Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.p007
G. Xia, R. Crider
P007 Q-COMPENSATION BY LEAST SQUARES MIGRATION Summary 1 An efficient and stable poststack Q compensation method based on wavefield extrapolation and migration principle is presented. Our inverse Q filter compensates for both amplitude decay and phase dispersion and handles detailed Q variation with depth. A least squares extrapolation operator is used to stabilize the inverse filter. A real data example of Q compensation application shows higher resolution balanced spectrum and improved well ties. Introduction The earth absorbs energy as sound waves travel through. In seismic experiments wave scattering and inter-bed multiples also contribute to attenuation (O’Doherty & Anstey 1971). Regardless
{"title":"Q-Compensation by Least Squares Migration","authors":"G. Xia, R. Crider","doi":"10.3997/2214-4609-pdb.3.p007","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.p007","url":null,"abstract":"P007 Q-COMPENSATION BY LEAST SQUARES MIGRATION Summary 1 An efficient and stable poststack Q compensation method based on wavefield extrapolation and migration principle is presented. Our inverse Q filter compensates for both amplitude decay and phase dispersion and handles detailed Q variation with depth. A least squares extrapolation operator is used to stabilize the inverse filter. A real data example of Q compensation application shows higher resolution balanced spectrum and improved well ties. Introduction The earth absorbs energy as sound waves travel through. In seismic experiments wave scattering and inter-bed multiples also contribute to attenuation (O’Doherty & Anstey 1971). Regardless","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126898264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.e030
N. Bournas, M. Hamoudi, A. Galdeano, K. Ouzegane, J. Kienast
E030 THE AEROMAGNETIC MAP OF HOGGAR (TUAREG SHIELD ALGERIA). PROCESSING AND INTERPRETATION 1 N. BOURNAS 1 M. HAMOUDI 2 A. GALDEANO 3 K. OUZEGANE 2 AND J.R. KIENAST 4 1 University of Boumerdes Department of Geophysics Ave de l’independence Boumerdes 35000 Algeria 2 Univeriste de Bab Ezzouar Algeria 3 IPGP France 4 Universite Paris VII France Abstract The Tuareg shield represents a part of the transsaharan Panafrican belt and is composed of Hoggar Air and the Iforas mountains. Historically the Hoggar is subdivided into three main structural blocks with different geology and separated by two mega shear zones (Bertrand and
E030 hoggar(阿尔及利亚图阿雷格盾)航磁图。处理和解释1 n. bournas 1 m. hamoudi 2 a。Galdeano 3 k。图阿雷格地盾是泛非带的一部分，由Hoggar Air和Iforas山脉组成。图阿雷格地盾是泛非带的一部分。历史上，Hoggar被细分为三个主要的构造块，具有不同的地质特征，并被两个巨型剪切带(Bertrand和
{"title":"The Aeromagnetic Map of Hoggar (Tuareg Shield, Algeria) – Processing and Interpretation","authors":"N. Bournas, M. Hamoudi, A. Galdeano, K. Ouzegane, J. Kienast","doi":"10.3997/2214-4609-pdb.3.e030","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.e030","url":null,"abstract":"E030 THE AEROMAGNETIC MAP OF HOGGAR (TUAREG SHIELD ALGERIA). PROCESSING AND INTERPRETATION 1 N. BOURNAS 1 M. HAMOUDI 2 A. GALDEANO 3 K. OUZEGANE 2 AND J.R. KIENAST 4 1 University of Boumerdes Department of Geophysics Ave de l’independence Boumerdes 35000 Algeria 2 Univeriste de Bab Ezzouar Algeria 3 IPGP France 4 Universite Paris VII France Abstract The Tuareg shield represents a part of the transsaharan Panafrican belt and is composed of Hoggar Air and the Iforas mountains. Historically the Hoggar is subdivided into three main structural blocks with different geology and separated by two mega shear zones (Bertrand and","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126702355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.p206
O. Kirstetter, C. Reiser, D. Lecerf, A. McInally, P. Conway, K. Flanagan
P206 DATA PRE-CONDITIONING FOR 4D STRATIGRAPHIC INVERSION A CASE STUDY: THE GRYPHON FIELD Abstract 1 4D pre-stack stratigraphic inversion is performed on the Gryphon field using two 3D seismic vintages (1990 and 2002). The goal of the study is to image saturation changes within the Balder formation and within the injected sands in the Upper Balder and Frigg formations pressure changes being negligible. Starting from time-migrated pre-stack data 6 angle stack volumes are generated for each vintage on which data pre-conditioning is performed to optimize the 4D difference prior to the inversion. Common seismic cubes are thus computed between adjacent
