江苏宝应地区热储类型与勘探前景

Thermal reservoir type and exploration prospect in the Baoying area of Jiangsu

江苏宝应地区在寒武—奥陶系碳酸盐岩地层中获得水温93℃水量为2200m3/d的高温、高产地热资源,位居华东地区前列。热储岩性为寒武系—奥陶系的碳酸盐岩,为裂隙型裂隙—溶蚀孔洞型,具有分布广埋藏深度浅(1000～2500m)溶蚀孔洞裂隙发育的"古风化壳"特征,有利地热资源的富集,勘探前景广阔。

Geothermal resources of high temperature and high yield have been found in the Cambrian and Ordovician carbonate strata in the Baoying area of Jiangsu province, with a water temperature of 93℃ and a water quantity of 2200 m3/d, ranking frst in east China. The reservoir types are fracture, fracture-corrosion pore, and cavern. The lithology is Cambrian and Ordovician carbonate rock, with characteristics of extensive distribution; shallow burial depth （1000 to 2500m）; and a ＂paleoweathering crust＂ with developed corrosion fractures and caverns, which is benefcial to the enrichment of geothermal resources. Thus, the area has broad exploration prospect, where the main exploration type is conducive to geothermal resources. The object is the Cambrian, Ordovician and Sinian carbonate rock, and the exploration depth is 1000 to 3000m.