The long interval method of measuring seismic velocity
The long interval method of measuring seismic velocity
复制标题
长间隔地震速度测量法
DOI：
10.1190/1.1438265
复制
发表时间：
1956
期刊：
影响因子：
--
通讯作者：
F. P. Kokesh
中科院分区：
文献类型：
--
作者：
F. P. Kokesh
地震波速度测定的反向方法，即在钻孔中引爆炸药，已被推广到深井威尔斯中。这是通过使用多点选择性发射声源枪和一个或多个地震检波器的长间隔布置来实现的，地震检波器通过数百英尺长的电缆垂直分离。一系列相对较少的这种间隔可以以良好的精度“捆扎”钻孔行程。在井眼的套管部分上的旅行时间测量通常可以通过放置在表面处或表面附近的地震检波器来完成。以这种方式进行的速度测量与其他服务（如电测井）一起成为常规测井服务。本文概述了必要的现场设备，并给出了现场测量实例。
The reverse method of seismic velocity determination, wherein the shot is detonated in the bore hole, has been extended to operate in deep wells. This has been accomplished by the use of a long interval arrangement of a multi‐shot selective firing sound source gun and one or more geophones separated vertically by a cable several hundred feet long. A series of a relatively few such intervals can “strap” a bore hole travel‐time‐wise with good accuracy. Travel time measurements over the cased portion of the hole can generally be accomplished by means of geophones placed at or near the surface. Velocity surveys conducted in this manner become a routine well logging service, in conjunction with other services such as electrical logs. The paper describes in a general way the necessary field equipment, and field examples of surveys are presented.