电磁勘探的新进展-重庆奔腾2013

1、电磁法勘探的新进展吉林大学翁爱华目录 关于瞬变电磁软件应用的思考 三维电磁勘探研究关于瞬变电磁软件应用的思考 瞬变电磁软件 数据处理的重要性 反演方法的正确使用 定性分析解释的重要性瞬变电磁软件 1X1D Emigma 白登海教授的软件 ZONGE公司的软件 地质大学武汉瞬变电磁软件 成都理工大学的软件 GEOELECTRO软件GEOELCTRO软件TEM模块 中心回线(重叠回线)模块 大定源瞬变电磁模块野外数据采集质量的重要性大定源回线装置参数分布图150140130120110100908070605040302010023022021020019018017016015014013012

2、01101009080706050403020100数据质量反演结果-原始数据(第一层10m,总厚度400m深度)反演拟合结果数据编辑编辑后数据反演结果(第一层10m,总厚度400m深度)数据拟合情况编辑后数据反演结果,第一层变为15m,总厚度为800m深度http:/实际找矿例子翁爱华 中心回线瞬变电磁电法软件技术交流会http:/实际找矿例子翁爱华 中心回线瞬变电磁电法软件技术交流会http:/实际找矿例子翁爱华 中心回线瞬变电磁电法软件技术交流会http:/实际找矿例子翁爱华 中心回线瞬变电磁电法软件技术交流会为什么要定性半定量解释?World class EM GroupsCEMI-U

3、tahConsortium for ElectromagneticModeling and Inversion (CEMI) MT3D ver. 2010, release March 2011. The Matlab software package for 3D inversion of the magnetotelluric (MT) data for complex conductivity. The predicted data is calculated rigorously by the INTEM3D - integral equation (IE) modeling code

4、 (Hursan and Zhdanov, 2002). The fast Frechet derivative computation is based on the quasi-analytical approximation with variable background (QAVB) (Gribenko and Zhdanov, 2007a). The standard approach of minimizing the Tikhonov parametric functional (Tikhonov and Arsenin, 1977) is realized in the co

5、de. The regularized conjugate-gradient method with re-weightings and adaptive regularization is used for the parametric functional minimization (Zhdanov, 2002). At the first stage the code uses a minimum norm stabilizer, which produces smooth conductivity distributions. At the consequent stages (re-

6、weightings) the user has a choice of minimum norm, minimum support (Portniaguine and Zhdanov, 1999), minimum vertical support (Gribenko and Zhdanov, 2007b) stabilizers, or their combination. Appropriate selection of the stabilizing functional allows the user to find a solution with sharp geoelectric

7、al boundaries. The code outputs the complex anomalous conductivity distribution, predicted impedance data, and misfit values. The solution and predicted fields can be visualized using the supplementary software provided with the code.MCSEM3D ver. 2011, Release March 2012. The MCSEM3D ver. 2011 is a

8、Matlab software package for 3D inversion of the marine controlled-source electromagnetic (MCSEM) data based on the IE method. The predicted data are calculated rigorously by the INTEM3D integral equation (IE) modeling code. The inversion is based on the regularized conjugate-gradient method with re-

9、weightings and adaptive regularization. The current version of the code can be used for 3D inversion of the in-line MCSEM data., 1 CEMI-UtahConsortium for Electromagnetic Modeling and Inversion (CEMI) is a research and educational program in applied geophysical electromagnetics based at the Universi

10、ty of Utah. It was founded more than twenty five years ago by Prof. G.W. Hohmann and is headed by Prof. M. S. Zhdanov since 1995. The areas of CEMI research interest have been and continue to be gravity, magnetic, and electromagnetic modeling and inversion methods for accurate and efficient geophysi

11、cal data analysis in regions with complex structure.3-D inversion of the marine electromagnetic data for petroleum exploration Fast 3-D inversion of the controlled source electromagnetic data Rapid 3-D interpretation of magnetotelluric data 1 CEMI-UtahMT3D ver. 2010, release March 2011. The Matlab s

12、oftware package for 3D inversion of the magnetotelluric (MT) data for complex conductivity. The predicted data is calculated rigorously by the INTEM3D - integral equation (IE) modeling code (Hursan and Zhdanov, 2002). The fast Frechet derivative computation is based on the quasi-analytical approxima

13、tion with variable background (QAVB) (Gribenko and Zhdanov, 2007a). The standard approach of minimizing the Tikhonov parametric functional (Tikhonov and Arsenin, 1977) is realized in the code. The regularized conjugate-gradient method with re-weightings and adaptive regularization is used for the pa

