Applied Geology of Oil and Gas

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Authors: Vadim Aleksandrov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Evgeniya Neelova
Abstract: One of the main problems with the bottomhole formation zone processing is the choice of an acid composition adapted to the peculiarities of the geological structure of the facility. The highest technological effect of the geological and technical interventions using physicochemical formation stimulation techniques is achieved when the genesis of processed deposits is taken into account during the process of treatment planning. The research objective is to assess the impact of the reservoir units formation (genesis) characteristics on the effectiveness of integrated processing of the bottomhole formation zone of injection wells with the application of acid compositions. Using the geological and routine analysis of the development process parameters for deposits located in various facies zones, the operational benefits of the bottomhole formation zone integrated treatments in injection wells were evaluated and practical recommendations were provided.
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Authors: Vadim Aleksandrov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Vladimir Zapevalov
Abstract: The research objective is to determine the genesis of productive sediments in the AS8, BS1, and YUS2 reservoirs and reveal the peculiarities of their forming. The identification of facies complexes in productive sediments was carried out with the help of facial and electrometric methods of investigation.
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Authors: Vadim Aleksandrov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Evgeniya Neelova
Abstract: Borehole seismology allows studying the specific features of the geological structure and physical properties of deposits in the borehole environment using waves of various kinds based on the analysis of characteristics of these waves, their rates propagation, attenuation, space polarization, and the nature of rock anisotropy. The research is intended to study the wave fields of various types of waves taking into account their dynamic, speed and polarization characteristics and the features of geological structure both in the vicinity to the borehole and laterally in the crosshole space. Using the borehole seismology method, the geological structure of reservoirs was specified; a prediction was given as to the development of enhanced reservoir units in the crosshole space.
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Authors: Vadim Aleksandrov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Evgeniya Neelova
Abstract: Oil recovery factor (ORF) assessment for sites of the Sredne-Ugutskoye field was performed applying various methods. For this field, the ORF prognostic assessment applying the existing methodological approaches is very relevant, as well as the selection of the most appropriate and accurate ORF calculation methods, taking into account the specific features of the geological structure of formations and reservoirs. The research objective is to obtain an adequate assessment of the ORF for productive sites of the Sredne-Ugutskoye field. With the help of a whole group of methods (analogy, empirical-analytical and empirical-statistical methods), predictive calculations of the ORF value for a number of Jurassic-age development sites were performed.
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Authors: Vadim Aleksandrov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Mikhail Zavatskij
Abstract: One of the acutest problems in the oil and gas industry is the efficient development of low-permeability reservoirs in Jurassic sediments. At that, the choice of efficient technologies can be made basing on the analysis of field-geological and laboratory data, as well as the analysis of previously conducted activities with account of facies genesis of reservoir rocks in the wells, where the geotechnical activities (GTA) are realized. The research objective is the assessment of bottomhole formation zone (BFZ) results for the YUS11 development wells at the Fainsk oil field with the application of hydrocarbon solvents and acid compounds. Using detailed field-geological analysis, the data obtained after the processing of a bottomhole formation area of the development wells with the application of hydrocarbon solvents and acid compounds was assessed.
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Authors: Vadim Aleksandrov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Mikhail Zavatskij
Abstract: The Ozernoye field is a unique geological object. The primary geological and geophysical materials obtained during its inspection allow coming close to developing universal methods for carbon-containing field logging, which can be extended to other geological objects. The research objective is to forecast the development of reservoir units in undeveloped parts, determine the expected parameters of their class, the maximum total net reservoirs and the number of sandy formations, carry out their indexation and detailed paleogeographic reconstructions of the inspected area. Using the paleogeographic methods, retrospective reconstructions of sedimentation accumulations were performed. The facies analysis of sediments made it possible to elucidate the reservoir unit genesis.
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Authors: Ivan Nesterov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Mikhail Zavatskij
Abstract: Bottomhole formation zone processing (BFZP) is performed at all phases of oil field development to restore and improve the filtration-capacity properties of the bottomhole formation zone to improve the oil yield. The choice of the BFZP technology is made basing on the study of the reasons for low well yield with account for the collector properties of productive sediments and rheological characteristics of the formation fluids, as well as a special geologic-geophysical and development-hydrodynamic study for the assessment of the porosity and permeability properties of BFZ. The research objective is to develop the criteria and assess the conditions for the application of bottomhole formation zone processing technologies for the upper Jurassic formations. Analysis of the results of laboratory and industrial research allowed offering the most efficient technologies for the influence on the upper Jurassic deposits.
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Authors: Vadim Aleksandrov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Olga Veduta
Abstract: The choice of the most effective technology for reservoir completion depends mainly on the conditions for the formation of its constituent deposits and the specific features of their geological structure. This circumstance makes it possible to predict the productivity of newly drilled wells, transferred to the pay zone, as well as to plan the necessary geological and technical interventions with maximum efficiency. The research objective is to assess the influence of specific features of the geological structure of the production zone on the effectiveness of pay zones completion. Facies maps for productive formations were constructed with the help of paleogeographic and facies methods of analysis; a detailed geological and routine analysis made it possible to numerically assess the tightness of the connection between the development indices and the geological and geophysical characteristics of the objects under investigation.
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Authors: Vadim Aleksandrov, Marsel Kadyrov, Andrey Ponomarev, Denis Drugov, Olga Veduta
Abstract: The establishment of the paleofacial nature of sand bodies is of an utmost importance in the search for lithological traps of oil and gas, and also allows forecasting their spatial location, the position of wedging zones and changes in the reservoir properties of reservoir units. The research objective is to determine the genesis of productive deposits of the Bajocian-Bathonian age and to reveal the features of their geological structure. With the help of facial and electrometric methods of research, facies complexes were identified in deposits of the Bajocian-Bathonian age.
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