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Progress’19
- Conference date: November 5-8, 2019
- Location: Sochi, Russia
- Published: 05 November 2019
41 - 60 of 86 results
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Ultra High Trace Density Seismic Acquisition for Petroleum Exploration in Artic Regions
Authors P.A. Munoz, J. Uribe, N. Sanabria and G. OcampoSummarySeismic acquisition for Petroleum Exploration in Artic regions is usually restricted to the winter season. Conventional seismic methods require that the survey area and acquisition parameters are constrained to match the narrow time frame. The quality of seismic image and reliability of predicted amplitude anomalies of shallow targets is restricted by the smaller trace contribution at shorter times in the seismic gathers. Exploration of shallow targets requires very densely sampled surveys by reducing line spacings and point intervals. Our recent experience in Kuukpik 3D Alaska (USA) demonstrates that ultra-high source density supported by unconstrained simultaneous sources overcomes the limitations of conventional seismic acquisition in Artic regions.
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Thin Section Photos Processing with Neural Networks
Authors S. Polushkin, Y. Volokitin, I. Edelman, E. Sadikhov, Y. Murzaev, O. Lokhanova and S. BudennyySummaryNeural network designed for cardiovascular diagnostics was trained to identify grains on thin section photos. About 150 thin section photos were processed. The result contains grains size and shape, mineralogical composition and pores size. This information is critical at all stages of field development from rock properties and petrophysical modelling to proper selection of drilling mud and well kill fluids.
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Value of Information Assessment Methods Evolution as a Response to Technological and Organizational Challenges
Authors V. Demo, R. Kim, A. Sizykh, E. Bogdanovich and G. GrigorevSummaryThe definition of value of information has been used since 60th. By this time there has been developed some new methods, that influenced on the way of uncertainty reduction. The main idea has not changed. Value of information is a difference between expected monetary value with and without information. Challenges in exploration, that took place last decades, make an important part in methods development. For example, it is new approaches in uncertainties evaluation by application of technologies improvement.
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Technological Limit of Exploration Well as a Tool to Improve the Efficiency of Exploration Processes
By O. KalininSummaryThe introduction of the principle of technological limit in the construction process of an exploration well reduces the duration to 60% and the cost to 20% through the introduction of technological, organizational and digital initiatives.
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Unmanned Vehicles in the Exploration Proccess
Authors G. Grigorev, I. Karpov and N. SivoySummaryToday, breakthrough solutions are formed at the intersection of two or more scientific and/or engineering areas, this project is a good confirmation of this. Today, the integration of unmanned aerial vehicle technologies with the methods of area geophysical surveys is a breakthrough solution aimed at the development of a functional family of non-seismic search methods. The tests made it possible to confirm a set of hypotheses, to clarify a set of methodological subtleties and to form a further vector of development of the project
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Advantages of the Use of Drones in a Complex Onshore Seismic Project in Greece
Authors A. Islamov, I. Garcia, G. Ocampo and D. LaraSummaryThe use of drones in a challenging onshore 2D seismic campaign in Greece has been proved to be a valuable tool to solve multiple problems both during the planning and execution stages of the project. The applicability of drones include the aerial inspection with generation of digital elevation models, detection of obstacles in the field even before commencement of operations, seismic planning in UXO (Unexploded Ordnance) sensitive areas that requires special attention, the search of access roads for efficient logistics, the receiver points and shot holes planning and the calculation of compensation to landowners and estimation of reforestation, among others.
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Development and Implementation of New Exploration Tehnologies of PJSC «Gazprom Neft»
Authors A. Vashkevich and A. BochkovSummaryOne of the most important parts of a successful O&G exploration process is the application of new and improvement of existing technologies aimed at fast, high-quality and cost-effective obtaining of geological and geophysical information. In this regard, Gazprom Neft updated the exploration technological strategy until 2022. Work in accordance with strategy and focus on the development of technologies in O&G exploration has made it possible in recent years to achieve significant success in Company’s exploration effectiveness.
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Innovations and Technologies - the Drivers for Economical Efficiency of Exploration
By D. BolotnikSummaryOil companies do invest into exploration not to discover new fields as such but to find economically efficient resources which would extend profitable life of existing or even create new profitable production units. In this context exploration becomes part of investment process where value from potential development project stands behind seismic and drilling costs. The talk discusses some of the technological developments which can boost efficiency of Exploration in this context by:• Helping companies to concentrate on most valuable projects using multi realization modeling and decision trees.• Getting more information from exploration and appraisal wells due to integration of all available data and use of advanced interpretation technologies. •
Reducing time and cost of operations • Transferring information from exploration/appraisal stages to the development stage in aim to
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Data Driven Exploration Planning as Multi-Objective Problem Solving Based on Geological and Geophysical Information
Authors P. Mostovoy, V. Fagereva, N. Taratin and I. SafarovSummaryIn the article the process of integration all the available geological and geophysical data in a decision making of exploration and assessment well drilling is considered as a multi-objective problem solving.