14、rametric functional minimization (Zhdanov, 2002). At the first stage the code uses a minimum norm stabilizer, which produces smooth conductivity distributions. The solution and predicted fields can be visualized using the supplementary software provided with the code.MCSEM3D ver. 2011, Release March

15、 2012. The MCSEM3D ver. 2011 is a Matlab software package for 3D inversion of the marine controlled-source electromagnetic (MCSEM) data based on the IE method. The predicted data are calculated rigorously by the INTEM3D integral equation (IE) modeling code. The inversion is based on the regularized

16、conjugate-gradient method with re-weightings and adaptive regularization. The current version of the code can be used for 3D inversion of the in-line MCSEM data., 2 EMGSEMGSProcessing large amounts of 3D CSEM data quickly is crucial for our modelling and inversion schemes. That is why we have invest

17、ed in Aurora, the worlds most powerful marine CSEM processing centre.Aurora can handle 70 trillion calculations per second. This processing power is achieved through an assembly of more than 6200 CPU cores in an 1800-node Dell blade cluster. Onshore processingOur inversion schemes can handle any sur

18、vey layout and geological anisotropy, so we can depth convert any EM dataset acquired with any geometry from anywhere in the world.2.5D inversion is a quick and robust way of obtaining resistivity images for the early interpretation and integration of EM data. 3D inversion reconstructs 3D resistivit

19、y cubes by taking full advantage of the combined resolving power of inline and broadside data. Our inversion schemes enable you to integrate CSEM, seismic, well-log and other data. All data and models are provided in SEG-Y format. EMGS-MCSEM3D inversionCustomers use the depth-converted resistivity c

20、ubes we produce through 3D inversion to integrate CSEM, seismic, well-log and other data. 3D inversion can provide a subsurface 3D resistivity distribution that delineates prospects and reservoirs, and places them accurately, both laterally and in depth. The incorporation of full-azimuth data acquir

21、ed in 3D grids enhances the spatial resolution and accuracy of the final 3D resistivity model. The 3D inversion results clearly delineate the Troll reservoir, North Sea, and provide the resistivity distribution within the body. Key featuresIncludes transverse isotropy vertical (TIV), anisotropic and

22、 isotropic inversion Uses 3D EM data to provide 3D resistivity-depth cubes Uses inline and azimuthal data Can use constraints from external data such as seismic horizons Resistivity models delivered in SEG-Y format for easy integration Full-azimuth 3D EM data acquisition Using our high-capacity 3D E

23、M fleet, we acquire full azimuth datasets which provide improved data coverage and resolution. Learn more about: The benefits of full-azimuth 3D EM data acquisition Our high-capacity 3D EM vessels 3 TechnoImaging TechnoImaging provides interpretation and Internet-hosted 3D modeling, migration and in

24、version services for all electromagnetic and potential field methods, including: Marine controlled-source electromagnetics (CSEM) Airborne electromagnetics (AEM) Magnetotellurics (MT) Borehole electromagnetics Induced polarization (IP) Gravity and gravity gradiometry Magnetics and magnetic gradiomet

25、ry EMVision: 3D CSEM modeling, inversion and migrationTechnoImagings EMVision1 provides 3D modeling, 3D inversion and 3D migration services for marine electromagnetic surveys, including the following survey types: Towed transmitter with fixed ocean bottom receiver (e.g., CSEM) Towed transmitter and

26、towed receivers with fixed offset (e.g., towed streamer) Fixed transmitter with towed receivers (e.g., marine electromagnetic remote sensing MEMRS1) Fixed transmitter with fixed receivers (e.g., multi-transient electromagnetics) EMVision can be used to simulate or interpret marine CSEM data for full

27、 field exploration and appraisal models, and/or dynamic reservoir models for time-lapse CSEM. TechnoImaging can also provide CSEM data processing and conditioning services. EMVision can simulate and invert upon 3D resistivity models of arbitrary complexity, including bathymetry and anisotropic resis

28、tivity. 3D a priori resistivity models constructed from seismic interpretations can be included in both inversion and migration. EMVision can model, invert and migrate both frequency- and time-domain inline and azimuthal CSEM data for any of the above listed CSEM survey types. TechnoImaging has deve

