模型约束三维折射静校正方法研究  

A study of the model-constrained 3-D refraction static correction method

作　　者：张伟[1] 皮金云[1] 王彦春[1] 李洪臣[2] 谭昌勇[1] 王连山[1,3] 

机构地区：[1]中国地质大学地下信息探测技术与仪器教育部重点实验室,北京100083 [2]辽河油田特种油开发公司,盘锦124010 [3]华北油田分公司,廊坊065000

出　　处：《地球物理学进展》2009年第4期1468-1472,共5页Progress in Geophysics

基　　金：国家863计划重大项目(2001AA602018)资助

摘　　要：本文详细的介绍了模型约束三维折射静校正技术的基本原理和计算步骤,具体给出了三维抽线,目的层质量监控,三维速度内插,三维底界内插等技术的实现方法,并结合了西部某工区的具体实例加以说明.结果表明,这种由微测井、小折射求取近地表深度-时间速度模型,由大炮记录折射初至旅行时求取各点延迟时,两者联合反演低降速层底界的厚度和高程,最终求取低降速层静校正量的方法,可明显提高低降速带的反演精度,较好地解决表层结构复杂地区的静校正问题.The basic principles and calculation steps of model-constrained 3-D refraction static correction were introduced, the technology of 3 D pumping line, destination layer quality control, 3-D velocity interpolation, 3-D bottom interpolation were provided, and a specific examples in a work area of the western region was illustrated in this paper. The results show that the method of the near surface depth - time velocity model using the micro-logging, small refraction, delay time of every points uing first break travelling time of shot record, by which inversing layer thickness of the bottom and elevation, computing eventual static correction, can significantly increase the inversion precision of low-velocity layer, and better solve the static correction problem of complex structure of surface.

关 键 词：表层模型 反演 折射 静校正 互换法 

分 类 号：P631[天文地球—地质矿产勘探]