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Cognitive Technologies for Geology Exploration
Authors Z. Filippova, A. Bochkov and R. Abreu de PaulaSummaryAnalysis and interpretation of geological data for decision making at the exploration stage is one of the most difficult and important tasks for the O&G industry. At this stage, experts aim at maximizing the understanding of the value of an asset, while dealing with high levels of uncertainty. IT solutions based on classical mathematical algorithms are not able to support such complex operations, for they require well-defined and structured data-process models. The new generation of technological systems capable of continuous analysis and cognition of the surrounding world are better fit to cope with such tasks. A Joint research project between Gazprom-Neft and IBM Research has shown evidence that cognitive technologies have the potential for application in geology exploration. The global goal is to support all professionals involved in the process of geological data analysis so that they can make more efficient and informed decisions by automating the routine tasks and reducing the number of unnecessary cycles, iterations. The results at the current stage corroborate the value of introducing cognitive technologies not only for solving linear problems of processing and interpreting geological data, but they will form the basis for the transformation of standard approaches throughout the geological exploration cycle.
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Investigation of the Hard-to-Recover Green Field as a Key to Development Optimization
Authors Y. Golovatskiy, I. Ishimov, T. Kryuchkova, D. Sleptsov, N. Parshin and N. MezhnovaSummaryA case study of investigation of the hard-to-recover tight green field in West Siberia is presented in the paper. The objective of the test was direct measurement of stresses in the target oil-bearing formation as well as in layers above and below, subsequently, obtained data were used to revise the model of hydraulic fracturing for multi-stage horizontal fracturing applications. The motivation to check the model was driven by high water cuts in new horizontal wells drilled at a lower depth. According to the revised geomechanical model, the stress profile in the field is not common for West Siberia, having very low stress contrast between the producing layer and shale layers above. Fractures exhibited excess height growth that could not be identified by common methods of analysis. Therefore, a primary source of water production was identified to be the layer above the producing formation (50–70 m above). The pilot horizontal wells with multi-stage fracturing according to the revised fracture technology application were positive: water cut remained below 15%. This results helps to optimize the development strategy of the field and to improve economic viability.
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Complex Risking
By O. KlarnerSummaryComplex risking can be conducted on project and on company level. On project level, the risk matrix, containing classifying parameters like NPV, IRR, exportability, specific costs, geological risks, and hydrocarbon volumes, combines different aspects of a project. Each parameter is being quantified and the assessment of the overall strategic and/or financial value of this project can be determined and compared with others. On company level, a similar matrix can be applied, but several projects are being valued in line with company related factors like deal structure, operatorship, commercial and political competitiveness. Materiality, values and risks of each project also play their role. On this level, the assessment of the overall strategic fit of a project is being looked at more from a management point of view, rather than from a technical one. As a result, strengths and weaknesses of each assessed project are clearly demonstrated, which provides a solid basis for decision making and budget allocation.
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Matrix of Individual Approach to the Geological and Technical Exploration while Wildcats Drilling
Authors A. Kushnikov, M. Podberezhnyy and I. SafarovSummaryThe approach (Mudlogging / LWD matrix) is proposed, that allows you to select an effective complex of services to solve a specific exploration drilling problem taking into account the geological features, the geomechanical properties of rocks, the types of drilling fluids and the technological aspects of well construction
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Express Analysis of Oil and Gas Assets
By O. KlarnerSummaryInvestors often must make fast decisions on investments. There is no time and money for comprehensive in-depth studies of an oil or gas field. We present an approach of evaluating assets from geology to economics within 4 to 6 weeks which enables quick decision making. It also provides a competitive advantage in a challenging environment. We will demonstrate our workflow and elaborate on the respective stages in order to accomplish such a complex task. The validation of presented reserves of a field is in important item, but aspects like license status, ownership, history of the block are not less of importance. The analysis of non-technical parameters contributes to a holistic reflection of the asset and puts the investor into a comfortable position by understanding the complete value chain. The workflow can be applied for exploration and production assets regardless of their geography or deal structure.
