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Geomodel 2017
- Conference date: September 11-14, 2017
- Location: Gelendzhik, Russia
- Published: 11 September 2017
121 - 131 of 131 results
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Risk and Performance Analysis for Seismic Vibrators in the Far North Working Conditions
Authors V. Smirnov and E. BondarevSummaryThe article gives the results of qualitative and quantitative assessment of risks arising from the use of seismic vibrator in the Far North conditions. The implemented stochastic Monte-Carlo modeling revealed that risk realization will result in average 20 per cent decrease in the estimated performance. Taking into account the influence of the risks, the potential performance was estimated for three major seismic vibration methods, which are single group of sources, flip-flop and slip-sweep.
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Alternative Ways to Formalize Knowledge for Petrophysical Inversion
By B.N. EnikeevSummaryRobust petrophysical inversion in addition to logging data (matrix Y) requires additional information about the desired physical properties (matrix X) and their interrelationships. This approach allows us to regularize the solution and avoid petrophysical unreality. The author earlier proposed to classify alternatives for specifying such interrelationships of physical properties using cluster analysis and regression. The paper uses a sample of petrophysical data published in open press to compare cluster-type algorithms of mixture type and cluster regression and to recommend improvements.
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The Bazhenov Formation Rocks Wettability by NMR
Authors S. Borisenko, P. Koshkin, S. Rudakovskaya and N. BogdanovichSummaryThe petrophysical characteristics determination of the Bazhenov formation rocks is very difficult. Previously used adsorption method to study the wettability, due to the large organic matter content in the mineral matrix, showed a high degree of hydrophilicity. There is proposed an alternative approach to determining the “wettability index” using the NMR method by direct spectra comparison of rock saturated with water and kerosene. This approach allows successfully solving the organic matter content problem and controlling the results obtained by the adsorption method correctness. As a result, the “wettability index” according to NMR of the Bazhenov formation varies from neutral (in the top and bottom) to hydrophobic wettability (in the middle of the section), which correlates well with the distribution of organic matter.
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Reconstruction of Depositional Environments of Snadd Formation in Norwegian Sector of the Barents Sea
SummaryEOD reconstruction results of Snadd formation are based on well data, core description and photographs, 2D and 3D seismic data (including 3D seismic acquired in 2014).
All in all eight sedimentary sequences of the 3–4 orders have been identified in Snadd formation interval. The sequence boundaries over most of the area coincide with transgressive or maximum flooding surfaces. Seismic facies analysis together with core and logging data analysis permitted to identify typical seismic facies and to make their sedimentary interpretation.
Each sequence has been analyzed to identify stages of maximum development, boundaries of continental deposits distribution, transgressive stages and zonation of accumulations. Also, a propagation of sand bodies of various genesis has been predicted. The most common have been sand bodies of alluvial channel genesis and shelf to nearshore ridges.
As a result of comprehensive studies of seismic and well data of Snadd formation using sequence stratigraphy metodology, regional facies maps have been built. The maps cover the entire Norwegian sector of the Barents Sea, including its eastern part adjacent to the Russian Federation.
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Generation Potential and the Coverage Area of Domanik Formation in the Northern Part of the Timan-Pechora Province Based on Geochemical Studies and Depositional Modelling
Authors O. Bogoyavlenskaya and G. UlyanovSummaryThe purpose of the work is to determine the position of the carbonate zone and the location of the source rocks in the upper Paleozoic section at the transit zone between offshore and onshore parts of the Timan-Pechora oil and gas province. This research is based on the modeling of processes of formation of the domanik-tournaisian carbonate complex. The work was done for the purpose of clarification and verification of paleogeographic models and forecast of oil and gas potential of the study area.
Regarding to the previous paleo-reconstruction study and results of seismic interpretation the reef system may have submeridional and sublatitudinal orientations.
According to results of the modeling the most reasonable system of domanik-syracusecoe barrier reef is sublatitudinal. Which turned out to be the most consistent on most parameters.
The resulting sediment zonation allowed us to localize the zone of distribution of the reefs. In frontreef area within synclines were determined several positive structures with different relief. The arches of these structures might represent different types of single reefs.
The result of this study shows different deposition type in the Pomorskiy val area. The deposits are representing the single reef in backreef zone, but according to the earlier study it was determined as continuation of the barrier reef.
