- Home
- Conferences
- Conference Proceedings
- Conferences
EAGE/SEG Research Workshop - Multicomponent Seismic - Past, Present and Future
- Conference date: 05 Sep 2005 - 08 Sep 2005
- Location: Pau, France
- Published: 05 September 2005
41 - 53 of 53 results
-
-
Sensitivity of P-P and P-SV AVO Reflectivity to Fluid Properties in Porous Media – Extension of P-P Results and P-SV Investigation
Authors R.H. Tatham and K.A. BainP06 SENSITIVITY OF P-P AND P-SV AVO REFLECTIVITY TO FLUID PROPERTIES IN POROUS MEDIA: EXTENSION OF P-P RESULTS AND P-SV INVESTIGATION Abstract 1 The objectives of this investigation is two-fold: First to extend the examination of the dynamic effects of variations in relevant fluid properties (permeability and fluid viscosity) on the total P-P wave reflectivity variations with angle of incidence. The reflecting boundaries considered are limited to the interface between two different fluids within a common reservoir sand extending a previous preliminary study but including a realistic description of the fluid models. For fluid-fluid reservoir contacts the AVO effects were
-
-
-
Geometric Attribute Analysis of 3D PS-Converted Waves
Authors C. D‘Agosto, K. Marfurt and R.J. MichelenaP07 GEOMETRIC ATTRIBUTE ANALYSIS OF 3D PS- CONVERTED WAVES Abstract 1 Introduction. Geometric 2 attributes in particular seismic coherence have been widely used in the last years to analyze 3D seismic data since a classic paper by Bahorich and Farmer in 1995. However most of the experience that has been reported so far in the use of geometric attributes is related to conventional 3D P-wave seismic data. There is less experience in the use of geometric attributes to analyze 3D multicomponent data. In this paper we show examples of the use of geometric attributes to analyze 3D PS converted waves
-
-
-
PP and PS Polarities in Correlation of Events and Approximating RPS for AVO
Authors R.J. Brown and A. VanntP08 PP AND PS POLARITIES IN CORRELATION OF EVENTS AND APPROXIMATING RPS FOR AVO Summary 1 R.J. BROWN 1 2 and A. VANT 1 3 1 University of Calgary Department of Geology & Geophysics Calgary Alberta Canada T2N 1N4 2 University of the Faroe Islands Faculty of Science & Technology PO Box 2109 FO-165 Argir Faroe Islands 3 Enervant Consulting Ltd For most interfaces RPP and RPS have opposite sign which means an event usually has the same display polarity on PP and PS seismic sections. In processing and interpreting PS sections we usually rely on correlation of corresponding PS
-
-
-
Borehole Vicinity Acoustic Properties Study Using Offset VSP Data
Authors A. Tikhonov and V. SteninP09 BOREHOLE VICINITY ACOUSTIC PROPERTIES STUDY USING OFFSET VSP DATA Abstract 1 Acoustic properties of the geological section present the source of data for estimation of such important reservoir characteristics as lithologies or porosity. The advantages of borehole seismic over the surface seismic make VSP data attractive for the use in calculations of high-resolution acoustic and shear elastic impedance sections. On the other hand there are a number of factors distorting amplitude anomalies related to acoustic properties variations. This paper describes the attempt to develop a technique for offset VSP data processing preserving true amplitudes. Study Motivation Nowadays inversion of
-
-
-
Full-Wave Attributes for Multicomponent Data Interpretation
By K. ZouP10 FULL-WAVE ATTRIBUTES FOR MULTICOMPONENT DATA INTERPRETATION Abstract 1 Seismic attributes that provide useful interpretation information have been primarily based on PP reflections thus far. Along with the development of multicomponent technology seismic attributes may be extended to include converted PS reflections. In this paper we describe the concept of fullwave attributes that use not only PP reflections but converted-wave (PS-wave) seismic data and joint PP/PS information also. Several meaningful physical definitions of full-wave attributes are provided. Real full-wave attribute results using PS and PP/PS joint inversion in the Gulf of Mexico are presented. By comparing with known production data
-
-
-
Rapid Variations of Azimuthal Anisotropy of Near Surface (Eastern Siberia)
Authors W.V. Karsten, S.B. Gorshkalev, K.A. Lebedev, I.V. Korsunov and V.S. ParasynaP11 RAPID VARIATIONS OF AZIMUTHAL ANISOTROPY OF NEAR SURFACE (EASTERN SIBERIA) W.V.KARSTEN 1 S.B.GORSHKALEV 1 K.A.LEBEDEV 1 I.V.KORSUNOV 2 V.S.PARASYNA 3 Abstract 1 1 Institute for geophysics SB RAS 3 acad. Koptyug ave. 630090 Novosibirsk Russia EAGE/SEG Research Workshop – Pau France 5 – 8 September 2005 2 JSC Eniseygeofizika 3 JSC Gazprom Azimuthal anisotropy of near surface as studied with P- and S-waves data is widely spread in the Urubchen-Tokhomo Zone (UTZ) in the Eastern Siberia and the degree of this anisotropy is very high. It is characterized with rapid lateral changes not only in quantity but in symmetry
-
-
-
Polarization Analysis on Seismic Data after Multicomponent Wavefield Filtering
