柴达木盆地马海盐湖地下卤水地球物理探测及应用  

Geophysical Exploration and Application of Underground Brine of Mahai Salt Lake in Qaidam Basin

作　　者：赵全升 孔智涵 胡舒娅 张建伟 Zhao Quansheng;Kong Zhihan;Hu Shuya;Zhang Jianwei(Department of Environmental Science and Engineering,Qingdao University,Qingdao 266071,Shandong,China)

机构地区：[1]青岛大学环境科学与工程学院,山东青岛266071

出　　处：《吉林大学学报（地球科学版）》2023年第5期1560-1572,共13页Journal of Jilin University：Earth Science Edition

基　　金：国家自然科学基金项目(41877198);青海中航资源有限公司项目(2012-G-154A)。

摘　　要：柴达木盆地盐湖地区地下卤水资源储量丰富,含卤水层具有孔隙度较小、非均质、各向异性较强及富卤水性能差异较大等特征。为精准探测马海盐湖地下卤水富集区域,获取盐岩分布密度差异性变化区间,针对柴达木盆地马海盐湖地区特有的盐岩介质、晶间高矿化度卤水,以及孔隙储卤、裂隙与断层控卤等多种储卤模式并存的地质条件,采用了包括抽水试验和高精度重力探测法、音频大地电磁探测法、高分辨率地震探测法的多尺度、多种物探方法对结晶盐层与富卤水地层进行了探测。抽水试验的结果表明,K_(12)、K_(13)、K_(14)等井组所处的卤水富集区Ⅰ出水量为37297 m^(3)/d,T_(1)、K_(1)、K_(4)等井组所处的卤水富集区Ⅱ出水量为35736 m^(3)/d;基于抽水试验和多种地球物理探测信息集成技术,确定了两处可实现持续与稳定开采的地下卤水富集区域,并刻画其地层结构与地质构造。The salt lake area of the Qaidam basin has abundant reserves of underground brine resources,the regional brine reservoirs have the characteristics of lower porosity,strong heterogeneity and anisotropy,and large differences in regional brine-rich properties.In order to accurately detect the underground brine enrichment area and determine variation range of salt rock distribution density difference of the Mahai Salt Lake,it is aimed at the unique salt rock medium,the high salinity of intercrystalline brine,and the coexistence of various brine storage modes such as pore brine storage and structural brine control in the salt lake area of the Qaidam basin.The multi-scale and multi-geophysical exploration method including pumping test,high-precision gravity method,audio magnetotelluric method and high-resolution seismic method were used to detect the distribution density difference variation range of salt rock layer,the electrical change of crystalline salt layer and brine-rich stratum.The pumping test shows that the brine enrichment area composed of Wells K_(12),K_(13),K_(14)etc.has a water yield of 37297 m^(3)/d in brine rich area Ⅰ.The brine enrichment area composed of T_(1),K_(1),K_(4) etc.has a water yield of 35736 m^(3)/d in brine rich area Ⅱ.Based on pumping test and integration technology of various geophysical exploration information,two underground brine enrichment areas that can be sustainably and stably exploitated were determined,stratigraphic structure and geological structure in the Mahai Salt Lake were delineated and established.

关 键 词：地球物理探测 信息集成 地下卤水 卤水富集区 马海盐湖 柴达木盆地 

分 类 号：P619.211[天文地球—矿床学]