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Seismic Survey Technologies
Guidelines for Authors
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V.P. Ivanchenkov, A.I. Kochegurov, N.A. Kupina, O.V. Orlov
Phase/frequency picking of reflection events: method and application to CMP data processing
A new method and algorithms for picking reflection events according to their phases and frequencies have been designed and applied to processing synthetic and field CMP gathers. The phase/frequency picking algorithms show high resolution and noise immunity, which is evident in object-oriented time sections along several profiles of the Krapivinskoye oilfield in the Tomsk region. Unlike the conventional processing results, the phase/frequency-based sections of thin-layered reservoirs can resolve weak reflectors and minor faults.
National Research Tomsk Polytechnic University, Department of Applied Mathematics, Lenina Avenue, 30, 634050, Tomsk, Russia, e-mail:
Reverse-time migration with correct extrapolation of pressure and shear waves in borehole seismic
Reverse-time migration (RTM) is a well-proven method for surface seismic prospecting. However in borehole seismic (Vertical seismic profiling, VSP) direct usage of surface RTM method generates nonexistent interfaces (artifacts) due to ambiguity of primary/shear wave definition. These artifacts are often stable and cannot be wiped out after summation over all shots and often complicate the interpretation.
This paper proposes a modified RTM algorithm that uses a different functional treating pressure and shear waves separately. Application of the new RTM method helps eliminate the ambiguity artifacts.
Moscow Institute of Physics and Technology, Department of Computational Mathematics, 141701, Moscow region, Dolgoprudny, Institutskiy per., 9, Russia;
Schlumberger Moscow Research, 119285, Moscow, Pudovkina str., 13, Russia; e-mail:
L.D. Gick, V.A. Kontorovich, M.S. Kanakov, V.V. Lapkovsky, B.V. Lunev, M.M. Nemirovich-Danchenko
Spectral analysis of seismic data: implications for detecting highly porous reservoirs
The study aims at testing the use of variations in seismic spectra as guides for detecting lossy zones in time sections processed with conventional techniques. High attenuation of seismic energy in thus detected zones may result from high volume contents of voids (both primary and secondary porosity). Depending on specific geological settings, they may be interpreted as zones of oil and gas accumulation or migration.
Trofimuk Institute of Petroleum Geology and Geophysics, SB RAS, Acad. Koptuga prosp., 3, Novosibirsk, 630090, Russia, e-mail:
Features of seismic inversion for reservoirs in the Siberian Craton: a case study of the upper chona field
The conventional acoustic inversion of seismic data from the Siberian Craton fails to provide reliable reservoir evaluation. Several modifications have been applied to adapt the modelling to acoustically-contrasting thin-layered reservoirs. The background acoustic impedance model generated with the new approach provides information on the number and locations of reflectors. Three kinds of background AI models have been tested: a model with a higher frequency, a cell model, and one obtained by iteration. The cell model has shown the best results and improves significantly the inversion quality. Specifically, it has made possible for the first time to evaluate the reservoir storage capacity (dot product of porosity and net thickness).
LLC Tyumen Petroleum Research Center, 625048, Tyumen, Osipenko st., 79/1, Russia, e-mail:
P. Kulyapin, T.F. Sokolova
Statistical well log analysis of the bazhenov formation
The statistical log analysis has been applied to study the multimineral composition and porosity of the Bazhenov unconventional play. Effective and secondary porosities, as well as net thicknesses, were evaluated using the well-log interpretation workflow designed at the Well Logging Department of Gubkin Russian State University of Oil and Gas. The advantages, limitations and drawbacks of the suggested approach are discussed and illustrated with case studies for several fields located in the Krasnoleninsky and Surgut arches of the West Siberian basin.
Secondary porosity (fractured/vuggy zones) has been analysed from shear wave splitting effects. Additionally, the mechanical and elastic properties of the Bazhenov shale have been analysed using well logs, in order to identify the most brittle rocks in the formation, considered as the most favourable for fracking and completion.
