| 川西拗陷上三叠统气田水化学形成演化的重溯 |
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| 关键词:hydrochenmistry formation and evolution upper Triassic Chuanxi Depression |
| 基金项目:国家自然科学基金项目(编号: 40572143)资助 |
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| 摘要: |
| Restoration of the Formation and Evolution of Upper Triassic Gas Field Water in Chuanxi Depression |
| Based on studies of deposition, tectonic evolution, Upper Triassic aquifer system and hydrogeological age, this paper holds that T3x2 groundwater came from marine syndepositional brine of 35 g/kg, and experienced three “periods” of inspissation salt positive metamorphism, namely sedimentation, compaction and tectonic hydrothermal activity. Afterwards, they turned into deuterogenous sedimentary salt brine and strong salt brine of 1160 g/kg. Both T3x4 and T3x6 groundwater came from terrestrial facies syndepositional freshwater. T3x4 experienced four “periods”, i.e., sedimentation, compaction-leaching, compaction and tectonic hyrothermal activity. The major part was characterized by strongly concentrated salification and forward metamorphic process, and the later evolution into deuterogenous sedimentary pore and fissure salt brine of 100 g/kg. T3x6 and T3x2 experienced the same periods, resulting in strongly concentrated salification and forward metamorphic process and forming deuterogenous sedimentary pore and fissure salt brine groundwater of 84 g/kg. |
| WANG Shan,ZHANG Hong-da,SUN Ji-chao,JING Ji-hong.2009.Restoration of the Formation and Evolution of Upper Triassic Gas Field Water in Chuanxi Depression[J].Acta Geoscientica Sinica,30(5):665-672. |
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