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Geomodel 2015 - 17th science and applied research conference on oil and gas geological exploration and development
- Conference date: September 07-10, 2015
- Location: Gelendzhik, Russia
- Published: 07 September 2015
181 - 189 of 189 results
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Estimating Exploration Program Efficiency and Sufficiency: a Case Study of Chonskiy Oil Fields
Authors A. Sizykh, A.M. Vashevnik, A.S. Goncharov and B.V. BelozerovSummaryEast Siberia Chonskiy oil fields group belongs to Nepskiy arch and has many geological uncertainties and risks. The goal of an exploration program is to reduce these uncertainties to maximize the value of the project. To find an optimal exploration program we need to decide which uncertainty should be reduced first and when to stop exploration. We introduce a methodology to calculate an expected monetary value for an exploration program. These calculations allow us to decide whether the program is sufficient and efficient as well as to optimize it. Calculation results for Chonskiy oil fields group are presented
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Pre-Conditions for Oil-Bearing Capability of the Pre-Jurassic Formation Complex in the Southern Region of Central Uvat Based on Seismic Data
Authors O.V. Elisheva and A.A. MikhailovSummaryTo discover the pre-conditions for oil-bearing capability of the Pre-Jurassic formation complex in the southern region of Central Uvat, the seismic correlation of Pre-Jurassic formations and the analysis of lateral distribution of the dynamic attribute RMS Reflector A+50 were performed. Based on the results of the works, suggested fracturing zones were detected, which are associated with the areas of prospective oil deposits in the Pre-Jurassic formation complex on the territory under study
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Geological Structure and Productivity Prospects of the Middle-Jurassic Sediments of the Beshkent Depression
Authors V.V. Serov, A.M. Karpov and D.B. BatmanovSummaryThe positive evaluation of the petroleum potential of terrigenous deposits of Middle Jurassic age demonstrates the need for further studies of the stratigraphic level of the section. (complicating factors of the structure of clastic sediments Baysun suites are the presence of breakthrough trends in shallow-marine parts of the section. In many cases, the development of such formations without facial conditions is associated with the following problems: identification of areas of sharp lithological transitions and claying, premature watering, recoverability of reserves below the forecast, etc.
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Search for Promising Targets in Triassic Sediments North of Western Siberia
More LessSummaryOn the basis of a joint analysis of the dynamic characteristics of the wave field (absolute amplitude, the average energy normalized amplitude envelope of the second derivative), and the results of the drilling of deep wells SG-7, highlighted promising gas-saturated object of deep clastic sediments of the Upper Triassic. Similar objects that formed in the areas of terrigenous sedimentation associated with the rift troughs are prime targets find gas deposits at great depths within the northern part of the West Siberian Plain.
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Improvement of Methods Decreasing Salt – Measures Talakan Field’s Wells
Authors V.A. Gerasimova and M. IvanovaSummaryObjective: to improve the fight against scaling of wells Talakan’s
Parts of the work:
- Analysis of the activities of anti-scaling;
- Choosing the most effective inhibitor of scale;
- Calculating optimum flow scale inhibitor in wells;
- Calculation of the duration of effectiveness of the inhibitor.
The NGDU “Talakanneft” in the range 750–1050 m lie salt deposits represented mainly by calcium chloride and sodium chloride. Salt deposits under the influence of rock pressure, characterized as impenetrable, allowing them to fulfill the role of tires oil deposits. Beneath them lies a producing formation Osa horizon. To combat the deposits of inorganic salts in the production wells in NGDU “Talakanneft” used inhibitor HEDP (oksietilidendifosfonovaya acid).