29、loped CSEM case studies to demonstrate how it is practical to rigorously invert both 2D and 3D CSEM surveys for 3D resistivity models with approximately one million cells within a day. EMVision incorporates TechnoImagings focusing regularized inversion that enables the recovery of models with sharp

30、conductivity contrasts, rather than models with smooth conductivity distributions. Coupled with fast run-times, this enables multiple inversion scenarios to be explored so as to minimize 3D model uncertainty. EMVision supports data formats from PGS, WesternGeco, EMGS and OHM, and industry standard e

31、arth model formats used by Petrel2 and GoCad/SKUA3. EMVision also enables Internet-hosted 3D CSEM modeling, inversion and migration on TechnoImagings high performance computing resources. Bridge Electromagnetics, 3D EM Forward Modeling Overview:Bridge Electromagnetics is designed for integration of

32、marine Controlled Source EM data, with other subsurface data, utilizing Petrel*, one of the industrys leading geological and geophysical integration platforms. The launch of Bridge brought long awaited functionality for Controlled Source Electromagnetic (CSEM) data to the standard Petrel work flow.

33、The Bridge Electromagnetics (EM) plug-in consists of a series of modules for visualization, data QC, EM attribute analysis, EM forward modeling and EM inversion analysis. The 3D EM Forward Modeling module complements the 2.5D forward modeling with more details when doing a detailed prospect evaluati

34、on. The technology used in the 3D modeling algorithm is based on technology from the Blueback partner TechnoImaging. The Bridge EM Interpretation Loop4 Interpex P.O. Box 839 Golden Colorado 80402 USA http:/ Interpex is a software company dedicated to the production of high quality software for the p

35、rocessing, interpretation and display of geophysical data. IX1DmTEMIX1DmTEM is a 1-D Marine electromagnetic sounding inversion program with the following features:Supports TEM Inline E, crossline H, broadside E, joint inline E with crossline H and (coming soon) multiple offset E-field soundings.Supp

36、orts step current on, step current off or current impulse.Supports Frequency domain inline E and broadside E data.Supports isotropic or anisotropic resistivity models.IX1D has the capability to read in a resistivity well log from a flat ASCII file and the user can interactively reduce the log to sev

37、eral discreet layers by fitting straight line segments to the cumulative conductance in the log. The resulting model can be copied to the model in the current data set for further modeling. The log can be read in as an isotropic or anisotropic (vertical and horizontal) resistivity. For anisotropic m

38、odels, the cumulative resistance is also displayed and can be used to create layer boundaries. 5 GEOELECTROMAGNETIC RESEARCH CENTRE (RUSSIA) The Geoelectromagnetic Research Center was founded in 1993 and is presently one of the Centers of Institute of the Physics of the Earth (IPE RAS). The GEMRC RA

39、S employs now 36 staff, of whom 29 are R&D employes (including 10 Professors and 11 Doctors). Project:Development of new magnetotelluric data processing and 2D/3D inversion techniques with applications to the deep conducrivity studies in the different geological surroundings. 6 CSIRO CSIRO has c

40、onducted research to improve interpretation of electromagnetic survey data for application to minerals and petroleum exploration as well as for environmental applications. Practical three-dimensional electromagnetic inversion for exploration7 MULTI_EMPartners:1.Helmholtz Centre Potsdam GFZ German Re

41、search Centre for Geosciences2.TU Bergakademie Freiberg 3.University of Mnster, Institute for GeophysicsThree-dimensional Multi-Scale and Multi-Method Inversion to Determine the Electrical Conductivity Distribution of the Subsurface Using Parallel Computing ArchitecturesGrayver, R. and Streich, R.,

42、2011, 3D controlled-source EM inversion: strategy and first synthetic studies.8 PetRos EiKon EMIGMA for FEM - Ground and BoreholeBasic, Modelling including 3D models, 1D Inversion, stacked 1d Inversion sections Request a Quotation Premium$1,500EMIGMA for TEM - Ground and BoreholeBasic, 3D Modelling,

43、 1D Inversion including both inloop and out-of-loop Request a Quotation9 Spinifex Geophysics Pty LtdSpinifex Geophysics Pty Ltd. is a Western Australian based geophysics consulting and services company. Serveice: Minerals GeophysicsPotential field (Magnetics and Gravity) data processing and interpre

44、tation. Fourier image processing. 3D inversions. 2D forward modelling. Downhole magnetic modelling. Induced polarisation (IP), electrical resistivity and Magnetotellurics (MT,NSAMT,CSAMT) survey design and interpretation. Surface, downhole and airborne EM survey design and interpretation. 2D and 3D

