文章摘要
杨永红,宋涛,刘和花,史猛,赵松,吴建峰.基于综合物探的济阳坳陷潜山型干热岩靶区优选[J].矿产勘查,2024,15(1):107-116
基于综合物探的济阳坳陷潜山型干热岩靶区优选
Optimization of buried hill type dry hot rock targets in Jiyang Depression based on comprehensive geophysical exploration
投稿时间:2023-10-20  修订日期:2023-10-30
DOI:10.20008/j.kckc.202401010
中文关键词: 济阳坳陷  地热资源  干热岩  综合物探  潜山
英文关键词: Jiyang Depression  geothermal resources  hot dry rock  comprehensive geophysical exploration  buried hill
基金项目:本文受山东省自然科学基金青年项目(ZR2022QD060)和胜利油田分公司科研项目“济阳坳陷干热岩资源潜力评价与选区研究(P22090)”联合资助。
作者单位邮编
杨永红 中国石化胜利油田有限公司山东 东营 257001 257001
宋涛* 江苏华东八一四地球物理勘查有限公司江苏 南京 210007 210007
刘和花 江苏华东八一四地球物理勘查有限公司江苏 南京 210007 210007
史猛 山东省第三地质矿产勘查院山东 烟台 264000 264000
赵松 江苏华东八一四地球物理勘查有限公司江苏 南京 210007 210007
吴建峰 江苏华东八一四地球物理勘查有限公司江苏 南京 210007 210007
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中文摘要:
      济阳坳陷蕴藏着丰富的地热资源,开展深层干热岩的系统评价对于坳陷地热资源综合利用具有重要意义。本文利用收集的1∶20万重力数据38870 km2、1∶5万航磁数据26630 km2和胜利油田以往实施的钻井、地震勘探资料,采用Parker-Oldenburg反演迭代算法、重力-地震联合剥层方法、重磁正反演等方法,开展莫霍面、居里面、壳断裂-岩石圈断裂、基底构造和基底岩性等地热地球物理研究。通过实施大地电磁测深剖面116 km,验证了壳幔过渡带熔融体发育特征。从居里面深度、莫霍面深度、地温梯度、热储层岩性、盖层厚度、潜山规模6个方面评价优选了5处干热岩靶区。济阳坳陷具“壳幔生热、构造控热、潜山储热、盖层保温”四位一体地热成因特征,是以“传导型干热-水热共存、对流型水热补充”为主要特征的盆地复合型地热系统,潜山型干热岩靶区具有进一步勘探和开发的前景。
英文摘要:
      The Jiyang Depression is known for its abundant geothermal resources, and a systematic evaluation of deep dry hot rocks is crucial for the comprehensive utilization of geothermal resources in the depression. This study utilizes a comprehensive dataset, including 1∶200000 gravity data covering an area of 38870 km2, 1∶50000 aeromagnetic data covering 26630 km2, drilling data and seismic exploration data conducted by Shengli Oilfield Company. Various advanced techniques, such as the Parker-Oldenburg inversion iteration algorithm, gravity seismic joint layer stripping method, and gravity magnetic forward and backward modeling, are applied to perform geothermal geophysical research on key parameters including the Moho surface, Curie surface, crustal fault lithospheric fault, basement structure, and basement lithology. To verify the development characteristics of molten bodies in the crust-mantle transition zone, a 116 km magnetotelluric sounding profile is implemented. Based on comprehensive analysis, five promising dry hot rock targets are identified and evaluated from six perspectives: the depth of the Curie surface, the depth of the Moho surface, the geothermal gradient, the lithology of the thermal reservoir, the thickness of the cap rock, and the scale of the buried hill. The geothermal system in the Jiyang Depression exhibits a four in one geothermal genesis feature, namely “crust mantle heat generation, structural heat control, buried hill heat storage, and cover layer insulation”. It is primarily a basin composite geothermal system characterized by a combination of conduction-type dry heat water and convection-type water heat supplement. The findings of this study present significant opportunities for further exploration and development of the buried hill-type dry hot rock targets in the Jiyang Depression, confirming their potential for geothermal energy extraction and utilization.
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