摘要
中国干热岩资源丰富,但有利区评价方法以定性为主,且评价指标和标准不一,制约了干热岩的评价效率和勘探进程。基于国内外干热岩地质特征和成因机制的认识,综合干热岩形成的主控因素,通过指标量化分级,应用模糊层次综合评价法建立干热岩有利区评价体系和标准。该评价体系以热源、热通道、热储和盖层4类指标为主体,包括莫霍面深度、居里面深度、熔融体或岩浆囊深度、岩浆和火山活动时间、大地热流、地温梯度、地表热异常、地震等级与震源深度、深大断裂分布、热储埋深、盖层类型与厚度共11项评价参数,每项参数分为3个等级,并进一步将该评价体系应用于内蒙古中部地区干热岩评价。结果表明:该地区干热岩Ⅰ类有利区面积约为494 km^(2),Ⅱ类有利区面积约为5.7×10^(4) km^(2)。其中,二连盆地吉尔嘎朗图凹陷和洪浩尔舒特凹陷,赤峰市克什克腾旗热水塘镇、宁城县热水镇及敖汉旗热水汤村为干热岩资源Ⅰ类有利区。此类地区以地下高温熔融体或岩浆囊为优质热源,热储深度较浅,上覆厚层沉积岩作为盖层。该干热岩有利区评价体系的建立和应用有望为中国干热岩选区和开发实践提供新的途径和科学依据。
China has abundant resources of hot dry rocks.However,due to the fact that the evaluation methods for favorable areas are mainly qualitative,and the evaluation indicators and standards are inconsistent,which restrict the evaluation efficiency and exploration process of dry hot rocks.This paper is based on the understandings of geologic features and genesis mechanisms of hot dry rocks in China and abroad.By integrating the main controlling factors of hot dry rock formation,and using index grading and quantification,the fuzzy hierarchical comprehensive method is applied to establish an evaluation system and standards for favorable areas of hot dry rocks.The evaluation system is based on four indicators:heat source,thermal channel,thermal reservoir and cap rock.It includes 11 evaluation parameters,including magma and volcanic activity time,depth of molten body or magma chamber,distribution of deep faults,burial depth of thermal reservoirs,cap rock types,surface thermal anomalies,geothermal flow,geothermal gradient,Moho depth,Curie depth,burial depth,seismic level,and focal depth.Each parameter is divided into 3 levels.Applying this evaluation system to assess hot dry rock in central Inner Mongolia revealed that Class I favorable zones cover approximately 494 km^(2),while Class II favorable zones span about 5.7×10^(4) km^(2).The Jirgalangtu Sag and Honghaershute Sag in the Erlian Basin,along with Reshuitang Town in Keshiketeng Banner,Reshui Town in Ningcheng County,and Reshuitang Town in Aohan Banner of Chifeng City,are identified as Class I favorable zones for hot dry rock resources.These areas are characterized by high-temperature subsurface molten bodies or magma chambers serving as high-quality heat sources,shallow thermal reservoir depths,and overlying thick sedimentary rock layers acting as caprock.The establishment and application of the evaluation system for favorable areas of hot dry rock are expected to provide new approaches and scientific basis for guiding the practice of selecting hot dry rock areas in China.
作者
熊波
许浩
方朝合
李士祥
唐淑玲
王社教
吴京杰
宋雪静
张璐
王金伟
位湘权
辛福东
唐博宁
龙吟
XIONG Bo;XU Hao;FANG Chaohe;LI Shixiang;TANG Shuling;WANG Shejiao;WU Jingjie;SONG Xuejing;ZHANG Lu;WANG Jinwei;WEI Xiangquan;XIN Fudong;TANG Boning;LONG Yin(PetroChina Shenzhen New Energy Research Institute Co.,Ltd.,Shenzhen 518063,China;School of Energy Resources,China University of Geosciences(Beijing),Beijing 100083,China)
出处
《石油勘探与开发》
北大核心
2025年第1期229-240,共12页
Petroleum Exploration and Development
基金
中国石油天然气股份有限公司前瞻性基础性科技项目“干热岩资源勘探开发关键技术研究”(2022DJ5503)。
关键词
干热岩
地热
热储
有利区
评价体系
二连盆地
内蒙古中部
hot dry rock
geothermal
geothermal reservoir
favorable area
evaluation system
Erlian Basin
central Inner Mongolia
作者简介
第一作者:熊波(1979-),男,湖北荆州人,博士,中石油深圳新能源研究院有限公司高级工程师,主要从事新能源、能源战略与油气地质研究。地址:广东省深圳市南山区高新南九道清华大学研究院新大楼B座,邮政编码:518063。E-mail:xiongb69@petrochina.com.cn;联系作者:李士祥(1981-),男,湖北钟祥人,博士,中石油深圳新能源研究院有限公司教授级高级工程师,主要从事能源战略、地热能与非常规油气地质研究。地址:广东省深圳市南山区高新南九道清华大学研究院新大楼B座,邮政编码:518063。E-mail:lishixiang01@petrochina.com.cn。
