摘要
水热型地热资源是我国地热开发利用的重要组成部分,长期以来水热型地热资源的持续开发导致了不同程度的地质环境变化,逐渐引起人们的重视,进行地热开采过程中的多方法动态监测十分必要.长周期重复的高精度重力测量可以监测地热田的储层水量和参数变化,为热储建模提供约束,进而为地热田评估及可持续开发提供重要数据,目前正成为研究热点.测量方法一般可分为相对重力测量、绝对重力测量和混合重力测量.本文回顾了世界上多个国家开展地热田重力监测的历史、主要成果和最新进展,梳理了地热田开展重力监测的方法技术,包括监测网布设、设备选择、测点高精度定位新技术、各项改正方法、数据处理和反演方法等,提出了在国内重要地热田开展高精度重力监测的建议.随着仪器设备和方法技术的进步,混合重力测量将成为地热田重力监测的发展重点.数据处理及三维反演是目前地热田重力监测的关键技术问题.
Hydrothermal geothermal resources are an important part of the development and utilization of geothermal resources in China.For a long time,the continuous development of hydrothermal geothermal resources has led to various degrees of geological environment changes and gradually attracted people’s attention.It is necessary to carry out multi-method dynamic monitoring in the process of geothermal exploitation.Long-period repeated high-precision gravity measurement can monitor the change of reservoir water quantity and parameters in geothermal field,provide constraints for thermal reservoir modeling,and further provide important data for geothermal field evaluation and sustainable development,which is now becoming a research focus.Measurement methods can be generally divided into relative gravity measurement,absolute gravity measurement and hybrid gravity measurement.This paper reviews the history,main achievements and latest progress of gravity monitoring in geothermal fields in many countries in the world,sorts out the methods and technologies of gravity monitoring,including monitoring network layout,equipment selection,new technology of high-precision positioning of measuring points,various correction methods,data processing and inversion methods,etc.,and puts forward suggestions for carrying out high-precision gravity monitoring in important geothermal fields in China.With the development of gravity instruments and methods,hybrid gravity measurement will become the focus of gravity monitoring in geothermal field.Data processing and three-dimensional inversion are the key technical problems in gravity monitoring of geothermal field.
作者
雷晓东
王立发
杨全合
李晨
孙杰夫
尤志鑫
LEI Xiao-dong;WANG Li-fa;YANG Quan-he;LI Chen;SUN Jie-fu;YOU Zhi-xin(Beijing Institute of Geo-exploration Technology,Beijing 100120,China)
出处
《地球物理学进展》
CSCD
北大核心
2019年第6期2173-2179,共7页
Progress in Geophysics
基金
延庆盆地1:2.5万高精度重磁测量(PXM2019-158307-000009)
通州某建设新区深部地热资源勘查与示范项目(PXM 2016_158307_000013)项目联合资助
关键词
地热田
重力
监测
热储
Geothermal field
Gravity
Monitoring
Reservoir
