天津王3井逸出氦气浓度变化特征分析  

Characteristics of Helium Concentration Variation Released from Wang 3 Well in Tianjin

作　　者：龚永俭[1] 陈嵩[1] 程立康[1] 李旭东[1] 

机构地区：[1]天津市地震局,天津300201

出　　处：《震灾防御技术》2015年第B10期750-759,共10页Technology for Earthquake Disaster Prevention

基　　金：中国地震局地震科技星火计划攻关项目“天津前兆台网数据跟踪分析质量监控与产出应用研究”（XH15003）、天津市地震局局内科研项目“王3井数字化氦变化特征的初步研究”（121006）

摘　　要：对天津王3井逸出氦气浓度日变化和年变化特征进行了分析，结果表明：①王3井逸出氦气浓度日变幅背景值在0．0012％-0．0036％之间，日变幅在冬季偏高；②在大多数观测日的10—18时左右，王3井逸出氦气浓度日变化曲线有“波谷”，但没有明显的“波峰”，但在部分观测日逸出氦气浓度日变化曲线的“波谷”却不明显，王3井逸出氦气浓度日变化形态不属于“固体潮”型；③王3井逸出氦气浓度年变化曲线呈上升的“双峰双谷”似“潮汐”形态，一般在6月、12月左右出现“波峰”，3月、9月左右出现“波谷”，相比较而言，“波峰”更显著。通过对井孔所在地的地质构造、大气温度、降水、同井孔水位、周边地热资源开采等因素的分析，笔者认为王3井逸出氦气浓度的变化基本不受大气温度、降水和同井孔水位变化的影响，主要与井孔所在地的断层活动性和周边地热资源的开采有关。Through analysis of the diurnal variation characteristics and annual variation characteristics of the helium concentration released from Wang 3 well in Tianjin, we found that： （1） The diurnal variation ranges of the helium concentration of Wang 3 well are from 0.0012% to 0.0036%, and the diurnal variation ranges are higher in winter than in other seasons; （2） During period of 10：00 am to 18：00 pm, the diurnal variation curve of helium concentration of Wang 3 well is with a ＂valley type＂ without obvious peak change. Sometimes the ＂valley＂ in diurnal variation curve of the helium concentration does not change significantly, and the diurnal variation of is not a tidal type; （3） The annual variation curve of helium concentration of Wang 3 well appears ＂double peak-valley＂ type, in which peaks happens in June and December, and valleys happens in March and September. By analysis of the geological structure, the atmospheric temperature, the water level in the same well, the geothermal resources exploitation surrounding the well, and instrument zero drift factors, we concluded that, the helium concentration of Wang 3 well is not affected by the atmospheric temperature, rainfall, and the same well water level, but is affected mainly by the geological structure and the geothermal resources exploitation surrounding the well.

关 键 词：氦气 日变化 年变化 王3井 天津 

分 类 号：P463.2[天文地球—大气科学及气象学]