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Seismic Survey Technologies
Guidelines for Authors
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S.I. Shlionkin, A.V. Masjukov, V.V. Masjukov, A.N. Kozlova
SEISMIC COHERENCE AND SINGULARITIES
The authors propose techniques for coherence volume computation and ant colony simulation for seismic 3D data. The techniques proposed have been compared with competing state-of the-art methods in real-data examples.
Geophysical Center, Slavneft Oil and Gas Company, Ltd.,
170002, Tver, Chaykovsky av., 21A, Russia, e-mail:
V.L. Trofimov, F.F. Khaziev, V.A. Milashin
DYNAMIC CHARACTERISTICS OF THE REFLECTIONS, WITH THE CONTRIBUTION FROM ELEMENTARY BOUNDARIES AND STRATA HONORED
A software system, developed to model dynamic characteristics of reflections, has facilitated the study of how an interference wavefield and its dynamic parameters are formed in a target interval and how elementary boundaries and strata contribute to the dynamic characteristics. A notion of “contribution interference matrix” is introduced to help study the manifestation of interference wavefield and its dynamic characteristics; the matrix being a rectangular table where information (contribution) on a geologic formation parameter is entered as wavefield characteristics or as a wavefield transformation results. Interference wavefields of acoustic impedance section transforms, of instantaneous amplitudes, phases and frequencies, and of deconvolved seismic data exhibit interference effects as layered decomposition of traces of such characteristics (local curves of wave dynamic parameters).
Megacenter-Plyus Ltd., 123298, Moscow, Narodnogo Opolcheniya str., 40, Bldg. 3, Russia,
K.A. Epov, O.O. Adamovich
SEMIAUTOMATIC METHOD OF MEDIUM WAVELENGTH STATIC CALCULATIONS
This paper presents fast algorithm of statics corrections calculations based on known reflection times. The grounds of the method are data transformation into a spatial frequency domain. In the article the accuracy and method restrictions are analyzed, relationship with other methods is shown, and the main aspects of practical algorithm application are discussed. This method allows reasonable regularization approach to the solution of an overdetermined equation system that arise in the classical formulation of surface-consistent statics computation problem. The method can be applied not only for statics corrections but for solving any other surface-consistent problem (surface consistent amplitude corrections, surface-consistent filtering, etc). The article also addresses the issue of practical aspects of algorithm realization for 3D surveys.
“Geophysical data systems” Ltd, 117198, Moscow, Е-302, Leninsky prosp., 113/1, Russia, e-mail:
V.B. Leviant*, I.B. Petrov**, S.A. Pankratov**
NUMERICAL SIMULATION FOR INVESTIGATION OF RESPONSE FROM SUBVERTICAL MEGAFRACTURES OF OIL AND GAS DEPOSITS
The article presents numerical modeling of elastic wave propagation in an isotropic medium with a subvertical megafracture of the height about the length and the width about 1/6–1/20 of the seismic wave. The modeling has been performed using the grid characteristic method. The structure and features of diffracted waves, forming the seismic response from the fracture under different versions of its internal structure as well as its geometric parameters (height and thickness) have been investigated. The internal structure defines the vertical permeability, gas or fluid saturation. The diffracted waves have been detected to be the main source of information about the megafracture. In the multilayered medium the waves are recorded under underlying layers: reflected from borders waves, initiated by defracted ones and as secondary reflected waves from the megafracture (duplex reflection). The usage of such waves is difficult due to low time resolution and the interference.
*Central Geophysical Expedition, PLC 123298, Moscow, Narodnogo Opolcheniya str., 38, Bldg. 3, Russia, e-mail:
**Moscow Institute of Physics and Technologies – MIPT, Institutsky per., 9, Moscow oblast, Dolgoprudny, 141700, Russia, e-mail:
S.V. Lyagushov, I.A. Peshkova
DIVISION OF UPPER JURASSIC SEDIMENTS IN WEST SIBERIA FROM 3D SEISMIC SURVEYS: A CASE STUDY OF AN OIL FIELD IN THE LATITUDE OB’ AREA
Upper Jurassic sediments are principal producing oil reservoirs in West Siberia. However stacked seismic data cannot resolve reservoir properties of this interval because strong reflection from the Bazhenov formation surface screens reflections from reservoir beds. Applying successively different techniques of 3D seismic and log data inversion makes it possible to determine pay zones within Upper Jurassic sediments, to study their geology, and to estimate their porosity and permeabily. The inversion results may highlight pretty unexpected details relevant for understanding depositional environments that elude detection from seismic amplitude cubes.
