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Saint Petersburg 2020
- Conference date: November 16-19, 2020
- Location: Saint Petersburg, Russia
- Published: 16 November 2020
121 - 134 of 134 results
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Rock Typing of Upper Cretaceous Rocks Using Core Analysis Data and Resistivity Logs
Authors N. Kostin and K. DvirnyakSummaryRock typing is one of the most important tasks to be solved during the preparation of petrophysical model. Increasing number of new carbonate reservoirs, as complex and unique sedimentary deposits, requires a concentration of efforts aimed at increasing the efficiency of linking core analysis results and interpretation of well logging. The aim of this work is to combine rock typing methods into integrated system and to obtain input data on its basis for petrophysical modelling. This work involved well logging and core analysis results for 513 core samples. Initial types were selected in accordance with the sedimentary environment and the energy level of hydrodynamic processes. Determined rock type boundaries were linked to the results of mercury injection data (A.J. Katz and A.H. Thompson, 1986; Kamath J., 1992; Abedini A., 2011). Typing process also involved estimation of flow zone indicator (McPhee C. et al, 2015: Tiab D., Donaldson E.C., 2015) and classical approaches for carbonate reservoir characterization (Lucia, F.J., 2007). The results of typing were combined with the resistivity logs.
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Thermochemical Treatment as a Multifunctional Method of Enhanced Oil Recovery
Authors M. Rezaei Koochi, M. Varfolomeev, H.E. Belaid and S. TalipovSummaryIt’s clearly obvious that a technology alone cannot act as a panacea, but thermochemical treatment method can act as a multifunctional technique. This method is based on the decomposition reaction of ammonium nitrate. This work is planned to find study the thermobaric effect of thermochemical fluid, determine its effect on petrophysical parameters of formation and rheological aspects of oil. To measure the released pressure and temperature, 5 ml of the thermochemical fluid was injected into the reaction cell and these parameters were registered in real time regime. It was found that pressure and temperature in reaction zone increase up to 80 atm and 230 ? respectively. Experiments on core plugs show that after thermochemical fluid a network of fractures occurs. Rheological tests show that because of reaction products oil viscosity reduces from from 630 to 55 m.Pa.s.
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Features of Geomechanical Core Studies to Support Hydraulic Fracturing Design
By A. KuznetsovSummaryMethodological recommendations for conducting laboratory studies to determine the elastic-strength properties of core are proposed. The procedure for selecting core samples and performing research to determine parameters for building a rock strength passport is presented. Recommendations are also given for determining elastic modules on standard and full-size core samples under multistage compression, determining rock compressibility, and calculating the Biot stress coefficient
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Determining the Angular Parameters of Reflecting Borders in 3D Seismic Exploration
Authors V. Bondarev, S. Krylatkov, N. Krylatkova and A. KrylevskayaSummaryA method for determining the angular parameters( angles of incidence and azimuths of incidence) of seismic boundaries using standard 3D seismic survey materials is described. This makes it possible to more effectively analyze the history of sedimentation in the studied geological strata. The solution of this problem is carried out for the General calculation points (CMP) selected on the research area. It is assumed that the nature of changes in the depth of the values of the effective propagation velocity of elastic waves is known from the observation profile. Under these conditions, based on the use of a set of source routes of seismograms of common excitation points, you can select special collections of seismic routes that are United by a common reflection point for them at seismic boundaries.
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A Method for Density Models Construction Using Gravity, Seismic Data and Lithostatic Pressure Distribution
Authors P. Martyshko, A. Tsidaev and V. KolmogorovaSummaryA method for construction of density versus velocity dependency formula for the conversion of the seismic cuts into the density ones is presented for the case of block mantle. The method performs minimization of field error by simultaneous change of mantle block density and crustal boundary density values. As an example, the Khanty-Mansiyskiy deep seismic sounding profile is processed and the correlation formula is estimated for rocks density and waves velocity.
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Compensation Methodology of Upper-Layer Anomalies Related to the Surface Relief on the Dynamic Characteristics of Seismic Data
Authors I. Litavrin, D. Danko, A. Svetlichniy, A. Jangirov, A. Shestakov and K. IskazievSummaryIn the abstract the compensation methodology of upper-layer anomalies influence at the stage of seismic data processing are described and tested. Compensation had consisted in removing the low-frequency dependence of seismic AVO attributes and the dominant frequency on changes in surface relief. Application of the proposed methodology has significantly improved the quality of seismic data, increase the reliability of geological targeting and search for the missed perspective objects.
