渭河盆地新生界水气资源储层特征及存在问题分析

渭河盆地北靠鄂尔多斯地块，南依秦岭造山带，为一典型的地堑盆地，构造活动复杂，发育较厚的新生代地层，资源丰富.利用钻测录井等资料及野外调研、实验分析等方法，结合前人研究成果，对盆地新生代地层进行了重新划分界定，对水气资源类型及其赋层特征进行了深入分析.结果表明，盆地水气资源丰富，主要有地热（水）、矿泉水、地下水、水溶气、生物气、氦气、氡气、氢气等；含水层主要为古近系和新近系基岩裂隙孔隙含水层、第四系砂砾孔隙含水层，含水性好；热储层主要有红河组、白鹿塬组、高陵群（寇家村-冷水沟组）、蓝田-灞河组，总体物性较好，多为中孔-中渗储层；含气层除了和热储层一样外，还有张家坡组，其物性很好，为优质储层.对目前在盆地水气资源研究中存在的问题也进行了分析.

ANALYSIS ON THE RESERVOIR CHARACTERISTICS OF CENOZOIC WATER-GAS RESOURCES IN WEIHE BASIN AND PROBLEMS IN RESEARCH

The Weihe Basin, located on Ordos block to the north and Qinling orogenic belt to the south, is a typical graben basin with complex tectonic activities, thickly-bedded Cenozoic strata and rich resources. Based on the drilling-logging data, field investigation, experiment analysis and previous research results, the Cenozoic strata in the basin is redivided and the water-gas resource types and reservoir characteristics are analyzed in depth. The results show that the basin is rich in water-gas resources, including mainly geothermal (water), mineral water, ground water, water soluble gas, biogas, helium, radon and hydrogen. The aquifers are of mainly Paleogene and Neogene bedrock fissure-pore and Quaternary gravel pore types with good water-bearing property. The Honghe, Bailuyuan, Koujiacun-Lengshuigou and Lantian-Bahe formations serve as the major geothermal reservoirs, mostly with mesopore and medium permeability, showing generally good properties. As for the gas reservoir, in addition to the thermal reservoirs, there is the Zhangjiapo Formation with good physical property, belonging to high quality reservoir. Finally, the problems existed during the water-gas resources research in the study area are analyzed as well.