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作者 | 李文靖 肖红平 饶松 施亦做 张翘然 黄顺德 胡光明

标题 | 松辽盆地中央坳陷及邻区三维地热地质建模与地热资源靶区优选

来源 | 地质科学

编辑 | 地热小芯(添加微信号:geothermalAI,可获得相关资料)

这是地热能在线AI地热小芯编辑的第1篇文章

01

全文导读

在地热资源勘探领域,三维地热地质建模技术的应用日益成为研究热点。近期,科研人员利用地球物理、钻孔资料以及岩石热物性数据,采用3D Geomodeller软件的空间插值方法,成功构建了松辽盆地中央坳陷区及其邻近地区的三维地热地质模型。该模型不仅直观展现了地质体的温度场分布,而且为确定地热资源的有利开发区域提供了重要依据。

通过对比盲井地层分层和钻孔实测温度数据,研究人员验证了三维地热地质建模和温度场模拟的准确性。研究结果显示,松辽盆地中央坳陷区及其邻区在1.0至4.0公里深度的地层温度分别在30.3℃至62.8℃、68.2℃至120.2℃、110.5℃至166.7℃、158.4℃至214.2℃之间。地温场的高异常区主要集中在大庆长垣中部、宾县王府凹陷和长春岭背斜带。

此外,研究还发现嫩江组、姚家组二段—三段、青山口组二段—三段、泉三段—四段四套主力热储层底板温度分别介于15.8℃至71.4℃、23.6℃至88.6℃、31.8℃至107.4℃、48.9℃至133.4℃之间,其中华字井阶地、大庆长垣、宾县王府凹陷为主力热储温度的高值区。

研究指出,现今研究区的地温场分布特征主要受基底起伏的控制。基底和沉积层热导率的差异导致的热流“折射”效应,促进了浅部热量的再分配,形成了凹凸相间的热流分布格局。断裂构造对地温场高异常区的分布也有显著影响。

综合分析热源、通道和储盖组合特征后,研究人员圈定了大庆长垣中部地区泉头组三段—四段作为松辽盆地中央坳陷地热资源开发的有利靶区,为未来的地热资源开发提供了科学指导。

02

HIGHLIGHT图片

图1 松辽盆地中央坳陷及邻区钻孔和地震剖面分布位置及地层剖面图(据 Ryder et al.,2003 修改)

Fig.1 Distribution location and stratigraphic profile of boreholes and seismic sections in the central depression and adjacent areas of the Songliao Basin(modified from Ryder et al.,2003 )

图2 松辽盆地中央坳陷及邻区三维地热地质建模及地温场模拟流程图(据 Calcagno et al.,2014 修改)

Fig.2 Flow chart of three-dimensional geothermal geological modeling and geothermal field simulation in the central depression and adjacent areas of Songliao Basin(modified from Calcagno et al.,2014 )

图3 松辽盆地中央坳陷及邻区三维地热地质模型

Fig.3 A three-dimensional geothermal geological model of the central depression and adjacent areas in the Songliao Basin

图4 源292、古514井分层数据和模型分层数据对比

Fig.4 Comparison of stratified data and model stratified data of Yuan 292 and Gu 514 wells

图5 徐深1和松科2实测与模拟地温曲线对比

Fig.5 Comparison of measured and simulated ground temperature curves between Xushen 1 and Songke 2

图6 松辽盆地中央坳陷及邻区实测与模拟热流值拟合图

Fig.6 Fitting diagram of measured and simulated heat flow values in the central depression and adjacent areas of the Songliao Basin

图7 松辽盆地中央坳陷及邻区不同深度地温场模拟结果

Fig.7 Simulation results of geothermal fields at different depths in the central depression and adjacent areas of the Songliao Basin

图8 松辽盆地中央坳陷及邻区0~4.0 km深度平均地温梯度平面展布

Fig.8 Plane distribution of average geothermal gradient at a depth of0~4.0 km in the central depression and adjacent areas of the Songliao Basin

图9 松辽盆地中央坳陷及邻区主力热储底板温度平面展布

Fig.9 Temperature distribution of the main thermal storage floor in the central depression and adjacent areas of the Songliao Basin

图1 0 松辽盆地sl2、sl5地震剖面地温场模拟结果(剖面位置见图1)

Fig.10 Simulation results of ground temperature field in seismic sections sl2 and sl5 of the Songliao Basin(profile shown in Fig.1)

图1 1 松辽盆地中央坳陷及邻区150.0℃等温面埋深等值线图

Fig.11 Contour map of 150.0℃isothermal surface burial depth in the central depression and adjacent areas of the Songliao Basin

免责声明:本文仅用于学术交流和传播,不构成投资建议

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