Abstract:

Liaohe rift abounds in geothermal resource. Vast quantity of geothermal data was accumulated over the past forty-year’s exploration. The geothermal field in our study area is jointly controlled by faults, lithology, caprock buried depth and hydrology, has a relatively high geothermal gradient which ascends southwards. The geothermal reservoir is continuously hosted in several sequences, represented by two major types, clastic sedimentary pore type and karst fissure type. The former one is chiefly hosted in the Cenozoic and Mesozoic, and the latter one in the Archean and middle-upper Proterozoic. This paper, based on a comprehensive assessment, indicates some favorable areas for geothermal resource, including Dawa-Haiwaihe area (the Cenozoic) and Shuguang-Dujiatai area (the Paleozoic and middle-upper Proterozoic). With the decreasing oil-gas reserves in Liaohe Oilfield, it is of economic and social significance to explore the geothermal resource in these areas.

Key words:

geothermal resource; geothermal field; geothermal reservoir; reserve; Liaohe rift

摘要：

辽河断陷地热资源十分丰富，辽河油田经过40年的勘探开发，积累了大量与地热相关的基础资料，为本文研究奠定了基础。研究区地温场的展布主要受构造断裂、地层岩性、盖层埋深、水文地质条件等控制，地温温度较高，自北向南地温总体呈增高趋势。热储层位稳定，发育层系多，主要类型有碎屑沉积孔隙型和岩溶裂缝型，前者发育的层系主要为新生界和中生界；后者发育的层系主要为古生界和中新元古界。综合评价认为，辽河断陷最有利的地热田分布区为大洼—海外河地区（新近系）和曙光—杜家台地区（古生界和中新元古界）。随着辽河油田石油、天然气产量日益递减，开发利用该地区的地热资源必将取得巨大的经济效益和社会效益。

关键词: 地热资源；地温场；地热储层；资源量；辽河断陷