As a result, the paleo-facies map for the frasnian age was corrected and detailed.
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Dilatancy Model of Hydrocarbon Development
Authors D. Degtiarev, I. Nesterov and M. AntipinaSummaryThis article is devoted to such problems as the imperfection of technologies for the development of hydrocarbon deposits, the violation of the injection of optimal fluids into oil deposits, the lack of control over the development of hydrocarbon deposits;
Innovative technologies are made up of the fundamental law of electron-nuclear interaction with a combination of the dilatancy regime in clay-bituminous reservoirs.
The basis of operational drilling is a paradigm - if known oil (gas) entered the rock bed, then it can be raised to the surface with a maximum recovery factor of up to 80% and more, regardless of the capacity factor (porosity) and the permeability of the enclosing rocks. It is not recommended to maintain reservoir pressure with water. An alternative to flooding hydrocarbon deposits is the increase in reservoir pressure due to the creation of a special regime in which free hydrocarbon radicals are formed that can break carbon-carbon bonds to form smaller molecules when their internal (spin) energy interacts with external magnetic fields. With such a development model, the budget costs, compared to the adopted oil deposit development systems, are reduced by several orders of magnitude, and the annual effect is at least 500 billion rubles. The development and implementation of the results of the proposed technologies will make it possible to create in Russia an industry independent of foreign countries in the field of geology, geophysics, development and calculation of hydrocarbon reserves.
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Big Data Technologies in Oil Exploration - Is It the Time to Change Intepretation Paradigm?
By V.V. KolesovSummaryShale oil&gas development, fields development with horizontal wells and complexity of green and brown fields dramatically increase demands for high resolution and accuracy of reservoir characterization. Standard attribute analysis and acoustic inversion technologies in many cases are not able to provide necessary quality of the results.Big Data technologies enable to significantly increase the relability of the predictions and uncertainty evaluation of the reservoir parameters. To get maximal value of the tehnologies it is necessary to refuse from oversimplified interpretation approaches in favor of workflows in which exploration is represented as experiment-like research of reservoir properties with geophysical tools.
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Can the Information on the Shale Reservoirs Mineral Composition be Useful for Petrophysicists?
By B.N. EnikeevSummaryThe report, based on the processing of several data sets on shale reservoirs, provides conclusions on the possibility and specificity of synthesizing multidimensional petrophysical interrelations between the mineral composition of the rock and the quantitative content of organic substance in it. For this purpose, author employs regression and cluster analysis. The limitations, adaptability and accuracy of this approach are discussed in comparison with known pair relationships. The use of such models for clay reservoirs is to increase the accuracy of petrophysical modeling and petrophysical inversion.
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Domanik Formaiton: Exploration Criteria and Program
Authors A. Gabnasyrov, V. Voytko and S. SolovievSummaryThe main purpose of the work is evaluation of the potential of oil source rocks of the Domanik age in the Volga-Ural and Timan-Pechora oil and gas provinces as a unconventional hydrocarbon source on the basis of generalization of the materials of earlier completed and new standard and special core studies. The maps of the content and maturity of organic matter were built, the lithological composition of the Domanik horizon was evaluated, and the comparative evaluation of the domanikite parameters at the commercially developed field-analog Eagle Ford was performed. The work program for additional study of the potentials of Donamik deposits within the work area of LUKOIL PJSC in 2016–2017 was compiled.
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The geological modeling of lower-middle Triassic formation of Toravey field according to the seismic data
Authors E.I. Bronskova and E.L. PotemkinaSummaryThe complex approach is the basis of conceptual model for lower-middle trias sedimets of Toravey field (Timano-Pechora basin). The interpretation of the seismic data with detailed well-log correlation of Triassic interval results in determining of river channels system of different ages. The identified characteristics of the formation structure were implemented in 3D geological model, given a vision of complicated net pay distribution both vertical and lateral that it is essential to drilling plan design
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Influence of Different-Scale Tectonic Dislocations on Transformation of Organic Matter of Coals
Authors S.M. Astakhov, V.N. Melenevsky and A.N. FominSummaryPresent preliminary results of the study show variation of Rock-Eval parameters of coals in different-scale geological folded structures and its dependence from tectonic stress intensivity.
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