SCATTERED WAVES ALLOCATION AND ANALYSIS BY THE TRANSMITTING AND RECEIVING FOCUSING METHOD FROM THE SEISMIC CDP DATA

(Smirnov A.S. Ryabkov V.V. )

In seismic exploration, for the fault or fractured zones in a carbonate section studies, scattered waves are successfully applied to obtain information additional to the results of the conventional reflected waves interpretation. Recent years It was shown, the application of scattered waves jointly with reflected waves analysis can also be useful in hydrocarbon exploration in the settings of a “formable” section of Western Siberia.......

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  • 2020  № 4, pp. 80-88

MULTI-AZIMUTH APPROACH OF DEPTH IMAGING FOR MARINE TOWED STREAMER DATA

(Esinov B.S. Litvyakova O.O. Sakharov A.B. Rossiyskaya E.M. Korolev A.E. )

In practice, imaging and processing solutions to poor seismic illumination of narrow azimuth towed streamer marine data is limited due to acquisition design. We show here several examples of marine data from different fields located on Norwegian Continental Shelf where the multi-azimuth approach of the velocity model building and imaging has helped to improve the quality of seismic image and as a result to perform a more reliable interpretation. The workflow included advanced multi-azimuth depth processing as well as multi-azimuth velocity model building and imaging.......

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  • 2020  № 4, pp. 89-97

ONE PRACTICAL CONSEQUENCE FROM THEOREMS OF UNIQUENESS AND EQUIVALENCE OF INVERSE GRAVITY PROBLEM

(Petrishchevsky A.M. )

Theoretical basics and practical examples of realization of the probabilistic-determined approach to interpreting of gravity anomalies using a sweeping out of volume sources on a surface of equivalent spheres are reviewed. Unlike the finite element approach, objects of interpretation are the spheres equivalent to complicated systems of density inhomogeneities. 3D-distributions of equivalent spheres contain information on a deep structure and a rheology of the crust and upper mantle.......

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  • 2020  № 4, pp. 98-111

INTERPRETATION TECHNIQUE BASED ON X-RAY TOMOGRAPHY OF CORE AND LOGGING OF DEVELOPMENT AREAS OF BITUMEN-CONTAINING AND OIL-CONTAINING RESERVOIRS WITH DETERMINATIONOF THE TYPE OF THEIR WETTABILITY

(Shumilov A.V. Galkin S.V. Lekomtsev A.V. Kolychev I.Y. Potekhin D.V. Cairui Shao )

According to the data of sandstone core research, bituminous sandness has also been established in the Perm Region. Using the method of X-ray tomography, the authors evaluated the wettability of oil-saturated cores at various rock electrical resistivity ranges.It has been established that rocks are predominantly hydrophobic with resistivity more than 200 Ω·m, while, rocks practically do notfilter water with resistivity greater than 600 Ω·m. Authors developed an informative logging complex that ensured the allocation ofdifferent types of reservoir areas: hydrophilic oil-saturated, hydrophobic oil-saturated, hydrophobic bituminous (“black sandstones”)for the solving problems of efficient development of such deposits. The results were used to construct a digital geological model of the Bobrikovian horizon of the Siberian field. In this model were identified areas with a predominantly hydrophilic and hydrophobic type of reservoir in the volume of oil-saturated reservoirs.......

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  • 2020  № 4, pp. 112-121

UPSCALING LITHOTYPES FOR INTEGRATED INTERPRETATION OF WELL LOGGING AND SEISMIC DATA

(Epov K.A. )

An approach to upscaling petrophysical lithotypes is proposed. This procedure results in a new system of effective rock types which characterize lithological diversity of deposits in the seismic frequency bandwidth. These upscaled lithotypes are corresponded„fectiveto some classes of stochastic ensembles composed of log-scale “elementary is defined based on classification error probability. Parameters of “ef „lithotypes. Similarity measure between any two classespetrophysical properties probability distributions for theupscaled lithotypes can be estimated using stochastic petrophysical modeling technique. The obtained system can be naturally linked to the results of geological interpretation of core and well logging data. Theoretical background of the suggested method is considered in the first part. The second part presents two case studies based on synthetic and real data.......

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  • 2020  № 2, pp. 2-21
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