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在Wairakei地区1平方公里的开采钻探区,重力有一100。(士30。)微伽的变化(已进行了地表沉降改正),在其周围50平方公里的区域内有较小的变化.这些变化的最大部分发生在六十年代.从那以后,整个热田的重力变化是零,这表明质量流动达到平衡.重力变化的主要原因是深部的流体压力减少,这种减少导致了蒸汽区的形成,其次是蒸汽区饱和状态的变化、液体温度的下降和地下水位的变化.重力模型认为,在1962年蒸汽区的饱和度是0.7(士0.1),到1972年减少到0.6.从七十年代初,在钻探区的韭面和东面的重力增加被认为是冷水侵入到蒸汽区造成的.
In the 1-square-kilometer drilling area in the Wairakei area, there is a gravity of 100. (± 30.) The change in micro-gamma (corrected for surface subsidence) has shown a minor change in the area around 50 km2, the largest of these changes occurring in the 1960s, and since then the entire heat The gravity change in the field is zero, which indicates that the mass flow is in balance. The main cause of the gravity change is the decrease in fluid pressure in the deep, which leads to the formation of the steam zone, followed by the change in the saturated steam zone, the drop in the liquid temperature, Changes in groundwater level The gravity model considers the saturation of the steam zone to be 0.7 (± 0.1) in 1962 and to 0.6 in 1972. From the early 1970s, the gravitational increase in the leeks and east of the drilling area Think of cold water invaded into the steam zone.