[1]張慶樂,楊愛鋒.井間電磁成像系統地面與井下同步測量應用研究[J].石油管材與儀器,2019,5(05):55-58.[doi:10.19459/j.cnki.61-1500/te.2019.05.013]
 ZHANG Qingle,YANG Aifeng.Application Research on Synchronous Measurement of Ground and Downhole of Crosswell Electromagnetic Tomography System[J].Petroleum Tubular Goods & Instruments,2019,5(05):55-58.[doi:10.19459/j.cnki.61-1500/te.2019.05.013]
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井間電磁成像系統地面與井下同步測量應用研究
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《石油管材與儀器》[ISSN:2096-0077/CN:61-1500/TE]

卷:
5
期數:
2019年05期
頁碼:
55-58
欄目:
儀器設備與應用
出版日期:
2019-10-20

文章信息/Info

Title:
Application Research on Synchronous Measurement of Ground and Downhole of Crosswell Electromagnetic Tomography System
文章編號:
2096-0077(2019)05--0055-04
作者:
張慶樂楊愛鋒
中國電子科技集團公司第二十二研究所 河南 新鄉 453003
Author(s):
ZHANG QingleYANG Aifeng
The 22nd Research Institute of China Electronics Technology Group Corporation, Xinxiang, Henan 453003, China
關鍵詞:
井間電磁成像測井PLL鎖相同步電路同步測量頻率自適應補償
Keywords:
crosswell electromagnetic imaging logging PLL phase locked synchronous circuit Synchronous measurementfrequency compensation
分類號:
P631.8+11
DOI:
10.19459/j.cnki.61-1500/te.2019.05.013
文獻標志碼:
A
摘要:
井間電磁成像利用低頻電磁波對兩井或多井之間進行多點掃描,測量出電磁信號經過地層產生的相位變化和幅度衰減情況,從而反演出地層的電阻率信息。相位反映地層電參數以及位置的敏感性要優于幅度信息。在進行相位測量時,必須保證對發射信號和接收信號進行同步測量。然而,系統地面與井下的同步測量是保證發射信號和接收信號同步的基礎,同時也是重點和難點所在。針對井間電磁成像系統地面與井下同步測量方法展開研究,通過井下設計的PLL鎖相同步電路和頻率自適應補償電路,完成了井下工作主頻時鐘源的建立,提高了電路抗干擾性,使得系統在電纜供
Abstract:
In crosswell electromagnetic tomography, low frequency electromagnetic waves are used for multipoint scanning between two wells or among multiple wells to measure the phase changes and amplitude attenuation generated by electromagnetic signals through strata, thus inverting the resistivity information of the strata. The sensitivity of phase to reflect the electrical parameters and position of the formation is better than one of the amplitude information.In phase measurement, synchronous measurement of transmitted and received signals must be ensured.However, the systematic synchronous measurement between ground and downhole is the basis to ensure the synchronization of transmitted and received signals, and it is also the key and difficult point. In this paper, the accurate synchronous measuring method is explored for ground and downhole. PLL phase locked synchronous circuit and frequency compensation circuit are adopted to establish the clock source of downhole basic working frequency, which improves the antiinterference ability of the circuitand the antijamming ability of the circuit, as well as makes the system achieve the realtime synchronization between the ground and downhole systems under conditions that the power supply current of the cable increases, the burr of the synchronous signal increases and the interference of the environment is large.

參考文獻/References:

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備注/Memo

備注/Memo:
第一作者簡介:張慶樂,男,1985年生,2012年畢業于重慶大學電子與通訊專業,獲碩士學位,現主要從事石油測井儀器開發。E-mail:[email protected]
更新日期/Last Update: 2019-10-25
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