{"title":"Data Pre-Conditioning for 4D Stratigraphic Inversion – A Case Study – The Gryphon Field","authors":"O. Kirstetter, C. Reiser, D. Lecerf, A. McInally, P. Conway, K. Flanagan","doi":"10.3997/2214-4609-pdb.3.p206","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.p206","url":null,"abstract":"P206 DATA PRE-CONDITIONING FOR 4D STRATIGRAPHIC INVERSION A CASE STUDY: THE GRYPHON FIELD Abstract 1 4D pre-stack stratigraphic inversion is performed on the Gryphon field using two 3D seismic vintages (1990 and 2002). The goal of the study is to image saturation changes within the Balder formation and within the injected sands in the Upper Balder and Frigg formations pressure changes being negligible. Starting from time-migrated pre-stack data 6 angle stack volumes are generated for each vintage on which data pre-conditioning is performed to optimize the 4D difference prior to the inversion. Common seismic cubes are thus computed between adjacent","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133530151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.p271
K. Kaiser, D. Criddle, J. Colleran, S. Loutit, W. Sumner
P271 WELL LOCATION OPTIMISATION THROUGH USE OF SEISMIC ATTRIBUTES ON THE BRITANNIA FIELD UK NORTH SEA Summary 1 Britannia field seismic attributes now allow better well placement through improved reservoir characterisation and identification of drilling hazards. This is mainly due to greatly improved seismic data quality through the reprocessing of an old survey and the acquisition of a new one. In addition reservoir property prediction through use of seismic attributes has the potential to yield a significant number of new well locations in various areas of the field. Prediction accuracy will be put to the test with a well to
{"title":"Well Location Optimisation through Use of Seismic Attributes, on the Britannia Field, UK North Sea","authors":"K. Kaiser, D. Criddle, J. Colleran, S. Loutit, W. Sumner","doi":"10.3997/2214-4609-pdb.3.p271","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.p271","url":null,"abstract":"P271 WELL LOCATION OPTIMISATION THROUGH USE OF SEISMIC ATTRIBUTES ON THE BRITANNIA FIELD UK NORTH SEA Summary 1 Britannia field seismic attributes now allow better well placement through improved reservoir characterisation and identification of drilling hazards. This is mainly due to greatly improved seismic data quality through the reprocessing of an old survey and the acquisition of a new one. In addition reservoir property prediction through use of seismic attributes has the potential to yield a significant number of new well locations in various areas of the field. Prediction accuracy will be put to the test with a well to","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133784137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.p312
D. Kiyashchenko, R. Plessix, B. Kashtan
P312 IMPROVED AMPLITUDE MULTI-STEP ONE- WAY MODELLING Abstract 1 A modelling method based on the application of one-way technique is presented. In order to obtain a correct amplitude behaviour using the perturbation theory the error due to the factorisation of the two-way wave operator by the downgoing and upgoing one-way wave equation is taken into account as a source term in an additional set of one-way equations. This multi-step one-way approach improves the amplitudes when the models vary vertically and horizontally. Several examples with smooth and rough contrasts are shown and compared with the results of the two-way wave equation
{"title":"Improved Amplitude Multi-Step One-Way Modelling","authors":"D. Kiyashchenko, R. Plessix, B. Kashtan","doi":"10.3997/2214-4609-pdb.3.p312","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.p312","url":null,"abstract":"P312 IMPROVED AMPLITUDE MULTI-STEP ONE- WAY MODELLING Abstract 1 A modelling method based on the application of one-way technique is presented. In order to obtain a correct amplitude behaviour using the perturbation theory the error due to the factorisation of the two-way wave operator by the downgoing and upgoing one-way wave equation is taken into account as a source term in an additional set of one-way equations. This multi-step one-way approach improves the amplitudes when the models vary vertically and horizontally. Several examples with smooth and rough contrasts are shown and compared with the results of the two-way wave equation","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129228061","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.b019
J. Mallet, R. Moyen, T. Frank, L. Castanie, B. Leflon, J. Royer
