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Seismic Survey Technologies
Guidelines for Authors
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V.L. Trofimov, V.A. Milashin, F.F. Khaziev, G.A. Mal’tsev
Improving efficiency of seismic in case of complex geology-tectonics conditions by method of a high-resolution seismic
Acuteness of enhancing seismic exploration efficiency has been analyzed in detecting hydrocarbon accumulations in productive and prospective zones characterized by developed upthrow-thrust tectonogenesis with concurrent folded dislocations and with manifestation of thrusts from the direction of sea and with the presence of reservoir rocks that are severely fractured and show globular-laminar microstructure and pronounced spatial nature of recorded wavefield. These were the environments where rock composition was predicted for complex-geology hydrocarbon-prospective subsurface features from high-resolution seismic and well-logging data acquired in both onshore and offshore areas.
OOO “MEGATSENTR PLYUS”, MOSCOW
V.A. Milashin, V.L. Trofimov, F.F. Khaziev
Forecasting opportunity for a oil-bearing deposits consistence and properties by seismic profiles using the technology ‘VRS-Geo’
The HRS-Geo high-resolution seismic technology was applied to seismic data acquired in one of the Middle East regions with complex seismic and geologic conditions. The target zones in the study section in that region is lithologically very heterogeneous, and low-porosity reservoirs are present. Geologic indicators such as lithologic composition, reservoir properties and oil and gas saturation, so important in prospecting and exporation, were predicted for the Unayzah horizon from high resolution seismic data, acquired on two crossing lines, and from well logging data.
OOO “MEGATSENTR PLYUS”, MOSCOW
F.F. Khaziev, V.L. Trofimov, V.A. Milashin
Defining geology-geophysical parameters of real media by high-resolution seismic
The paper considers how the algorithm of predicting composition and properties of zones prospective for oil and gas presence can be applied to high-resolution seismic data- 2D sections and 3D data cubes of effective reflection coefficients and effective acoustic impdances- in the HRS-Geo high-resolution seismic system. The authors of the paper have developed special petrophysical equations for use in determining lithologic composition, and character of fluid saturation in reservoirs. A number of instances are presented showing conversion of high resolution seismic data to geologic indicators.
OOO “MEGATSENTR PLYUS”, MOSCOW
Experience of practical application of modern technologies of complex analysis of different wave types in Russia
Reasons for significant reduction of publications quantity concerning results of the method of multiwave seismic prospecting in Russia are considered and analysed. By example of published data under the various projects which have been carried out recently with use of modern three-component geophones VectorSeis (ION Inc.), the major factors bringing to low quality of geological results of multiwave seismic, and possible way out are shown.
VNIIGEOPHYSICS – ION, MOSCOW
A.Yu. Barkov*, Ya.I. Shtein*, I.V. Yakovlev*, T.A. Grechishnikova**
Reprocessing of 3D seismic data for interpretation reliability improving and geology structure features detection
A constant growth in computational power of hardware equipment and increasing capabilities of seismic processing software allow to assume the efficiency of periodic reprocessing of existing seismic data. As a result of reprocessing and re-interpretation significant geological features of the studied prospects and hydrocarbon fields can be discovered. This is specifically important when dealing with offshore objects in the Arctic because in this region geophysical exploration and drilling activities are quite expensive and very limited in time due to the short ice free field season. In the current paper we present a successful case study of reprocessing 3D seismic data, and also discuss a set of criteria applied to quality control and assessment of alternative reprocessing results.
*OOO VNIIGAZ, MOSCOW, **WESTERNGECO, MOSCOW
N.E. Sokolova, A.S. Schareva
Accounting for permafrost while detailed seismic modeling of petroleum deposits with complex structure
V.M. Stupak, N.V. Leschenko
Results of complex interpretation materials of MOGT and MOVZ on South-East Fennoskandia
The article considers the first experiment of joint interpretation of materials for two seismic studies for the profile New Ladoga – Oshta crossing junction of Baltic shield and Russian plate: reflection survey using common-midpoint method and refraction earthquake wave method. Two data sets complement each other in terms of their resolution allowing construction of seismic section for the whole depth range – from the earth surface down to upper mantle. Joint interpretation of seismic and other geology-geophysical data allows detecting how far crustal and mantle faults penetrate into upper crust. This information is important for mineralogical prospecting of the territory. These results can be considered as a starting point for geophysical prospecting.
