Geothermal reservoir monitoring with a combination of absolute and relative gravimetry
Geothermal reservoir monitoring with a combination of absolute and relative gravimetry
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DOI：
10.1190/1.2991105
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发表时间：
2008-11
期刊：
影响因子：
3.3
通讯作者：
M. Sugihara;T. Ishido
中科院分区：
文献类型：
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作者：
M. Sugihara;T. Ishido
微重力监测是绘制地下物质再分布图和评估与地热开采有关的储层边界流体补给变化的宝贵工具。为了进一步发展高精度绝对/相对混合重力测量技术，我们在日本的两个地热田使用绝对重力仪进行了测量。在中心产区进行了绝对重力测量，以直接测量出液引起的重力变化。我们成功地测量了Okuaizu和Ogiri油田的长期趋势，准确度在几个微加仑以内，这两个油田已经发电好几年了。磁场中心的绝对测量为更广泛分布的相对重力测量提供了可靠的局部参考基准锚点。在Ogiri油田，我们利用绝对和相对重力相结合的方法进行了延时混合测量，并描绘了…
Microgravity monitoring is a valuable tool for mapping the redistribution of subsurface mass and for assessing changes in fluid recharge from reservoir boundaries associated with geothermal exploitation. To further the development of a high-precision absolute/relative hybrid gravity-measurement technique, we conducted measurements using an absolute gravimeter in two geothermal fields in Japan. The absolute gravity measurements were performed in the central production areas to directly measure gravity changes caused by fluid withdrawal. We succeeded in measuring long-term trends within an accuracy of a few microgals in the Okuaizu and Ogiri fields, which have been producing electricity for several years. Absolute measurements in the center of the field provide reliable and local reference datum anchor points for more widely distributed relative gravity measurements. In the Ogiri field, we carried out time-lapse hybrid measurements with this combination of absolute and relative gravimetry and delineated the...