B019 GETTING RID OF STRATIGRAPHIC GRIDS Abstract 1 The implementation of any geostatistical method requires the use of a parametric coordinate system (u v t) such that (u v) corresponds to “horizontal” curvilinear coordinates tangent to the horizons while (t) corresponds to the “vertical” curvilinear axis approximately orthogonal to the horizons. So far common practice consists in covering the geological domain with a “structured stratigraphic grid” and then to use the (i j k) indexes as a sampling of the (u v t) coordinates. In this article we propose a completely different approach based on the recently introduced “GeoChron” model
摘要1任何地质统计学方法的实施都需要使用参数坐标系(u v t)，其中(u v)对应于与地平线相切的“水平”曲线坐标，而(t)对应于与地平线近似正交的“垂直”曲线轴。到目前为止，通常的做法是用“结构化地层网格”覆盖地质领域，然后使用(i j k)指数作为(u v t)坐标的抽样。在本文中，我们基于最近引入的“GeoChron”模型提出了一种完全不同的方法
{"title":"Getting Rid of Stratigraphic Grids","authors":"J. Mallet, R. Moyen, T. Frank, L. Castanie, B. Leflon, J. Royer","doi":"10.3997/2214-4609-pdb.3.b019","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.b019","url":null,"abstract":"B019 GETTING RID OF STRATIGRAPHIC GRIDS Abstract 1 The implementation of any geostatistical method requires the use of a parametric coordinate system (u v t) such that (u v) corresponds to “horizontal” curvilinear coordinates tangent to the horizons while (t) corresponds to the “vertical” curvilinear axis approximately orthogonal to the horizons. So far common practice consists in covering the geological domain with a “structured stratigraphic grid” and then to use the (i j k) indexes as a sampling of the (u v t) coordinates. In this article we propose a completely different approach based on the recently introduced “GeoChron” model","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132438982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G040 SEPARATION OF PRIMARIES AND MULTIPLES BY NON-LINEAR ESTIMATION IN THE CURVELET DOMAIN Abstract FELIX J. HERRMANN 1 and ERIC VERSCHUUR 2 1 Department of Earth and Ocean Sciences University of British Columbia Canada 2 Faculty of Applied Sciences Delft University of Technology The Netherlands Predictive multiple suppression methods consist of two main steps: a prediction step in which multiples are predicted from the seismic data and a subtraction step in which the predicted multiples are matched with the true multiples in the data. The last step appears crucial in practice: an incorrect adaptive subtraction method will cause multiples to
摘要FELIX J. HERRMANN 1和ERIC VERSCHUUR 21加拿大英属哥伦比亚大学地球与海洋科学系2荷兰Delft理工大学应用科学学院预测多重抑制方法主要包括两个步骤:从地震数据中预测倍数的预测步骤和将预测倍数与数据中的真实倍数匹配的减法步骤。最后一步在实践中显得至关重要:不正确的自适应减法方法会导致倍数
{"title":"Separation of Primaries and Multiples by Non-Linear Estimation in the Curvelet Domain","authors":"F. Herrmann, D. Verschuur","doi":"10.14288/1.0107382","DOIUrl":"https://doi.org/10.14288/1.0107382","url":null,"abstract":"G040 SEPARATION OF PRIMARIES AND MULTIPLES BY NON-LINEAR ESTIMATION IN THE CURVELET DOMAIN Abstract FELIX J. HERRMANN 1 and ERIC VERSCHUUR 2 1 Department of Earth and Ocean Sciences University of British Columbia Canada 2 Faculty of Applied Sciences Delft University of Technology The Netherlands Predictive multiple suppression methods consist of two main steps: a prediction step in which multiples are predicted from the seismic data and a subtraction step in which the predicted multiples are matched with the true multiples in the data. The last step appears crucial in practice: an incorrect adaptive subtraction method will cause multiples to","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115462427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.p011
A. Kritski, L. Amundsen
P011 SHEAR WAVE VELOCITY DETERMINATION BY WAVELET CROSS-CORRELATION ANALYSIS OF TUBE WAVES IN VSP DATA Summary 1 In order to estimate the formation’s shear wave velocities from vertical seismic profiling (vsp) data a new signal programming technique based on the wavelet transform and crosscorrelation is developed. The wavelet cross-correlation method (wcr) offers a potential in estimating shear velocities in situations where such velocities are difficult or impossible to measure using known direct methods when shear energy transmission is attenuated or shear wave arrivals are obscured by other type wave arrivals reflected and refracted. The developed method measures the tube (surface)
