Development of a measurement techniques of coherent waves by a downhole double three compnent seismic detector

井下双三分量地震探测器相干波测量技术的研制

• 批准号: 11555265
• 负责人: ASANUMA Hiroshi
• 金额: $ 8.38万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555265/
• 关键词: F-T Coherence; Downhole 3C detector; AE reflection method; SWD; Superresolution mapping; Crosshole measurement; クロスホール計測

1.Application to super resolution mapping : We investigated a method to use crossvariance matrix from upper and lower detector in frequency domain for precise detection of polarization of P wave. It has been revealed that effect of uncorrelated noise is effectively suppressed by this method.2.Application to AE reflection method : Software for three dimensional TFC method, where coherency of hodogrmas is evaluated, was developed. Reflectors at Kakkonda geothermal field was successfully imaged by this method.3.Application to drill bit reflection method : The TFC method was used in the analysis existing data sets and the effectiveness of this method was investigated.4.Application to cross hole measurement : Field experiments to detect coherent waves from pressurized fracture were made in Tohoku University Higashi Hachimantai Field, Iwate. Some coherent component appeared in the coherence index associated with water injection, although interpretation of origin and characteristics of thie wave has not done yet.

1.超分辨成像应用：研究了利用频域上、下检波器互方差矩阵精确探测P波偏振的方法。2.声发射反射法的应用：开发了三维TFC法计算软件，并对计算软件中的矢端图进行了相干性分析。应用于钻头反射法：将TFC方法应用于已有数据集的分析，验证了该方法的有效性; 4.应用于井间测量：在东北大学东八幡台地热田进行了承压裂缝相干波的现场实验。在与注水有关的相干指数中出现了一些相干分量，但对这种波的成因和特征还没有作出解释。

项目成果

劉,浅沼,新妻,バリア: "坑井掘削に伴うAEの偏波情報を用いた深部貯留層の反射イメージング"第6回地下と土木のAE国内コンファレンス. 78-83 (1999)

Liu、Asanuma、Niizuma、Barrier：“利用与钻井相关的 AE 偏振信息对深层储层进行反射成像”，第六届 AE 国内地下和土木工程会议 (1999)。

Hiroshi Asanuma, Hakusei Liu, Horiaki Niitsuma, and Roy Baria: "Characterization of HDR reservoir by seismic signal while drilling"Proc.WGC2000. (in CD-ROM). (2000)

Hiroshi Asanuma、Hakusei Liu、Horiaki Niitsuma 和 Roy Baria：“通过随钻地震信号表征 HDR 储层”Proc.WGC2000。

浅沼: "坑井掘削音を利用した地球計測"超音波テクノ. 12. 7-10 (2000)

浅沼：“利用钻井声音进行地球测量”超声波技术 12. 7-10 (2000)

高山,浅沼,新妻: "3次元ホドグラムの時間-周波数コヒーレンス解析と反射法への適用"物理探査学会第100回学術講演論文集. 25-29 (1999)

Takayama、Asanuma、Niizuma：“三维均线图的时频相干分析及其在反射法中的应用”物理探索学会第 100 届学术会议论文集 25-29（1999）。

Tanaka K.,Morita H.,Asanuma H.and Niitsuma H.: "Detection of traveltime delay caused by inflation of a single artificial fracture"Geothermal Science and Technology. 6. 181-200 (1999)

Tanaka K.、Morita H.、Asanuma H.和Niitsuma H.：“单个人工裂缝膨胀引起的走时延迟的检测”地热科学与技术。