松辽盆地北部热储体系特征及开发利用

松辽盆地属中、新生代形成的大型断拗陷陆相湖成盆地,为典型的沉积盆地型板内地热带.松辽盆地北部不仅是特大型的砂岩型油气田,也是特大型的层状低中高温地热田.通过对前人多年相关资料的分析研究,进一步证实松辽盆地北部由上至下分布4套盆地或区域泥岩盖层和4套热储层,二者空间配置组合形成了4套热储体系,并对4套热储体系特征进行了阐述.目前,松辽盆地北部地热资源没有进行系统的区域勘查评价研究,只进行了局部地段的勘查评价研究,没有编制相应的区域性开发利用方案,只进行了初步小规模粗放式的开发利用,开发利用程度低,资源浪费比较严重,没有做到绿色环保和可持续开发利用.据此提出松辽盆地北部地热资源开发利用对策与建议.

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.