| 发明名称 |
DOWNHOLE DETECTION |
| 摘要 |
A method for use in or for detecting a downhole feature in a well comprises transmitting an electromagnetic signal from a first position located substantially at or adjacent to surface through a first space to the downhole feature. The method further comprises receiving an electromagnetic signal at a second position located substantially at or adjacent to surface after reflection of the transmitted electromagnetic signal from the downhole feature and after propagation of the reflected electromagnetic signal through a second space. The method may comprise sealing the well before transmitting the electromagnetic signal. Such a method may be used to detector determine a distance from surface to a downhole feature such as a fluid interface in a completed production, injection or observation well. |
| 申请公布号 |
US2016115784(A1) |
申请公布日期 |
2016.04.28 |
| 申请号 |
US201414897937 |
申请日期 |
2014.06.13 |
| 申请人 |
WELLDATA (SUBSURFACE SURVEILLANCE SYSTEMS) LTD. |
发明人 |
Littleford Sydney Joseph;Gardiner Christopher Kim;Shepherd Duncan Paul |
| 分类号 |
E21B47/12;G01V3/12;E21B43/12;E21B47/00;E21B33/068 |
主分类号 |
E21B47/12 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method for use in or for detecting a downhole feature in a well, the method comprising:
transmitting an electromagnetic signal from a first position located substantially at or adjacent to surface through a first space to the downhole feature; receiving an electromagnetic signal at a second position located substantially at or adjacent to surface after reflection of the transmitted electromagnetic signal from the downhole feature and after propagation of the reflected electromagnetic signal through a second space. |
| 地址 |
Fife GB |
