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Seismic Survey Technologies
Guidelines for Authors
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ОТ ГЛАВНОГО РЕДАКТОРА
Role of Wave Field Diffraction Component in Seismic Imaging
Medium and small-scale structural details and heterogeneities of a medium, like faults, karsts, fracturing and so on, are of crucial importance for prospecting and development of unconventional oil and gas reservoir. Such details and heterogeneities are a source of diffracted waves, carrying information about scattering objects. Using these waves for detection, identification and characterization of the small-scale heterogeneities is complicated due to the weak intensity of the wave field diffraction component and the strong interference with the specular reflections that mask the diffraction. Hence, amplification of the diffraction component and its extraction from the total wave field has become a key problem in applying the diffraction for detection and characterization of the small-scale elements of a medium.
In this publication we consider different approaches to detection and extraction of diffracted waves from a total wave field with strong specular reflections. These approaches are based on the kinematic and dynamic features of the waves and are applicable in different physical and mathematical spaces. The paper reviews the methods and algorithms of wave field separation and diffraction imaging that allow reliable detection of the small-scale elements. The effectiveness of the techniques presented has been confirmed both on real and synthetic data that proves the feasibility of the proposed algorithms and demonstrates the potential of the wave field diffraction component use for resolution enhancement of the seismic method.
OPERA (Applied Geophysical Research Group), 64013, Pau, Avenue de l’Universitй, BP 1155, France, e-mail:
V.B. Leviant*, I.B. Petrov**, M.V. Muratov**, S.A. Byko**
Stability of P-to-S scattering off a System of Fractures
The patterns of
fracture scattering are simulated for conditions of real reflection surveys. The modelling is performed to see how scattering stability depends on departure from the ideal case (curved or stepped geometry, irregular spacing, and non-parallelism of fractures) and to check whether the earlier results for plane-wave incidence apply to scattered seismic energy from point shots used in the field practice.
The obtained single fracture seismic responses change insignificantly if the shift off the fracture axis in stepped fractures is 0.2 to 0.4 m, which is a realistic value. The scattering responses of a fracture cluster are quite stable to moderate non-parallelism (30 – 40 % of dip) and spacing irregularity of fractures.
Clusters of vertical fractures are well resolvable in the
-component of multi-component (
) CMP data corrected for geometrical spreading if the responses at receivers right and left of the shot are stacked separately.
*OJSC Central Geophysical Survey, 38, Narodnogo Opolcheniya str., bld. 3, Moscow, 123298, Russia
**Moscow Institute for Physics and Technology (State University), 9, Institutskii lane, Dolgoprudnyi, Moscow Region, 141700, Russia,
V.V. Lisitsa*, V.A. Pozdnyakov**, G.V. Reshetova***, V.G. Khaidukov*, V.A. Cheverda*, V.V. Shilikov****
Scattered Seismic Responses: Simulation and Imaging Part 1. Two-Dimensional Media
The modern theory of scattering allows quantifying the energy scattered off heterogeneities. Numerical modelling is the only way to investigate the scattered component. We explore wave propagation in media containing clusters of small scatterers using finite-difference modelling with local space-time grid refinement. With this method, snapshot images and synthetic seismograms of multi-offset reflections have been generated for a typical seismic-geological model of the Yurubchen-Tokhoma oilfield. Object-based migration applied to the synthetic data has allowed weighted superposition of images of the regular and singular objects. Thus, it becomes possible to use scattered energy as a new seismic attribute and to determine its relation with the concentration of small-scale voids in reservoirs.
*Trofimuk Institute of Petroleum Geology and Geophysics, of SB RAS, Acad. Koptyuga prosp., 3, Novosibirsk, 630090, Russia, e-mail:
**Siberian Federal University, 79, Svobodny av., Krasnoyarsk, 660041, Russia, e-mail:
***Institute of Computational Mathematics and Mathematical Geophysics SB RAS, Acad. Lavrentjeva prosp., 6, Novosibirsk, 630090, Russia, e-mail:
****Ltd “RN-KrasnoyarskNIPIneft”, Partizana Geleznyaka str., 24B, Krasnoyarsk, 660022, Russia,
Multivariate Reservoir Prediction from 3D Seismic Data
It is suggested to perform multivariate reservoir prediction using elements of the fuzzy set theory coupled with common tools of mathematical statistics. The multivariate approach has been applied to net pay predictions for oilfields in the Perm region.
Рost Сontrol of Shot Environments and Real Shot Depth
Due to the fact of growing requirements for accuracy and reliability of seismic 2D (3D) CRM–CDP data acquisition results, the problem of providing of optimal shot environment (for detonations in shotholes) is becoming the most pressive challenge and corresponding methodical and technological ways for ex post facto control of shot environment and real shot depth are needed.
Some case studies of such control are considering in this paper as with the involvement of data of specialized seismic works (multilevel seismic technology, reciprocal up-hole velocity survey) as on a basis of standard CRM–CDP seismic data processing (taking into account a real-life experience and data processing principles for specialized seismic studies).
LLC “NOVATEK STC”, Cheluskintsev str., 6/1, Tyumen, 625000, Russia, e-mail:
V.M. Kuznetsov*, G.A. Shekhtman*, A.V. Cherepovski**
Technical Means in Multicomponent Seismic
A review article describes the technical means used for multicomponent seismic exploration in boreholes, on land, and at sea in Russia and overseas. The authors point out the types of elastic wave sources used on land and at sea, equipment for data acquisition in land, marine, and transition-zone multicomponent seismic, as well as equipment for borehole seismic investigations.
*“Geophysical data systems” Ltd, 117198, Moscow, E-313, Leninsky prosp., 113/1, Russia, e-mail:
**Sercel, 109028, Moscow, Tessinsky lane, 4, building 1, Russia, e-mail:
A.G. Vershinin, S.A. Vershinin, S.V. Dobrynin
Designing a cross-dipole full-wave sonic logging tool using finite-element modeling
A new cross-dipole full-wave sonic logging tool, AMAK90D, has been designed using finite-element modeling. The development meets the urgent demand for an advanced domestic instrument to compete with foreign analogues that dominate the market of geophysical services. The suggested approach has allowed valuable engineering solutions and practical recommendations for the tool configuration, and saved the time and costs of the design project. As metrological and field tests show, the tool created with reference to modeling results matches its counterparts of the last generation.
OJSC “Megapoint”, 40/3, Narodnogo Opolcheniya str., Moscow, Russia, 123298, e-mail:
V.V. Kapustin*, N.P. Semeikin**, V.V. Monakhov*, V.N. Trushkov**
А hardware-software system and methods for monitoring natural and industrial cyclic loads
A hardware-software system and related methods have been created for monitoring dynamic (vibration) loads on soils. The system provides data on dynamic parameters of the ground and vibration velocities (or acceleration). The use of downhole sensors allows obtaining both lateral and vertical patterns of vibration parameters. Surveys with the new instruments and methods are designed to study the effects of natural and industrial vibration fields on soil bodies and engineering structures. The developed methods of data acquisition and processing contribute to the progress of vibration monitoring during construction and operation of structures and facilities.
*“NII Geotech”, Entuziastov str., 5, Bldg. 39, Moscow, 111024, Russia, e-mail:
**“LOGIS”, 100-i Svirskoy dizii str., 11, Moscow region, Ramenskoe, 140104, Russia, e-mail:
Рецензия на монографию В.Н. Трояна, Ю.В. Киселева “Анализ и обработка данных”