45、inversions of IP and MT. 10 UBC Geophysical Inversion Facility The UBC-Geophysical Inversion Facility (UBC-GIF) is an academic research unit within the Department of Earth and Ocean Sciences (EOS) at the University of British Columbia (UBC). Our focus is development and application of geophysical fo

46、rward modelling and inversion methodologies. e. Electromagnetics 1. Las Christinas 2. Oil / Gas 3. CSEM inversion pdf 4. 3D borehole TEM pdf 5. 3D MT inversion pdf11 IMAGE Consortium This newly founded consortium involves a major new research collaboration between the Geophysical Inversion Facility

47、(UBC-GIF) and the Scientific Computation and Visualization Group (SCV) at the University of British Columbia. The primary focus is on forward modelling and inversion of 3D (three-dimensional) geophysical electromagnetic data. Inversion and Modelling of Applied Geophysical Electromagnetic data Goals

48、for a 3-year research program Develop fast and accurate 3D (three-dimensional) forward modelling of EM data using vector and scalar potentials. Use new techniques in non-linear optimization to solve the 3D inverse problem by working with the differential equations rather than the integral equations.

49、 Concentrate upon three generic data sets for frequency domain data: MT (Magnetotellurics) CSAMT (Controlled source audio frequency magnetotellurics) Surface and borehole data from a loop source. Develop a 3D forward modelling code for time domain (TEM) data. Attempt the inversion of 3D TEM data. 12

50、 Zonge International Zonge Engineering and Research Organization, Inc has changed its name to Zonge International, Inc. to better reflect the nature and scope of the company. Still an Employee-Owned company with the same ownership and management, Zonge International continues to provide innovative g

51、eophysical field services and instrumentation, specializing in electrical and electromagnetic methods. Starting with minerals exploration in the 1970s, Zonge has since expanded into hydrological, hydrocarbon, environmental, engineering, and unexploded ordnance applications and extended our capabilit

52、ies to include potential field and seismic surveys.13 KMS Technologies- 3DMT KMS Technologies KJT Enterprises Inc. and their alliance partners have developed a software packages to conduct 3D land/marine MT modeling and inversion for oil companies. Forward : the finite difference methodInversion : i

53、mproved RRI (Rapid Relaxation Inversion) algorithmImplemented for PC Cluster system. 3D CSAMT (Controlled Source Audio-Magneto Telluric) Integrated interpretation of 3D MT and seismic data use Landmark or other seismic data interpretation systems Inversion of large size 3D modelFetures Create arbitr

54、ary 3D resistivity models from seismic and logging data Line current source and model responses of 6 EM components Importing observed data: different components of EM field data Calculate plane wave resistivity and phase 3D and 2D model presentation Inversion of 3D model3D tCSEM Modeling 3D land/mar

55、ine time domain Control Source ElectroMagnetics modeling (tCSEM) The arbitrary 3D resistivity model can be built by using two or multiple horizon surfaces from seismic interpretation. wire dipole current source 6 components over the 3D resistivity model. Interpretation by manual fitting 14 Quantecge

56、oscience-canda The Leaders Of Exploration: benefit from True 3D MT + DCIP data collection and inversion.Titan 24 Orion 3D offers you the most accurate and clear picture of the near surface to 1.5 km deep using real 3D data collection. Improving upon Titan 24s sophisticated digital signal processing,

57、 Orion 3Ds multi-directional data is collected and inverted in even higher resolution images. By collecting 1000 times more data per receiver than any other survey system, Orion 3D helps you see targets with greater clarity to reduce exploration risk. Orion 3D Resistivity Response (left) vs. Pseudo

58、3D (offset injection) Resistivity Response (right) 3D MTSpartan MT obtains full tensor data and is set up differently than Quantecs other technologies. The data collected shows simultaneous measurements in multiple directions. By looking at all angles, Spartan MT creates accurate two-dimensional ima

59、ges. The amount of data collected is further refined for sensitivity and accuracy through receiver and expert geophysicist control. The Spartan MT results tell you where, and how deep, to drill for the most rewarding results.Millions of data points are collected and inverted by highly specialised te

60、chnicians and elite software. Using high volume data collection enables more accuracy in the inversion process and increases the resolution so interpretation is more reliable. A 2D inversion is created for accurate drill targeting. 16 ERA In brief, company ERA was established in 1989 year in Saint-Peter