|
|
|
| Application of 3C VSP uphole survey technique in near-surface survey |
| Yang Hai-shen1, He Qing-hua2, Liang Xiu-wen1, Dang Xiao-chun1, Kang Da-hao1 |
|
|
|
|
Abstract Uphole survey technique is one of major tools of near-surface survey,but the number of layout of uphole survey is constrained by the higher cost.The paper presented 3C VSP uphole survey technique,i.e.uphole survey pattern adopting shooting in surface and receiving by geophone in hole,the shot-hole in seismic exploration is used as well for uphole surveying.The method not only reduced the cost of uphole survey,but also increased the density of distribution of uphole survey.The T0 times in top interface of high velocity can be used as control points of interpreted near-surface structure if the low-velocity layer of well for the uphole surveying is penetrated through,otherwise,the up-going wave information of VSP can be used to detect the depth and velocity data of beds below the depth of well.
|
|
Received: 11 February 2003
|
|
|
|
|
|
|
|
|
2005, Vol. 40 