More LessP12 POLARIZATION ANALYSIS ON SEISMIC DATA AFTER MULTICOMPONENT WAVEFIELD FILTERING Abstract 1 C. PAULUS J. I. MARS Laboratoire des Images et des Signaux Institut National Polytechnique de Grenoble BP 46 Saint Martin d’Hères France Seismic exploration and reservoir study require information conveyed by reflecting waves. In case of multicomponent dataset (3C 4C…) classical methods such as FK filtering τ-p filtering SVD give relatively poor results since they do not take into account all the information conveyed by multicomponent sensors or they require pre-processing. Recently we’ve developed an extension of the Spectral Matrix Filtering method (SMF) called MultiComponent WideBand Spectral Matrix
-
-
-
The Polarization Stack – A Multicomponent Attribute Derived from Vector Infidelity
By J. DellingerP13 Summary THE POLARIZATION STACK: A MULTICOMPONENT ATTRIBUTE DERIVED FROM VECTOR INFIDELITY J. DELLINGER BP EPTG 501 Westlake Park Blvd Houston Texas 77079 USA I present a technique that is analogous to NMO and stack in that it sums over hyperbolic moveout trajectories. However unlike NMO and stack it also collapses the component and time dimensions within a chosen window. Polarizations cannot be summed as scalars; the result of a polarization stack is a matrix that represents the least-squares best-fitting linear relationship between the vector offset and the recorded polarization averaged over all offsets and times within the chosen stacking
-
-
-
Non-Linear AVA-Inversion with Prior Information
By B.E. RommelP14 NON-LINEAR AVA-INVERSION WITH PRIOR INFORMATION Abstract 1 AVA-inversion uses dynamic (viz. amplitude) information of reflection data. While conventional linear 3-term AVA-inversion determines elasticity and density contrasts between two halfspaces nonlinear AVA-inversion as presented here determines elasticity and density directly and it does so in an accurate way. Furthermore non-linear AVO-inversion even benefits from large incidence angles and large elasticity or density contrasts thus allowing the use of the most informative data. Prior information however is required to stabilize the inversion. Introduction 3-term AVA-inversion is usually deemed to be prone to errors but with improved data accuracy – calibrated sources
-
-
-
Multicomponent SWD
Authors G. Bernasconio and M. VassalloP15 MULTICOMPONENT SWD G. BERNASCONI M. VASSALLO Abstract 1 Multicomponent seismic provides direct information about both compressional and shear properties of the subsurface. During the drilling process this information can be crucial to predict overpressured zones and to reduce the ambiguity between variations in pore pressure and variations in lithology. We investigate some aspects of the multicomponent processing in SWD acquisitions. We use the radiation pattern of a working roller-cone drill bit to analyze the subsurface illumination in simple models. Then we migrate synthetic data in order to highlight the information that can be recovered by using P- and S-waves
-
-
-
Joint PP and PS Stratigraphic Inversion for Prestack Time Migrated Multicomponent Data
Authors D. Mace, Y. Agullo, K. Labat, T. Tonellot, A. Bourgeois and M. LavielleP16 JOINT PP AND PS STRATIGRAPHIC INVERSION FOR PRESTACK TIME MIGRATED MULTICOMPONENT DATA Summary 1 The goal of this paper is to improve the determination of a target zone located in a slowly laterally varying background by jointly inverting PP and PS waves available in prestack time migrated multicomponent data while taking into account a priori information (well log data geological knowledge...) in the inversion process: an optimal elastic model is estimated together with an optimal correspondence between PP and PS events. The methodology and results are illustrated on a 2D realistic synthetic example. Introduction YOHAN AGULLO* DANIELE MACE KARINE
-
-
-
The Application of Joint P-Wave and PS Converted Wave in Detecting of Gas Reservoir
More LessP17 THE APPLICATION OF JOINT P-WAVE AND PS CONVERTED WAVE IN DETECTING OF GAS RESERVOIR Abstract 1 The use of converted PS-waves to image reservoirs with low P-wave impedance but high S-wave impedance has attracted considerable interest in offshore exploration. However little progress has been made on the application of converted wave technology to onshore exploration. Here we present an example of using converted-wave for characterizing onshore gas reservoirs in the Ordos basin in Northwest China. The Ordos basin is the largest gas province in China. The main gas reservoirs are upper Paleozoic sandstone that has low or reversed P-wave
-
-
-
Applying Advance Processing to Enhance Seismic Interpretation Farigh Area Eastern Basin, Libya
More LessP18 APPLYING ADVANCE PROCESSING TO ENHANCE SEISMIC INTERPRETATION FARIGH AREA EASTERN SIRTE BASIN LIBYA 1 1 1 2 R. KHALIL A. NAJAH & F. BELHAJ 1 Veba Oil Operations P O Box 690 Tripoli Libya 2 th TPOC Exploration Dept. Burj Al Fatah 9 Floor-Tripoli Libya The Farigh Oil Field is located in eastern Sirt Basin. The basin is considered the most prolific hydrocarbon in North Africa (Figure 1). The intracratonic rifted Sirte Basin started during the Lower Cretaceous time and ended in the Tertiary time. The basin was formed by a series of horsts and grabens resulted from the
-