| 沉积盆地深层地下卤水资源量评价之若干探讨 |
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| 关键词:brine sedimentary basin enrichment hydraulic head exploitation |
| 基金项目:国家“973”计划项目(编号: 2011CB403005)和中国地质调查项目(编号: 1212010011803) |
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| Some Problems Related to the Evaluation of Subsurface Brine Resources in Deep-seated Aquifers in Sedimentary Basins |
| Subsurface brines (including K-rich brines) in deep-seated aquifers in sedimentary basins lie under the deeply burial and sealing conditions and are lack of recharge. The brines are of extremely high hydraulic heads and are stagnant under natural conditions. Hydraulic connection does not exist between brine-bearing structures. Several parallel brine-bearing formations are superposed upon each other, and no hydraulic connection exists among the formations. The brine-bearing formations are of low porosity and permeability. The brines are mainly concentrated in anticlines, fracture zones and fault zones. The hydrochemical and physical characteristics of the brines are relatively stable during a short period of time. The storage resources of the brines are relatively large and the resources of the brines tend to decease and be exhausted under the condition of exploitation. Current status of the evaluation of subsurface brines in deep-seated aquifers in sedimentary basins and the characteristics of the brines are discussed and summarized in this paper. Some problems related to the evaluation of subsurface brines in deep-seated aquifers are analyzed and described, which include the types of brine resources in deep-seated aquifers and the selection of the corresponding evaluation methods of the brine resources as well as the generalization of the calculation domain, boundary conditions and subdivision of the permeability. The treatment of the effect of the density of the brines, the calculation of the piezometric head and the determination of the predicted drawdown of the hydraulic head for the production wells are also involved. The aim of this paper is to improve the accuracy of the evaluation of subsurface brines in deep-seated aquifers. |
| ZHOU Xun,JIANG Chang-long,HAN Jia-jun,TANG Li-wei,CAO Qin,LI Ting.2013.Some Problems Related to the Evaluation of Subsurface Brine Resources in Deep-seated Aquifers in Sedimentary Basins[J].Acta Geoscientica Sinica,34(5):610-616. |
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