渤海湾盆地馆陶组热储特征与地热资源评价  

Geothermal reservoir characteristics and geothermal resource evaluation of Guantao Formation in the Bohai Bay Basin

作　　者：饶松[1,2] 肖红平 王朱亭[4] 高腾 施亦做 黄顺德 RAO Song;XIAO Hongping;WANG Zhuting;GAO Teng;SHI Yizuo;HUANG Shunde(School of Geoscience,Yangtze University,Wuhan,Hubei 430100,China;Key Laboratory of Exploration Technology for Oil and Gas Resources,Ministry of Education//Yangtze University,Wuhan,Hubei 430100,China;PetroChina Research Institute of Petroleum Exploration&Development,Beijing 100083,China;School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]长江大学地球科学学院 [2]油气资源与勘探技术教育部重点实验室·长江大学 [3]中国石油勘探开发研究院 [4]中国矿业大学矿业工程学院

出　　处：《天然气工业》2023年第5期141-152,共12页Natural Gas Industry

基　　金：国家自然科学基金“渭河盆地现今大地热流测量与地热系统热源机理研究”(编号:41877210);“中国大陆地区干热岩成因机制与勘探靶区优选”(编号:42074096);中国石油天然气股份有限公司油气与新能源板块科技课题“有效地热资源评价及热储层研究”(编号:2022KT2601)。

摘　　要：渤海湾盆地发育多类、多套热储层,其中新近系馆陶组砂岩热储埋深适中、厚度大、分布广泛,为盆地主力热储之一,但过去的研究缺乏针对全区馆陶组地热资源的系统性评价。为此,在全盆地现今地温场特征研究基础上,通过收集整理钻井、地质和物探资料,系统刻画了馆陶组热储平面展布特征,并评价了馆陶组热储地热资源量,圈定了地热资源有利区。研究结果表明:①渤海湾盆地第四系—古近系现今平均地温梯度为34.7±3.5℃/km,平均大地热流值为64.4±8.1 mW/m^(2),反映了新生代裂谷盆地属性,具备了形成大型中—低温地热田的地热背景;②馆陶组热储温度分布区间为19.6~96.2℃,平均值为56.3℃,相对高温区主要出现在黄骅坳陷、渤中坳陷,冀中坳陷等地区,总体分布趋势与盆地现今地温场格局基本一致;③盆地110个县级以上城市馆陶组热储地热资源量折合标煤99.6×10^(8) t,平均地热资源丰度148.6×10^(4) t/km^(2),属于资源条件最好的一类油田地热资源,其中66.7%集中分布在华北油区;④盆地馆陶组热储最大概率地热资源量折合标准煤662.2×10^(8) t,平均地热资源丰度为72.4×10^(4) t/km^(2)。结论认为,根据热储特征和地面、经济条件,可在全盆地圈定出9个馆陶组地热资源有利区,即邢衡隆起区、南宫凹陷区、丘县凹陷区、饶阳凹陷区、武清凹陷区、岐口凹陷区、埕宁隆起区、东营凹陷区、昌潍凹陷区。There are many sets of geothermal reservoirs of different types in the Bohai Bay Basin,and the sandstone geothermal reservoir of Neogene Guantao Formation is one of them which has moderate burial depth,large thickness and wide distribution.In the past,however,the Guantao Formation geothermal resources in the whole area were not evaluated systematically.Based on the research results of the present geothermal field characteristics in the whole basin,this paper systematically describes the areal distribution characteristics of the Guantao Formation geothermal reservoir by collecting and sorting out drilling,geological and geophysical data.Furthermore,the amount of geothermal resources of the Guantao Formation geothermal reservoir is evaluated,and the favorable areas of geothermal resources are delineated.And the following research results are obtained.First,the present average geothermal gradient of Quaternary-Paleogene in the Bohai Bay Basin is 34.7±3.5℃/km,while the average terrestrial heat flow is 64.4±8.1 mW/m^(2),which is the characteristics of the Cenozoic rift basin,indicating that there is geothermal setting for the formation of large geothermal fields with medium-low temperature.Second,the temperature of the Guantao Formation geothermal reservoir ranges from 19.6 to 96.2℃,with an average of 56.3℃.The relatively high temperature areas are mainly distributed in the Huanghua Depression,the Bozhong Depression and the Jizhong Depression,and the overall distribution trend is basically consistent with the present geothermal field pattern of the basin.Third,the amount of the Guantao Formation geothermal resources in 110 cities above the county level in the Bohai Bay Basin is equivalent to 99.6×10m^(8) t standard coal,and the average abundance of geothermal resources is 148.6×10^(4) t/km^(2),so it is classified as the first-level oilfield geothermal resource with the best resource conditions.And 66.7%of them are concentrated in the North China oil area.Fourth,the amount of the Guantao Formation maximum pro

关 键 词：渤海湾盆地 馆陶组 热储 热储特征 地热资源评价 现今地温场 油区地热 勘探有利区 

分 类 号：P314[天文地球—固体地球物理学]