浅析江西省宁都县罗陂地热的控热构造及深层开发潜力

AN ANALYSIS ON THE THERMAL CONTROL STRUCTURE AND DEEP PROSPECTING POTENTIAL OF LUOPI GEOTHERMAL IN NINGDU COUNTY, JIANGXI PROVINCE

罗陂地热田(以下简称"研究区")位于江西省赣州市宁都县。研究区有地热水出露点,区内褶皱不发育,主要发育6条北东-北北东向断裂(F1、F2、F3、F4、F4-1、F5)。为了查明区内的控热构造、可开发储量以及深层开发潜力,采用了物探、钻探等勘查手段。其中,钻探共施工3个钻孔,根据勘查结果,得出研究区控热导水构造为F4、F5断裂。钻孔内水温度随钻进深度的增加均呈平缓上升趋势;由于勘查条件限制,目前施工的3个钻孔钻进最大深度800.10 m,与估算的热储埋藏深度(1 827~2 943 m)相比还有很大的勘查空间。为此,推断研究区具有可观的深层开发潜力。

Luopi geothermal field(hereinafter referred to as "research area") is located in Ningdu County, Ganzhou City, Jiangxi Province.In the study area, There are geothermal water outcrops, and there are no folds, but six NNE-NNE trending faults(F1, F2, F3, F4, F4-1 and F5).In order to find out the thermal control structure, exploitable reserves and deep development potential in the region, Geophysical exploration, Drilling and other explor-ation means are adopted. Among them, 3 boreholes were drilled. According to the exploration results, it is concluded that the thermal and water control structure in the study area are F4 and F5 faults.The water temperature in the borehole increases gently with the increase of drilling depth.Due to the limitation of exploration conditions, the maximum drilling depth of the three boreholes currently under construction is 800.10 m, which still has a lot of exploration space compared with the estimated buried depth of thermal reservoir(1 827~2 943 m). Therefore, it is inferred that the study area has considerable deep development potential.