FGU GNPP "SPETSGEOFIZIKA" SAINT-PETERSBURG
A.S. Belyakov, V.S. Lavrov, A.V. Nikolaev
On waveforms of microseismic noise
The analysis of waveforms of mircoseismic noise in the Earth crust, its origin and variability serves as an instrument for the solution of a series of scientific and applied problems. For example, the problem of obtaining additional arguments for the answer to the controversial question on the direction of the mantle material and consequently to the question whether the radius of the Earth is constant or increasing. Efficient earthquake prediction in a specific area is an example of applied problems. The correlation of electromagnetic emission with the change of the strained condition of the Earth crust is also being treated.
Schmidt Institute of Physics of the Earth RAS, Moscow
A.S. Belyakov*, D.M. Guberman**, A.D. Zhigalin***, V.S. Lavrov*, A.A. Lyubushin*, V.A. Mukhamedov*, A.V. Nilolaev*, A.V. Sevalnev***, Yu.N. Yakovlev**
New results of acoustic noise monitoring in the Kola superdeep borehole
Certain weak high frequency noises and their variations were registered during geo-acoustic monitoring in the Kola superdeep borehole on the depth of 3050 m. The anthropogenic impact on the microseismic background (frequency band 0.3-10 Hz) was recorded. After processing of the data using the original technique five seismic events significantly remote from the observing point were distinguished.
*Schmidt Institute of Physics of the Earth RAS, Moscow
**Federal State Unitary Affiliated Enterprise, Scientific Industrial Centre, “Kola Superdeep Borehole”, Zapolyarny settlement
***Sergeev Institute of Environmental Geoscience RAS, Moscow
N.A. Karaev, Yu.P. Lukashin, O.M. Prokator, V.P. Semenov
Physics modeling of a fractured media
Original designs of physical models have been suggested and realized allowing modeling of vertical fracturing with given geometrical parameters of fractures. It was found that the geometry of fractures influences considerably a field of scattered waves even when their effective size is much less than the wavelength.
FNG UNPP “GEOLOGORAZVEDKA”, SAINT-PETERSBURG
S.V. Ivkin, V.A. Pozdnyakov
Joint engineering-geophysical studies for near surface characterization
Structural characteristics of the upper part of the geological cross-section often cause difficulties in the technology of mining operations, building and exploitation of engineering constructions. Subsurface georadar detection is the most efficient and cost-effective way to detect structural characteristics of geological environment up to 15 - 25 m deep. Complexation of georadar and middle-frequency electromagnetic surveys at 50 - 100 m depth provides sufficient basis for construction. Complex georadar and middle-frequency electromagnetic surveying detection and localization of faults and other structural elements in the upper part of the geological section were conducted. The results of the survey on the Angara River were given.
S.A. Zhgenti, B.V. Zaporozhets
Technology and experience of application of XZone® Marsh Line system for 2D- and 3D-seismic studies at a limit of shallow-water transit zones
The article deals with the description of key points of 2D- and 3D-technology developed to be applied for extremely shallow transition zones. It describes CDP surveying with OBC. The article features a new specialized vehicle for moving seismic equipment in extremely shallow TZ - TARTUGA. The vehicle is driven by side padle wheels. The article presents seismic sections showing high quality of the recorded data.
SI TECHNOLOGY COMPANY, GELENDZHIK
G.I. Petrashen’, A.G. Rudakov
On inadmissibility of distorting natural laws in fundamental problems of technological seismic exploration
Yu. P. Ampilov
Theory and practice are not always ‘friends’ in seismic exploration
Where are the diffractors?
The short note is a comment on the paper by G.I. Petrashen and A.G. Rudakov published in the present issue of the journal. It is shown that the development of the many approaches to seismic data processing and interpretation is based on the concept of a point diffractor, and this concept is a mathematical abstraction which does not correspond to the real geological objects. Huygens ‘ Principle, which is often referred to in the analysis of algorithms, in its classical form is dynamically inaccurate. In the problem considered one should use extended reflectors as an approximation of the Earth, rather than a set of point diffracting objects.
OOO "GEOTECHSYSTEM", MOSCOW