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首页> 外文会议>Twenty-fourth workshop on geothermal reservoir engineering >THE CERRO PRIETO AND SALTON SEA GEOTHERMAL FIELDS –ARE THEY REALLY ALIKE?
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THE CERRO PRIETO AND SALTON SEA GEOTHERMAL FIELDS –ARE THEY REALLY ALIKE?

机译：塞罗·佩里托（Cerro PRIETO）和萨尔顿（Salton）海地热场–它们真的很像吗？

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摘要

In the Salton Trough, of southern California and northern Baja California, the most important geothermal fields are those at the Salton Sea (SSGF) and Cerro Prieto (CPGF). They have nearly the same geologic framework; both are located in active pull-apart basins within the Trough, an actively growing rift valley which is the northern landward extension of the Gulf of California. The lithologic columns in these fields are dominated by deltaic and alluvial deposits, with that of the SSGF being richer in lacustrine sediments and evaporites. The heat sources in both fields are oceanic ridge-type intrusions of sheeted dike complexes. The volcanoes found in the CP and SS areas are genetically related to the hypabyssal rocks intercepted by some of the geothermal wells. The maximum temperatures measured in the wells are similar (i.e., around 350-370°C).The main difference between the two fields is in the salinity of the geothermal fluids. The maximum total dissolved solids in the SSGF geothermal brines is about 30% and only about 3% in CPGF brines. The hydrogeological regimes and the lithology prevailing in these fields could reflect this contrast.In spite of their similarities, the difference in the rate of field development has been enormous. Although the SSGF was discovered earlier and seems to have a larger energy potential, the CPGF was developed faster, at present having more than twice the capacity installed at SSGF. This was largely due to the high salinity (and corrosivity) of the SSGF brines. It took intensive research to develop the technology to handle these brines at the surface, separate the steam for electrical generation, and inject the waste brine safely. Other important factors influencing fielddevelopment were the dissimilar economic and regulatory conditions in Mexico and the US.
机译：在南部加利福尼亚州和北下加利福尼亚州的Salton槽中，最重要的地热田是Salton Sea（SSGF）和Cerro Prieto（CPGF）处的地热田。它们具有几乎相同的地质框架。两者都位于海槽内活跃的拉脱盆地中，海槽是一个活跃的裂谷，是加利福尼亚湾的北部陆上延伸。这些油田的岩性柱以三角洲和冲积沉积物为主，而SSGF的岩相柱中湖相沉积物和蒸发物含量较高。这两个领域的热源都是片状堤防复合体的洋脊型侵入。在CP和SS地区发现的火山与某些地热井拦截的海底岩石具有遗传相关性。孔中测得的最高温度是相似的（即约350-370℃）。 这两个场之间的主要区别在于地热流体的盐度。 SSGF地热盐水中的最大总溶解固体约为30％，而CPGF盐水中仅为约3％。这些领域中普遍存在的水文地质状况和岩性可以反映出这种对比。 尽管它们有相似之处，但在田间开发速度上的差异却是巨大的。尽管SSGF的发现较早并且具有更大的能源潜力，但CPGF的开发速度更快，目前的容量是SSGF的两倍以上。这主要归因于SSGF盐水的高盐度（和腐蚀性）。经过大量的研究开发了处理表面上这些盐水，分离蒸汽以发电以及安全注入废盐水的技术。影响领域的其他重要因素 发展是墨西哥和美国不同的经济和监管条件。

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