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The Influence of the Geophysical Methods and Well-Logs Ambiguity on the Geological Model of Oil and Gas Uncertainty
Authors I. Buddo, I. Shelokhov, A. Smirnov, V. Emelyanov, N. Misyurkeeva and I.Gorlov GorlovSummaryEstimation of the structural model uncertainty, capacitive parameters and the position of fluid contact of oil and gas fields at the reconnaissance and exploration stage is one of the priority problems. The problem is especially acute in the block structure of the field, as well as in the absence or lack of drilling materials and well-logs. In this instance, the joint interpretation of the ground geophysical studies - seismic and electrical exploration -allows to predict the position of fluid contact, minimize the “white spots” of capacitive characteristics and optimize exploration and well drilling. At the same time, each data set contains errors; therefore, it is extremely important to estimate uncertainties and possible errors of geological models. The task of the study is a probabilistic assessment of reserves of the target reservoir horizon of one of the Eastern Siberia fields based on the results of stochastic modeling, taking into account the uncertainties of the key elements of the model.
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Modern Approaches to Geological and Geophysical Data Integration to Optimize Expenses at the Exploration and Development Stages of Hydrocarbon Fields
Authors A. Smirnov, I. Buddo, I. Shelokhov, Y. Agafonov, A. Vakhromeev, N. Misyurkeeva and I. GorlovSummaryAt the exploration stage of oil and gas fields it is extremely important to correctly choose the geological and geophysical materials integration approach. Each data set contains errors; therefore, it is necessary to estimate uncertainties and possible errors of geological models. The use of an effective geological exploration complex -seismic and 3D electromagnetic prospecting, shallow electromagnetic prospecting sTEM - allows to create the most reliable and consistent model of the section in the depth range from the first meters to the basement surface. The use of an optimal set of exploration methods allows reducing costs at the stages of exploration and development of hydrocarbon deposits by minimizing the percentage of dry drilling, solving water supply issues (reservoir pressure maintenance systems), etc.
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Successful Applications of Joint Seismic and EM Exploration in Eastern and Western Siberia
Authors O. Tokareva, Y. Agafonov, I. Buddo and A. IlyinSummaryPresently there is a rich experience in the 3D seismic and EM exploration application in geological settings of Eastern and Western Siberia. The problems of the upper part of the section structure mapping, the aquifers investigation, the capacitive properties and the type of saturation of productive layers prediction are solved. Additionally, the technology of electromagnetic exploration has been tested and introduced into production for the geological settings of drilling prediction and water front movement appraisal. Examples of geological problems solving with the TEM electromagnetic soundings application are given. Depending on the studied depth intervals, the solved geological problems are divided into 3 groups – the upper part to 500 m, the middle part of the section 500–2000 m, the depth interval to which the main productive horizons are confined – 2000–4000 m.
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Regional Model as an Instrument for Exploration and Analysis of Prospective HC Traps in West Siberian Achimov Formation
Authors N. Parfenov, A.A. Timirgalin, M.G. Butorina, N.O. Novikov, G.V. Volkov and I.R. MukmimovSummaryVarious data of different scales were combined in regional model of Achimov formation to mark prospective options for business. Integrated model included quality and quantity of hydrocarbon resources, exploration degree and risks (geological, technological and economic). The result is a business tool for prospective regions search and appraisal to recover and increase company resources.
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Benefits of Drilling Horizontal Exploration Wells for Regions with a Complex Geological Structure
Authors V. Bakhurskiy and V. VorobyevSummaryThe report discusses the benefits of drilling horizontal wells in order to relieve geological uncertainties during oil and gas exploration. The application of the approach significantly increases the informativity in the drilling area, allows you to assess the main geological parameters of the reservoir and their variability in the section, reduce uncertainties on the productivity of horizontal wells, which are increasingly chosen by oil and gas companies for hydrocarbon production, as well as reduce the time between the exploration and production at capital costs commensurate with classical exploration wells.
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Geomechanics is Tool Used to Increase Efficiency of Extended-Reach Drilling
Authors R. Mukhamadiev, S. Gabitov and D. AlchibaevSummaryToday Extended-Reach Drilling (ERD) wells are widely used because of complex geology. Troubles in ERD can cause big expenses and affect whole project economy. That is why it is crucial to predict and prevent troubles in drilling. Real cases show how cross-functional interaction and geomechanical modeling contribute reduction of non-productive time. Today geomechanical modeling is used as a tool to collect and conform broad spectrum of data. Getting geomechanical modeling in perspective will increase drilling efficiency further.
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