摘要
为解决地震勘探中地下溶洞及采空区位置地震资料成像效果差的难题,利用正演模拟结合实际资料分析,总结该类区域地震资料的频率、能量和信噪比特征,在此基础上,提出一套针对性的处理方法,包括微测井约束层析静校正、弱信号提取与补偿、叠前五维数据规则化和基于构造约束的网格层析速度建模。通过在南川地区的应用,地震资料信噪比和波组连续性得到明显改善。证明了此方法可以有效提高地震勘探中溶洞及采空区位置地震资料品质。
In order to solve the problem of poor imaging effect of near surface karst cave and goaf location seismic data in seismic exploration,this paper summarizes the frequency,energy and signal-to-noise ratio characteristics of seismic data in this area using forward modeling combined with actual data analysis.On this basis,a set of corresponding processing methods are proposed,including micro log constrained tomography static correction,weak signal extraction and compensation,pre-stack five dimensional data regularization and structure constrained grid tomography velocity modeling.Through the application in Nanchuan area,the signal-to-noise ratio and wave group continuity of seismic data are obviously improved.It is proved that this method can effectively improve the quality of seismic data of karst caves and goafs in seismic exploration.
作者
孟庆利
任俊兴
杨帆
MENG Qingli;REN Junxing;YANG Fan(Research Institute of Exploration and Development,Sinopec East China Oil and Gas Company,Nanjing 210011,China)
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2021年第3期205-211,共7页
Coal Geology & Exploration
基金
国家科技重大专项项目(2016ZX05061)
中国石油化工股份有限公司科技开发基金项目(P19017-3)。
关键词
溶洞及采空区
微测井约束层析静校正
弱信号提取与补偿
叠前五维数据规则化
构造约束网格层析
karst cave and goaf
micro-log constrained tomography
weak signal extraction and compensation
pre-stack five dimensional data regularization
structure constrained grid tomography