[1]张庆乐,杨爱锋.井间电磁成像系统地面与井下同步测量应用研究[J].石油管材与仪器,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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井间电磁成像系统地面与井下同步测量应用研究
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《石油管材与仪器》[ISSN:2096-0077/CN:61-1500/TE]

卷:
5
期数:
2019年05期
页码:
55-58
栏目:
仪器设备与应用
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
文章编号:
2096-0077(2019)05--0055-04
作者:
张庆乐杨爱锋
中国电子科技集团公司第二十二研究所 河南 新乡 453003
Author(s):
ZHANG QingleYANG Aifeng
The 22nd Research Institute of China Electronics Technology Group Corporation, Xinxiang, Henan 453003, China
关键词:
井间电磁成像测井PLL锁相同步电路同步测量频率自适应补偿
Keywords:
crosswell electromagnetic imaging logging PLL phase locked synchronous circuit Synchronous measurementfrequency compensation
分类号:
P631.8+11
DOI:
10.19459/j.cnki.61-1500/te.2019.05.013
文献标志码:
A
摘要:
井间电磁成像利用低频电磁波对两井或多井之间进行多点扫描,测量出电磁信号经过地层产生的相位变化和幅度衰减情况,从而反演出地层的电阻率信息。相位反映地层电参数以及位置的敏感性要优于幅度信息。在进行相位测量时,必须保证对发射信号和接收信号进行同步测量。然而,系统地面与井下的同步测量是保证发射信号和接收信号同步的基础,同时也是重点和难点所在。针对井间电磁成像系统地面与井下同步测量方法展开研究,通过井下设计的PLL锁相同步电路和频率自适应补偿电路,完成了井下工作主频时钟源的建立,提高了电路抗干扰性,使得系统在电缆供
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.

参考文献/References:

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备注/Memo

备注/Memo:
第一作者简介:张庆乐,男,1985年生,2012年毕业于重庆大学电子与通讯专业,获硕士学位,现主要从事石油测井仪器开发。E-mail:wsw-zql@163.com
更新日期/Last Update: 2019-10-25