Jason, a CGG Company, 127015, Москва, ул. Вятская, 35, стр. 4, Бизнес-центр “Вятка”, Россия, e-mail:
S.V. Yaskevich, A.A. Duchkov
Comparison of accuracy of microseismic event location using surface and downhole acquisition systems
In the last decade microseismic monitoring of hydraulic fracturing has become a popular technology in the oil and gas industry. It is actively used for estimating geometric parameters of hydraulic fracture. For microseismic monitoring one can use surface or downhole seismic arrays. The former needs a number of geophones deployed at the earth surface above the place of hydraulic fracturing, the latter needs one or several downhole geophone arrays placed close to the area of interest. In this paper we compare accuracy of event location for both downhole and surface monitoring systems. It is shown that vertical coordinates of the event hypocenters (correct depth of the horizon being treated) can be properly estimated using downhole arrays. Surface monitoring array provides reliable estimates of horizontal positions of microseismic events.
Institute of Petroleum Geology and Geophysics SB RAS,
630090, Novosibirsk, Pr. Ac. Koptyuga, 3, e-mail:
Yu.I. Kolesnikov*, K.V. Fedin*, A.F. Emanov*,**
Studying surface sediment resonance using microtremor: physical modelling results
The possibility of studying surface resonance properties from asynchronous microtremor records is investigated
with 3D physical modelling. Shallow sediments are simulated in the physical models by a top layer in two- and three-layer media, by a layer lying upon two adjacent vertical blocks of different compositions, as well as a wedge and a lens upon two horizontal layers. Microtremor (acoustic noise) is recorded on the model surface by a moveable transducer successively at different points relative to a fixed reference transducer; the obtained series of data are then converted to a unique time corresponding to the synchronous records of the reference transducer. Isolating the standing waves from the converted records can reduce the distorting effect of non-stationary noise on seismic microzonation data. The physical modelling results agree with finiteelement simulation.
*Trofimuk Institute of Petroleum Geology and Geophysics, SB RAS, Acad. Koptyuga prosp., 3, Novosibirsk, 630090, Russia, e-mail:
**Altay-Sayan Branch of Geophysical Survey, SB RAS,
Acad. Koptyuga prosp., 3, Novosibirsk, 630090, Russia, e-mail:
A.V. Belyashov*, V.D. Suvorov**, E.A. Melnik**
Seismic study of Semipalatinsk test site area near-surface section
The paper presents the results of data processing from seismic observations conducted along 3 parallel profiles (length – 6 km; spacing – 500 m) in the area with underground nuclear explosion boreholes of the Semipalatinsk Test Site. The traveltime curves length was 0.125–6 km with the shot-point intervals of 500 m and the distance between the receivers of 125 m. First-arrival curves indicated a low-velocity (up to 1000–1500 m/s) in the near-surface layer. Beneath this layer the velocity changes in the range of 3600–5500 m/s. We used seismic tomography and forward ray tracing methods to reconstruct velocity models. These two methods showed considerable distinctions in 2D velocity models. The tomography results have turned out to depend on the starting model which is very difficult to find. Results of using forward ray tracing are closer to geological and borehole data. They showed reduced velocity to the depth of 200 m in the vicinity of explosion boreholes*.
*Institute of Geophysical Research, Committee of Atomic Energy, Kurchatov, Kazakhstan, e-mail:
**Institute of Petroleum-and-Gas Geology and Geophysics, SB RAS, Novosibirsk, Russia, e-mail:
V.V. Masjukov, M.A. Popov, S.P. Tunegin
Industrial applications of attribute prediction need improvements
The paper presents a brief review of state-of-the-art attribute prediction technologies including their theoretical and practical aspects. New, more convenient estimations of reliability, accuracy and informativity of geological attribute predictions have been suggested. Utility of “effective correlation coefficient” for scattered data has been shown. In the article one also discusses and compares neutral networks and regression predictions.
Slavneft R& D Department, 170002, Tver, Chaykovskovo 21A, Russia,