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Controlled Directional Transform of Seismic Attributes for Geological Features Detalization
By E. RozhenkovSummaryVarious geobodies have specific shape on vertical and horizontal projections resulting in geometrically anisotropic features in seismic data. Such features can be enhanced by performing controlled directional transform of seismic attributes based on local linear Radon transform. The approach is to represent results of such transform as polar diagrams, which are then used for anisotropy magnitude estimation as well as number of its prevailing directions and their azimuths. These data are helpful in emphasizing anisotropic features and can even help to distinguish some of them (faults and river channels). Other possible applications of this method include azimuthal filtering and automatic tracking. The proposed approach aids geological interpretation in a variety of ways while being flexible to perform on different structural and dynamic attributes.
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An Integrated Approach to Determining the Boundaries of Complex Objects Based on The Example of Tyumen Deposits
Authors A. Privoznova, D. Mett and O. KimSummaryBased on the integrated approach of combining GIS data and seismic surveys, it is possible to identify smaller boundaries of channel bodies, which contributes to a more detailed specification of the inter-well space of the Tyumen deposits
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Analysis of the Applicability of Local Optimization Methods in Problems of Seismic Amplitude Inversion
Authors D. Bogoedov, I. Erokhin and D. DankoSummaryIn this abstract we discuss the features and possibilities of using various local optimization methods in solving of seismic inversion problems. For this purpose, the model based acoustic seismic inversion algorithm had implemented. Conducted research on the modeled and measured seismic data show the influence of the choice of optimization method on the inversion results. The focus in abstract is paid on the conjugate gradient method and various modifications of the Newton methods.
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Analysis of the Confirmability of Seismogeological Models Within the Perm Territory Based on the Results of Newly Drilled Wells
Authors A. Gorbunov and A. BrazhnikovSummaryБольшая часть территория Пермского края на данный момент является хорошо изученной. В связи с этим, вероятность открытия крупных залежей стремительно сокращается, снижая потенциал прироста сырьевой базы региона. Для решения данной проблемы применяется пространственная сейсморазведка 3D, позволяющая детальнее изучить особенности строения недр и выявить потенциально перспективные объекты для поисков новых залежей нефти и газа. Сейсмические исследования, проводимые по методике МОГТ 3D, являются важным инструментом при поисковых работах, позволяющим как значительно уточнить информацию о выявленных перспективных объектах, так и выявить новые. Однако, несмотря на эффективность данной методики имеют место неточности построений, выявленные последующим бурением новых скважин. В связи с этим, вопрос повышения точности сейсмических прогнозов является актуальным. Сведение к минимуму подобных неточностей позволит снизить риски при размещении скважин и, тем самым, повысит подтвержаемость выявленных структур.
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Expediency Execution Repeated Seismic Surveys 3D on the Oil Fields
By T. SankovaSummaryExpediency execution repeated seismic surveys 3D on the oil fields
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Anomalies of The Thermal Gradient at The Conjugation of The Frolovskaya Megavasin and the Krasnoleninsky-Shaim Structural Zone
Authors K. Musikhin, A. Shuvaev and O. BogdanovSummaryAs a result of the study, a map of reservoir temperatures along the roof of the pre-Jurassic base is detailed.
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Application of Inverse Deconvolution Algorithm. Eastern Siberia Case Study
Authors S. Suslov, N. Zhuravko, E. Uzbekov, R. Filatov, D. Fedorova, A. Mukhatzhanov, A. Zherlygin, A. Sorokin and V. FagerevaSummaryNowadays the algorithm of “robust” surface-consistent deconvolution is widely used. Many seismic data processing companies practice the implementation of fairly aggressive noise attenuation workflows while evaluating trace spectra for subsequent decomposition. However, aggressive noise reduction is often performed in a quick mode without extensive testing and for these reasons is worse than the final version of production noise attenuation workflow. One possible way to solve this problem is to derive and re-calculate deconvolution operators after noise attenuation procedures. The convolution is a linear transformation, which allows us to declare its complete reversibility, and, consequently, the reversibility of the entire procedure of surface-consistent deconvolution. Due to data analysis of a clean dataset without noise interference allowed us to noticeably improve the amplitude-frequency characteristics especially in the low-frequency zone. Another advantage of this approach is the ability to significantly improve the performance of processing large volumes that involve new data acquisition during project fulfillment. In this paper, we consider examples using the reversibility of the deconvolution procedure in a data processing graph.
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Application Capacitive Resistivity Prospecting for Mapping Taliks on the Territory of the Russkoye Oil and Gas Condensate Field
By D. KopylovSummaryThe results obtained by the method of capacitive resistivity prospecting in the area of dangerous engineering and geocryological processes on the territory of oil and gas industry facilities are presented. The presence of a talik under a small watercourse, which completely freezes over in the winter season, has been established. A geoelectric model of the studied talik was obtained. Technogenic warming effect on the soils of the floodplain part of the watercourse was revealed.
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