A new method to discriminate between a valid IP response and EM coupling effects

	A new method to discriminate between a valid IP response and EM coupling effects
	Xiang, JP ; Jones, NB ; Cheng, DZ ; Schlindwein, FS
刊名	GEOPHYSICAL PROSPECTING
	2002-11-01
卷号	50 期号:6 页码:565-576
ISSN号	0016-8025
英文摘要	The problem of discrimination between a valid induced polarization (IP) response and electromagnetic (EM) coupling effects is considered and an effective solution is provided. First, a finite dimensional approximation to the Cole-Cole model is investigated. Using the least-squares approach, the parameters of the approximate model are obtained. Next, based on the analysis of overvoltage, a finite dimensional structure of the IP model is produced. Using this overvoltage-based structure, a specific finite dimensional approximation of the Cole-Cole model is proposed. Summarizing the analysis of the finite dimensional IP model, it is concluded that the proposed IP model, which fits the field data much better than the traditional Cole-Cole model, is essentially an RC-circuit. From a circuit-analysis point of view, it is well known that an electromagnetic effect can be described by an RL-circuit. The simulation results on experimental data support this conception. According to this observation, a new method to discriminate between a valid IP response and EM coupling effects is proposed as follows: (i) use a special finite dimensional model for IP-EM systems; (ii) obtain the parameters for the model using a least-squares approach; (iii) separate RC-type terms and RL-type terms - the first models the IP behaviour, the latter represents the EM part. Simulation on experimental data shows that the method is very simple and effective.
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000179266500002
内容类型	期刊论文
源URL	[http://ir.amss.ac.cn/handle/2S8OKBNM/17040]
专题	中国科学院数学与系统科学研究院
通讯作者	Xiang, JP
作者单位	1.Cent S Univ, Changsha 410083, Peoples R China 2.Univ Leicester, Dept Engn, Leicester LE1 7RH, Leics, England 3.Chinese Acad Sci, Inst Syst Sci, Beijing 100080, Peoples R China
推荐引用方式 GB/T 7714	Xiang, JP,Jones, NB,Cheng, DZ,et al. A new method to discriminate between a valid IP response and EM coupling effects[J]. GEOPHYSICAL PROSPECTING,2002,50(6):565-576.
APA	Xiang, JP,Jones, NB,Cheng, DZ,&Schlindwein, FS.(2002).A new method to discriminate between a valid IP response and EM coupling effects.GEOPHYSICAL PROSPECTING,50(6),565-576.
MLA	Xiang, JP,et al."A new method to discriminate between a valid IP response and EM coupling effects".GEOPHYSICAL PROSPECTING 50.6(2002):565-576.