二维弯线采集中测线优化设计方案与实现  

Line optimization design scheme and implementation in crooked-line survey

作　　者：刘军胜 LIU Junsheng(Sinopec Gephysical Corporation,Beijing,China 100000,China)

机构地区：[1]中石化石油工程地球物理有限公司,北京100000

出　　处：《物探化探计算技术》2023年第5期579-584,共6页Computing Techniques For Geophysical and Geochemical Exploration

摘　　要：区别于常规二维地震资料采集方法,弯线采集以自由曲线或折线的形式进行测线设计。弯线采集在炮点和检波点选择方面更为灵活,能够有效解决大型障碍物、困难地形区域施工的问题。然而弯线的CMP点在平行和垂直测线方向都是离散的,特别是当目的层埋深较浅时,叠加剖面的真实性受到严重影响,降低CMP离散度和离散CMP点的处理是提升资料品质和可靠性的关键。因此,这里提出了在优选炮点的基础上,利用检波点反演、CMP点正演、CMP点&检波点分段拟合、迭代优化等相结合的方式对,检波点和CMP面元进行优化的方案,并通过软件编程实现测线自动优化和分析最小化目的层CMP点的离散度,以保障资料品质。Unlike conventional 2D seismic data acquisition,the crooked-line survey designs the line as a free curve or brake line.The crooked-line survey is more flexible in choosing shot and receiver points and can effectively solve the operation difficulties of enormous obstacles and complex terrain areas.However,the CMP points of the curved line are discrete in both the parallel and vertical directions,especially when the target layer is shallow;the authenticity of the stack section is seriously affected.The key to improving data quality and reliability is reducing CMP dispersion and discrete CMP points' data processing.In this paper,an optimizing scheme was raised.Based on the preferred shot points design,the receiver points and CMP bin could be optimized through receives inversion,CMP point forwarding,Polynomial Piecewise fit,and Iteration.The automatic optimization and analysis of the survey line was realized through software programming.The programs helped minimize the target layer's dispersion and ensure the data quality.

关 键 词：空间假频 CDMO 检波点反演 CMP点正演 多项式分段拟合 

分 类 号：P631.4[天文地球—地质矿产勘探]