Modelling of rock alteration due to coupled heat and mass transport

被引：0
|
作者：
R. Ondrak
机构：
[1] GeoForschungsZentrum,
[2] Telegrafenberg A51,undefined
[3] D-14473 Potsdam,undefined
[4] Germany Fax:+0331 288 1328 E-mail: ondrak@gfz-potsdam.de,undefined
来源：
Geologische Rundschau | 1997年 / 86卷
关键词：
Key words Reaction-transport model; Diagenetic modelling; Thermal modelling; Fluid flow; Chemical diagenesis; Rock alteration;
D O I：
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学科分类号：
摘要：
 A three-dimensional computer model is presented for studying the interaction of heat and mass transport regarding the temporal and spatial evolution of sandstones. The model simulates coupled heat and reactive mass transport in porous rocks. In general, mineral solubilities in water are low. Therefore, large fluid volumes are required to flow through the rock to explain observed mineral cements in sandstones. Besides mass transport, pore fluids transport heat which modifies rock temperatures. Very high flow rates result in strong temperature modifications and, therefore, enhance diagenesis. Low flow rates often cannot account for observed cementation. The model results show the effect of advective, convective and conductive heat transport on temperature and diagenetic evolution of sandstones for two different flow systems in a simple geological environment.
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页码：262 / 274
页数：12
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