NEW UNDERSTANDING OF GEOTHERMAL RESERVOIR BY ADVANCED MAPPING

1.服务器的安装：为本项目在东北大学安装了数据服务器。2.联合实验：与Socomine合作在Soultz HDR现场进行了联合声发射测量实验。3.项目会议：97财年和98财年在仙台举行了三次项目会议。4.多分量信号处理工作组：(A)通过SPM分析检查了3D地形图的原位可探测性，(B)使用双3C探测器进行了时频相关性分析，(C)将小波谱矩阵分析引入到声发射反射方法中，(D)研究了3D三轴钻头VSP，(E)对Soultz数据集进行三轴声发射双重分析。(F)开发了声发射二元组自动聚类软件。5.AB层析成像WG：将声发射层析成像方法应用于Soultz数据集。6.分离网络WG：定量评价了Soultz声发射网络的性能，研究了钻头VSP法、声发射反射法和二元组分析的应用。7.去模糊成图WG：在去模糊成图中引入了裂缝网络和地质构造的信息。8.声发射机理WG：找出了储层内无震带的存在。对地震/非地震区进行了理论和试验研究。研究了二重体的空间和时间分布。

1.Installation of a server : A data server was installed in Tohoku University for this Project.2.Joint Experiment : Joint AE measurement experiment was carried out at Soultz HDR site in cooperation with Socomine.3.Project Meetings : Three project meetings were held in Sendai in FY 97 and 98.4.Multicomponent signal processing WG : (a) In-situ detectability of the 3D hodogram was examined by the SPM analysis, (b) A time-frequency coherency analysis using the double 3C detector was investigated, (c) Wavelet spectral matrix analysis was introduced into the AE reflection method, (d) The 3D triaxial drill-bit VSP was investigated, (e) Triaxial AE doublet analysis was applied to Soultz dataset. (f) A software to automatically clusterize AE doublets was developed.5.AB Tomography WG : AE tomography method was applied to Soultz data set.6.Sparse Network WG : The performance of the AE network at Soultz was quantitatively evaluated and application of drill-bit VSP,AE reflection method and doublet analysis was investigated.7.De-blurred mapping WG : Information on fracture network and geologic structure was introduced to the de-blurred mapping.8.AE mechanism WG : Existence of aseismic zone inside the reservoir was found out. Theoretical and experimental study on seismic/aseismic zones was carried out. Spatial and temporal distribution of the doublet were examined.