{"title":"Shear Wave Velocity Determination by Wavelet Cross-Correlation Analysis of Tube Waves in VSP Data","authors":"A. Kritski, L. Amundsen","doi":"10.3997/2214-4609-pdb.3.p011","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.p011","url":null,"abstract":"P011 SHEAR WAVE VELOCITY DETERMINATION BY WAVELET CROSS-CORRELATION ANALYSIS OF TUBE WAVES IN VSP DATA Summary 1 In order to estimate the formation’s shear wave velocities from vertical seismic profiling (vsp) data a new signal programming technique based on the wavelet transform and crosscorrelation is developed. The wavelet cross-correlation method (wcr) offers a potential in estimating shear velocities in situations where such velocities are difficult or impossible to measure using known direct methods when shear energy transmission is attenuated or shear wave arrivals are obscured by other type wave arrivals reflected and refracted. The developed method measures the tube (surface)","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121496860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.b038
S. Sherkati, J. Letouzey
B038 MODELING THE EFFECT OF DECOLLEMENT LEVELS ON STYLE OF FOLDED STRUCTURES APPLICATION TO THE ZAGROS FOLDS 1 SHAHRAM SHERKATI 1 & JEAN LETOUZEY 2 1 National Iranian Oil Company Yaghma allay Jomhuri Ave. Tehran-Iran The geometry of the folds vary significantly in horizontal and vertical directions in Zagros orogenic belt despite having been subjected to a similar compressional regime. Structural style change from simple isopachly folded large anticlines to chevron type folds which cored by complex compressional structures and to small folds overlie widely spaced anticlines cut by major thrust faults. They show close relationship with different mechanical behavior
{"title":"Modeling the Effect of Decollement Levels on Style of Folded Structures, Application to the Zagros Folds","authors":"S. Sherkati, J. Letouzey","doi":"10.3997/2214-4609-pdb.3.b038","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.b038","url":null,"abstract":"B038 MODELING THE EFFECT OF DECOLLEMENT LEVELS ON STYLE OF FOLDED STRUCTURES APPLICATION TO THE ZAGROS FOLDS 1 SHAHRAM SHERKATI 1 & JEAN LETOUZEY 2 1 National Iranian Oil Company Yaghma allay Jomhuri Ave. Tehran-Iran The geometry of the folds vary significantly in horizontal and vertical directions in Zagros orogenic belt despite having been subjected to a similar compressional regime. Structural style change from simple isopachly folded large anticlines to chevron type folds which cored by complex compressional structures and to small folds overlie widely spaced anticlines cut by major thrust faults. They show close relationship with different mechanical behavior","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122571539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2004-06-07DOI: 10.3997/2214-4609-pdb.3.p246
B. Caline, E. Zuckmeyer, P. Charpentier, P. Masse, M. Thu, P. Ronchi
P246 REGIONAL DISTRIBUTION OF THE EOCENE CARBONATE RESERVOIRS OF THE METLAOUI GROUP (C137 & NC41 OFFSHORE LIBYA) Objective and method The objective of the poster is to illustrate the main parameters which control both the regional and local distribution of Eocene carbonate reservoirs located in offshore Libya. These reservoirs include the nummulite limestone of the El Gueria Formation and the dolomite of the Chouabine Formation. The method has resulted in a geological model constrained by the integration of merged 3D seismic well and core data from C137 and NC41 areas respectively operated by Total and ENI. Regional framework The regional
{"title":"Regional Distribution of the Eocene Carbonate Reservoirs of the Metlaoui Group (C137 & NC41, Offshore Libya)","authors":"B. Caline, E. Zuckmeyer, P. Charpentier, P. Masse, M. Thu, P. Ronchi","doi":"10.3997/2214-4609-pdb.3.p246","DOIUrl":"https://doi.org/10.3997/2214-4609-pdb.3.p246","url":null,"abstract":"P246 REGIONAL DISTRIBUTION OF THE EOCENE CARBONATE RESERVOIRS OF THE METLAOUI GROUP (C137 & NC41 OFFSHORE LIBYA) Objective and method The objective of the poster is to illustrate the main parameters which control both the regional and local distribution of Eocene carbonate reservoirs located in offshore Libya. These reservoirs include the nummulite limestone of the El Gueria Formation and the dolomite of the Chouabine Formation. The method has resulted in a geological model constrained by the integration of merged 3D seismic well and core data from C137 and NC41 areas respectively operated by Total and ENI. Regional framework The regional","PeriodicalId":110744,"journal":{"name":"66th EAGE Conference & Exhibition","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-06-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116849990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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