laboratory experiments and reactive transport simulations. Such an integrated geothermometry approach presents advantages over classical geothermometers for fluids that have not fully equilibrated with reservoir minerals and/or that have been subject to processes such as dilution and gas loss.