Center for Geophysical Seismic Surveys, LUKOIL-Engineering Limited KogalymNIPIneft Branch Office in Tyumen, 625000, Tyumen, Respubliki str., 41, Russia,
A.A. Glebov, E.I. Bykova
3D SEISMODYNAMIC METHOD OF ESTIMATING RESOURCE POTENTIAL OF UPPER JURASSIC UNSTRUCTURED PETROLEUM ACCUMULATION OF KOGALYM OIL ZONE
The Upper Jurassic bed JS11 in the Kogalym oil zone shows a mosaic pattern of oil-water contact observed during tests, which implies the lack of structural control of oil fields. For assessing resource potential of JS11 we suggest a model of hydrodynamically disconnected multi-facies sand beds derived from several 3D seismic attributes. Within the limits of the research area, the estimated recoverable oil reserves in undeveloped fields exceed 3 mln tons.
OOO “LUKOIL-Engineering”, 127055, Moscow, str. Suschevsky Val, 2, Russia, e-mail:
A.S. Salnikov, B.A. Kanareikin, S.V. Dolgova, K.A. Dunaeva, O.M. Sagaidachnaya, A.S. Kharlamov
TRANSMITTED-WAVE SEISMIC TOMOGRAPHY FOR KUZNETSK COAL BASIN: TECHNOLOGY AND RESULTS
The paper presents a synthesis of transmitted-wave seismic data from the Kuznetsk Basin mines (2010–2011) collected using РОСА-А autonomous stations [patents (RU) No. 2331087, No. 2366981]. The wavefields of transmitted waves along the coal bed have been processed by the seismic tomography method. Velocities of channel waves image the best the coal bed structure. Transmitted-wave seismic tomography appears to be an effective tool to optimize the technology of coal development.
Siberian Research Institute of Geology, Geophysics, and Mineral Resources, 630091, Novosibirsk, Krasnyi prosp., 67, Russia, e-mail:
A.P. Ermakov, A.V. Starovoytov, M.L. Vladov
GROUND PENETRATION RADAR SOUNDINGS OF SHALLOW SUBSURFACE FOR DESIGNING WINTER SEISMIC ACQUISITION
Ground penetration radar soundings of shallow subsurface can be applied to winter seismic acquisition in tundra. Specifically, the GPR method is useful for mapping unfrozen water bodies (rivers, lakes, or wamps) which may pose serious danger for heavy trucks and vibroseis sources. GPR cross sections along profiles that traverse streams, lakes, and swamps are presented and interpreted in terms of geology. The reported GPR results were used to distinguish mapping signatures of unfrozen water. We discuss the acquisition technique and instruments and report GPR-derived dielectric permittivity values.
M.V. Lomonosov Moscow State University, Subdepartment of Seismometry and Geoacoustics,
119991, Moscow, GSP-1, Leninskie gory, Russia,
M.S. Khairetdinov, S.A. Avrorov, G.M. Voskoboynikova, G.F. Sedukhina
SEISMOACOUSTIC EFFECTS ESTIMATION OF TECHNOGENIC EXPLOSIONS BY MEANS OF SEISMIC VIBRATORS
The authors propose a new method to estimate dangerous seismoacoustic effects from technogenic explosions (in opencast mines, firing grounds, etc.) taking into account the meteorological and geological conditions. The method uses seismic vibrators and meets the requirements of geological and environmental safety and provides high repeatability of the results.
Institute of Computational Mathematics and Mathematical Geophysics SB RAS, 630090, Novosibirsk, prospect Akademika Lavrentjeva, 6, Russia, e-mail: