中国地质2025，Vol.52Issue(2)：452-461,10.DOI:10.12029/gc20231213002
花岗岩型干热岩储层裂缝刻画的三维地震属性分析技术研究
Research on three-dimensional seismic attribute fusion technology for characterizing fractures in granite geothermal reservoirs
摘要
Abstract
This paper is the result of geothermal geological survey engineering. [Objective]It is necessary to predict the characteristics,spatial distribution and density of natural fractures in granite reservoirs using high-precision seismic data and feature analysis methods,which provide scientific evidence for the construction of Enhanced Geothermal System(EGS).[Methods]This study adopted advanced 3D seismic techniques,including wideband,wide-angle,high-density sampling,as well as advanced processing methods such as structural-oriented filtering and multi-window dip scanning.The application of these techniques greatly improved the signal-to-noise ratio of seismic data,further optimizing the detection effect of the granite interior.At the same time,this study also combines 3D seismic attributes such as seismic attribute volume,maximum likelihood volume,coherence volume,curvature volume,variance volume,and ant volume with multi-azimuth constraints to accurately predict the spatial distribution density of fracture clusters.[Results]Through comprehensive attribute analysis and drilling imaging logging results,we reveal the regularity of the development of northeast and northwest fractures in granite-type hot dry rock reservoirs.These results are highly consistent with drilling imaging logging results,further verifying the accuracy and reliability of this research method.[Conclusions]This study successfully predicted the characteristics,spatial distribution,and density of natural fractures in granite-type hot dry rock reservoirs through high-precision seismic data and feature analysis methods.This method provides important evidence for fracture detection,drilling deployment,and mining plan determination in EGS engineering construction.关键词
三维地震/地震属性/花岗岩裂隙/增强型地热系统/干热岩/地热地质调查工程Key words
three-dimensional seismic/seismic attributes/granite fractures/enhanced geothermal systems/hot dry rock/geothermal geological survey engineering分类
地质学引用本文复制引用
连晟,程正璞,吴俊军,董金伟,田蒲源..花岗岩型干热岩储层裂缝刻画的三维地震属性分析技术研究[J].中国地质,2025,52(2):452-461,10.基金项目
中国地质调查局项目(DD20211336、DD20230018)资助. Supported by the projects of China Geological Survey(No.DD20211336,No.DD20230018). （DD20211336、DD20230018）
