Influence of Communication Slots on Signal of Electromagnetic Propagation Measurement while Drilling
详细信息
- 责任者：Wei Baojun (College of Physical Science and Technology ; China University of Petroleum ; Dongying 257061 ; China) ; Xu Dan
- 刊名：Journal of China University of Petroleum
- 出版年：2011
- 卷期：35(1)
- 关键词：电磁波 ; electromagnetic waves ; 随钻测量 ; measurement while drilling
- 页码：p.56-60
- 图表：6 illus., 9 refs.
- 分类号：1600
- issnNo：ISSN1673-5005
- isbnNo：CN37-1441/TE
摘要
The Green’s function in radially stratified media was used to analyze the influence of parameters such as the length and number of communication slots on the signal of electromagnetic propagation measurement while drilling (MWD). The results show that the electromagnetic attenuation can be reduced by increasing the length and number of communication slots, but the change of attenuation will be indistinct after these parameters have reached to some value. Generally the length is chosen as 0.1 m and the number are chosen less than 20, which can satisfy the engineering need. And the electromagnetic attenuation caused by the packing material can be neglected if its conductivity is low.