Depth Transform of Reflection Seismic Data by Use of Bore-Hole

利用钻孔进行反射地震数据的深度变换

• 批准号: 05650956
• 负责人: ASHIDA Yuzuru
• 金额: $ 1.41万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1994
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-05650956/
• 关键词: Seismic prospecting; Equi-travel time plane; Depth conversion; 反射法地震探査

In the present paper, it was clarified that as the reflection point was located on the ellipses whose loci were the source and the receiver, the reflector was determined as the common tangent line to the ellipses for many pairs of sorce and receiver drawn from the travel time of reflected waves and the average velocity to the reflector.Definitely, the following items were executed.(1) The derivation of the equation of equi-travel time planes.(2) The development of the algorithm for automatically drawing the common tangent line for the ellises.(3) The application of the proposed algorithm to the simulation data of offset VSP,cross-well reflection and surface reflection methods.(4) The extension of the algorithm to the three-dimensional data.Consequently, it was concluded that the migrated depth sections of three-dimensional reflection method were accurately reconstructed and this algorithm was applicable on the on-site mini-cpmputer because of the requirement for small size core memory and the high speed calculation time in computer and also, the prospecting of the look-ahead of tunnel face.

本文阐明了当反射点位于以震源和接收器为轨迹的椭圆上时，由反射波的走时和到达反射点的平均速度，确定反射点为多对震源和接收器的椭圆的公切线。(1)等行程时平面方程的推导。(2)椭圆公切线自动绘制算法的开发。(3)将该算法应用于偏移距VSP、井间反射和地面反射方法的模拟数据。(4)结果表明，三维反射法偏移深度剖面的重建精度较高，该算法对计算机内存要求小，计算速度快，适用于现场小型计算机，也适用于掌子面超前探测。

项目成果

Yuzuru Ashida,Koichi Sassa: "Depth Transform of Seismic Data by Use of Equi-Travel Time Planes" Exploration Geophysics. 24. 341-346 (1994)

Yuzuru Ashida、Koichi Sassa：“利用等行程时间平面进行地震数据的深度变换”勘探地球物理学。

Yuzuru Ashida: "Depth Transform of Seismic Data by Use of Equi-Travel Time Planes" Exploration Geophysics. 24. 341-346 (1993)

Yuzuru Ashida：“利用等行程时间平面进行地震数据的深度变换”勘探地球物理学。

Yuzuru Ashida: "Depth transform of seismic data by usa of equi-travel time planes" Exploration Geophysics. 24. 341-346 (1993)

Yuzuru Ashida：“利用等行程时间平面对地震数据进行深度变换”勘探地球物理学。

芦田 譲: "孔井間反射法地震探査データの深度変換" 物理探査. 46. 167-174 (1991)

Yuzuru Ashida：“孔间反射法地震勘探数据的深度转换”地球物理勘探46。167-174（1991）。

芦田譲: "孔井間反射法地震探査データの深度変換" 物理探査. 46. 167-174 (1993)

Yuzuru Ashida：“利用井间反射法进行地震勘探数据的深度转换”地球物理调查46。167-174（1993）。