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首页> 外文会议>Geothermal Resources Council Annual Meeting >Fluid Inclusion Studies of the Berlin Geothermal Field, El Salvador
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Fluid Inclusion Studies of the Berlin Geothermal Field, El Salvador

机译：柏林地热场流体包涵体，萨尔瓦多

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Fluid inclusion studies confirm that wells TR-5, TR-5B and TR-5C are near the inferred present location of the upflow region in the Berlin geothermal system where ～300°C fluids are ascending through permeable caldera fault zones. The three wells did not show temperature reversals in the deep aquifer. Well TR-3 was drilled within the Berlin graben, near the eastern boundary of the geothermal resource. There, ～300°C brines flow laterally along lithologic contacts toward the northwest, between -800 and -1000 m (msl). Below -1000 m (msl), however, cooler temperatures (<270°C) prevail based on fluid inclusion and borehole data. The temperature reversal is attributed to cooling of deep aquifer fluids either by conduction or mixing with cooler waters descending along permeable fault zones within the graben. The decline of temperatures toward well TR-14 confirms its location along the northern boundary of the Berlin geothermal resource. Both fluid inclusions and borehole surveys indicate lower temperatures (～250-260°C) at -1500 m (msl) caused by conductive cooling of deep aquifer fluids or mixing with surface waters flow downward along faults. Fluid inclusion studies of TR-14 samples reveal a relict hydrothermal system with deep fluid temperature of ～330°C and apparent salinity of ～2,100-3,200 ppm chloride. This hotter regime in the northern portion of the field apparently is not related to the present Berlin geothermal system. Future production well drilling at Berlin should focus mainly south of the TR-5 area where the postulated upflow seems to be located. Wells should be designed to target permeable faults which channel ～300°C brine at -1000 m (msl). On the other hand, near the eastern boundary of the geothermal resource wells may be drilled to tap hot brine flowing between -800 and -1000 m (msl).
机译：流体包容性研究确认井Tr-5，Tr-5b和Tr-5c位于柏林地热系统中的上流区域的推断存在位置，其中〜300°C通过可渗透的Caldera故障区上升。三个井没有在深含水层中显示温度逆转。在柏林格拉杰河附近的地热资源东部边界附近，TR-3钻探。在那里，〜300°C盐水沿岩性接触朝向西北部横向流动，从-800和-1000米（MSL）之间。然而，基于流体包裹物和钻孔数据，低于-1000μm（MSL），冷却温度（<270°C）占上风。温度反转归因于通过传导或与沿Graben内的可渗透断层区下降的冷却器水混合冷却深度含水层流体。 TR-14的温度下降确认了沿柏林地热资源的北部边界的位置。流体夹杂物和钻孔调查显示，由深含水层的导电冷却或与表面水混合沿着故障向下流动引起的较低温度（〜250-260°C）。 TR-14样品的流体包裹性研究揭示了依赖水热系统，深层流体温度〜330°C，表观盐度为〜2,100-3,200ppm氯化物。这个领域北部的这种更热的政权显然与目前的柏林地热系统无关。柏林未来的生产井钻井应主要关注TR-5区域以南，其中假设的上流溢出所在地。井应设计为瞄准渗透性故障，该渗透断层均在-1000米（MSL）达到300°C盐水。另一方面，可以钻到地热资源井的东边界，以挖掘在-800和-1000米（MSL）之间的热盐水流动。

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