西藏羊八井高温地热田地噪声与微地震勘查研究

为进一步探测西藏羊八井地热田深部高温热储的信息，１９８９年９－１０月在羊八井热田进行了地噪声测量、地热噪声源测试及微地震台网的短期监测工作结果得出：热田南部浅层热储的地噪声具有波谱主频稳定与振幅大的特性，圈定的异常范围与已知热储的分布一致；热田北部地噪声的波谱具有主频高、振幅小的特征．在热田首次记录到微地震与极微地震活动，综合结果分析认为在热田北部具有勘探深部高温热储的前景，并以实际资料给出了３处优先勘探的地段．

GEO-NOISE EXPLORATION AND MICROSEISMS DETECTING OF YANGBAJING GEOTHERMAL FIELD,TIBET

For getting deep informations of the geothermal field and applied effect of new techniques,we carried out geo-noise measurements, geo-noise source examina-tion and short supervision survey on microseisms network in YBJ Geothermal field in 1989. From these works mentioned above geo-noise of the shallow heat-storage reservoir is characterized by stable wave frequency and large vibrational extent in south of the geothermal field. The anomaly extension Is consistant with known thermal reservior. In north of the geothermal field, wave spectrum of geo-noise is characterized by high main frequency and small vibrational extent. Microseisms activity was first recorded in the thermal field. Activity to the comprehensive Study,explorating prospect for high-temperature geothermal reservior is considered to be meaningful and three perspective regions are suggested on this basis.