Reflection imaging of deep reservoir structure based on three‐dimensional hodogram analysis of multicomponent microseismic waveforms
Reflection imaging of deep reservoir structure based on three‐dimensional hodogram analysis of multicomponent microseismic waveforms
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基于多分量微震波形三维均线图分析的深层储层结构反射成像
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
R. Baria
中科院分区：
文献类型：
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作者：
N. Soma;H. Niitsuma;R. Baria
[1]我们已经应用了一种反射技术，其中自然或诱发的微震被用作波源，并在时间-频率域中处理，从Soultz干热岩网站的数据，以成像深层结构内的水库，可能与三个威尔斯井之间的流动路径。我们选择并分析了2003年观测到的119个良好波形。这119个事件的分布并不强烈倾斜，尽管所选事件的数量远小于所定位的总微震事件，但我们仍然成功地应用了反射分析。使用2003年的波形获得的反射图像与使用1993年和2000年的数据获得的反射图像一致。最后，通过使用所有可用波形数据的估计的集成创建详细的三维反射图像。反射体出现在深层地热威尔斯井周围，其中一个倾斜的反射体似乎是流动连接的障碍，这表明与2004年水力刺激期间产生的微震云有明显的相关性。从这些分析中，我们成功地解释了先存构造在威尔斯井间流动连通发展中的作用，这是干热岩石系统中的一个基本因素。
[1] We have applied a type of reflection technique, in which natural or induced microseismicity is used as a wave source and is processed in the time-frequency domain, to data from the Soultz Hot Dry Rock site to image deep structures within the reservoir that may be associated with flow paths among three wells. We selected and analyzed 119 good waveforms observed in 2003. The distribution of these 119 events was not strongly inclined, and although the selected number of events was much smaller than the total microseismic events located, we still succeeded in applying the reflection analysis. The reflection images obtained using waveforms from 2003 are in agreement with those obtained using data from 1993 and 2000. Finally, detailed three-dimensional reflection images were created by an integration of estimates using all available waveform data. Reflectors appear around the deep geothermal wells, and one of the dipping reflectors seems to be an obstacle to flow connection that shows a clear correlation with a microseismic cloud created during hydraulic stimulation in 2004. From these analyses we succeeded in interpreting the roles of preexisting structures in the development of flow connection among wells, which is an essential factor in a hot dry rock system.