Geochemistry of the high-salinity geothermal field of Asal, Republic of Djibouti, Africa
Geochemistry of the high-salinity geothermal field of Asal, Republic of Djibouti, Africa
复制标题
非洲吉布提共和国阿萨尔高盐度地热田地球化学
DOI：
10.1016/s0375-6505(97)10009-8
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发表时间：
1998
期刊：
影响因子：
3.9
通讯作者：
A. Abdallah
中科院分区：
文献类型：
--
作者：
F. D'amore;D. Giusti;A. Abdallah
1987-1988年，在吉布提共和国的阿萨尔裂谷钻了深层地热威尔斯井。Asal油田产出的盐水盐度超过100 000 mg/kg，气体含量低，约为0.6 mmol/mol。生产区和井底的测量温度约为260 - 359°C。在生产威尔斯井中观察到的闪锌矿和方铅矿结垢开始于约850 m深度处的闪蒸水平。计算出的地球化学温度接近260°C，这是位于1000至1300米深处的主要储层的平均温度。硫化物沉淀的结果是，在排放之前从原始流体中去除约90%的H2S。计算的组合物的盐水在水库条件下是兼容的绿帘石，（镁铝铁），钠长石，钾长石，钾云母，黄铁矿和硬石膏的稳定相的存在。主要补给水为海水。
In 1987–1988 deep exploratory geothermal wells were drilled in the Asal Rift in the Republic of Djibouti. The salinity of the brines produced in the Asal field exceeded 100 000mg/kg, with a low gas content of the order of 0.6 mmol/mol. Measured temperatures in the producing zones and at wellbottom vary from about 260 to 359°C. The sphalerite and galena scaling observed in producing wells starts at the flash level located at about 850 m depth. The calculated geochemical temperatures are close to 260°C, which is the average temperature of the main reservoir located at depths between 1000 and 1300 m. As a result of sulphide precipitation, about 90% of H2S is removed from the original fluid before discharge. The computed composition of the brine at reservoir conditions is compatible with the presence of stable phases of epidote, (MgFe)-chlorite, albite, K-feldspar, K-mica, pyrite and anhydrite. The main recharge water is seawater.
影响因子：
5
作者：
GIGGENBACH, WF
通讯作者：
GIGGENBACH, WF