典型层状热储地热水富集特征研究——以观音峡背斜东翼为例

观音峡背斜为典型的层状热储构造。利用背斜南东翼已成功实施的11口地热井资料,采用对比研究、相关分析等方法,揭示了层状热储地热水富集特征:热储埋深越大,岩溶发育程度越弱,地热水越贫乏;热储埋深越大,热储盖层隔热保温效果越好,地热水水温越高;层状热储含水层厚度愈厚,岩溶发育程度越强,地热水越富集;热储含水层厚度愈厚,岩溶裂隙越发育,地热水水温越低;"渐变型"层状热储地热水富集程度相对较好,地热井平均出水量2 136.75m~3/d;"急变型"层状热储地热水富集程度相对较差,地热井平均出水量584.93m~3/d。

Study on the enrichment characteristics of the geothermal water in typical layered thermal reservoir-Taking the east flank of Guanyinxia anticline as an example

The Guanyinxia anticline is a typical layered thermal reservoir, and 11 geothermal wells have been successfully implemented in its southeast flank. Using comparative study, correlation analysis and other methods to analyze the data of these wells, we research the enrichment characteristics of the geothermal water in typical layered thermal reservoir. The results show the larger the thermal reservoir buried depth is, the weaker the karst development and the poorer the geothermal water is. While, the larger the thermal reservoir buried depth is, the better the heat insulation performance of the thermal reservoir and the higher the temperature of hot water is. The thicker the layered thermal reservoir is, the stronger the karst development and the richer the geothermal water is. While, the thicker the thermal reservoir and the stronger the karst fissure''s development is, the lower the temperature of hot water is. The layered thermal reservoir with gradually changed occurrence is relatively rich, and the average water yield of the geothermal wells is 2 136.75 m³/d, while the layered thermal reservoir with rapidly changed occurrence is relatively poor, and the average water yield of the geothermal wells is 584.93 m³/d.