Modelling Reseach on The Rock- Fluid Reaction Dynamics of The Fossil Crust of Weathering in The North of Ordos Basin
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摘要: 古风化壳在油气储集、运聚中占重要地位，如华北、鄂尔多斯、塔里木盆地等地区重要油气藏的形成，与其碳酸盐岩顶部古风化壳密切相关。综合应用流体动力学、化学动力学及化学热力学理论，对古风化壳风化期岩石—流体相互作用过程动态模拟，重现古风化壳风化期流体动力场和化学动力场，从而达到定量预测古风化壳风化期物性参数（如孔隙度、渗透率等）变化的目的，最终为储层定量评价提供参数。岩石—流体反应动力学模拟是通过计算机对岩石与流体相互作用过程作一个动态再现，具有重要理论价值与实际意义Abstract: Fossil crust of weathering played an important role in the reservior, migration and accumulation ofoil and gas, for example the formation of Some important oil or gas pools in the North of China, OrdosBasin and Tarium Basin, which is related to the fossil crust of weathering on the top of carbonate forma-tions.The synthetically fluid dynamics, chemical dynamics and chemical thermodynamics were used tomodel dynamically the rock- fluid reaction process of and to restore the fluid dynamic field and chemicaldynamic field of the fossil crust of weathering during the period of weathering and leaching, so as to pre-dict the changes of physical parameters, such as porosity and permeability, and to provide the parametersfor reservior quantative evaluation.The modelling reseach on the rock- fliud dynamics is to restore dy-namically the interaction process between the rock and fluid, which has important theoretical and practi-cal meanings.
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Key words:
- crude oil /
- geochemical features /
- source matter /
- Ordovician /
- Tarim Basin /
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