CHARACTERISTICS AND DEVELOPMENT OF THE THERMAL STORAGE SYSTEM IN THE NORTH OF SONGLIAO BASIN

The Songliao basin, which belongs to continental lacustrine basin formed by Meso-Cenozoic large fault depression, is a typical sedimentary basin type of within-plate geothermal belt. The northern part of Songliao basin is not only an extra-large sandstone type of oil and gas field, but also an extra-large stratiform geothermal field with low, medium and high temperature. Study and analysis on previous data confirm that there distributed four capping beds of mudstone and four thermal reservoirs from top to bottom in northern Songliao basin, which compose four thermal storage systems. Up to present, the geothermal resources in the north of Songliao basin have not been systematically studied on the evaluation of regional exploration, except for local exploration and evaluation. There is not any regional development and utilization plan yet, although some preliminary small-scale extensive activities were conducted. The development and utilization degree is low, with serious waste of resources. Based on the above analysis, countermeasures and suggestions for the development and utilization of geothermal resources in northern Songliao basin are put forward.