Talakanskoye field dominated by chloride ions, so in order to protect the well the new PAF inhibitor-1 (polyethylenepolyamine - N - methylphosphonic acid) has been selected and designed, which in terms of “duration of effectiveness” and “consumption” outperformes widely used inhibitor HEDP. Calculating by Kaschavtseva method inhibitor protection PAF-1 (polyethylenepolyamine - N - methylphosphonic acid) showed that inhibitor consumption is reduced by 31%, 47%, 32% and the duration of an inhibitor’s effectiveness is increased by 34%, 41%, 36% for the corresponding wells
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Assessment of Caprock Fluid-Resistive Characteristics of Pre-Urals Fore Deep Southern Part
Authors A.V. Osipov, A.S. Monakova, M.V. Zakharchenko and R.N. MustaevSummaryOne of the main reasons for failure during the exploration for oil and gas is poor properties of caprocks. The analysis of models of generation and accumulation of hydrocarbon-systems (GAHC), including all necessary elements (source rock, reservoirs, impermeable layers, overburden rocks) and processes (generation, migration and accumulation of hydrocarbons and the formation of traps) for the formation of hydrocarbon deposits in the sedimentary basin allows to minimize the risks associated with the unreliability of caprocks and thus with the security of deposits of hydrocarbons (HC).
In order to the reliability assessment of caprocks and degree of deposits preservation within the Orenburg part of the Pre-Urals fore deep and by using the PetroMod software (Schlumberger) the geological model of the area of research was formed and studies of the distribution of capillary pressure in time was conducted for four generation-accumulative hydrocarbon systems, corresponding to the four oil and gas complexes (OGC): Lower Devonian, Frasnian, Frasnian--Tournaisian, Visean-Bashkir and Lower Permian
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Differentiation of the Productive Series of the Orenburg Field on the Results of Drilling Deep Wells, Seismic Acquisition and Development
Authors M.P. Trifonova, M.A. Politikina and S. V. BagmanovaSummaryThe digital geological model of the unique Orenburg oil and gas condensate field has been clarified and detailed in the summary of completed research papers on the differentiation of productive array carbonate deposits on the results of drilling of deep wells, seismic surveys and development. Was analyzed and summarized all the geological and geophysical information for almost 50 year period. In the studies performed a detailed differentiation of the productive series ONGKM was done the separation based on lithophysical properties, assessment of heterogeneity on capacitive and filtration parameters, the estimation of sulfation and bituminisation the ONGKM in area and section, the analysis of fracture propagation and connections of seismic attributes with different geological settings
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Geological, Technical and Technological Conditions of Oil and Gas Development in the Arctic Shelf of Russia
Authors R.N. Mustaev, G.Y. Shilov, U.S. Serikova, V.I. Ermolkin and A.S. Gadzhi-KasumovSummaryEstimation of petroleum potential of the Russian Federation shows that the bulk of reserves growth, increase and stabilize the production of hydrocarbons is planned to be at the expense of attracting resources of the Arctic zone of Russia.Organization of exploration and production work on the Arctic shelf is generally dependent on climatic factors such as water depth, the presence of ice and duration of the inter-ice period. The development of offshore hydrocarbon fields is undoubtedly a difficult technical problem, the solution of which is necessary to use a systematic approach.
The development of hydrocarbon resources of the continental shelf has several fundamental differences that lead to different approaches to preparing project technical documentation.
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Interesting Geological Features of Sedimentary Cover in Western Siberia Using a License Area of NK Rosneft in Irkutsk Region as an Example
Authors A.V. Gaiduk, A.V. Mityukov and A.V. FilichevSummaryOver 40 years of geological exploration within Nepa-Botuoba Arch, which is a part of the Siberian platform, still left many uncertainties related to geological history of outstanding structures. Those uncertainties include a history of tectonics, paleogeographic conditions of HC accumulation, distribution of facies and poroperm parameters of ancient Vendian-Cambrian terrigenous-halogen-carbonate deposits comprising a sedimentary cover of Nepa-Botuoba Arch.
For the last 8 years NK Rosneft has been actively involved into geological exploration activities within Nepa-Botuoba Arch ( Figure 1 ), which led to some discoveries of significant hydrocarbons reserves in the Vendian and Lower Cambrian carbonates equaled to 0.5 BTOE only within Nepa-Botuoba Arch. It should be noted that geological and geophysical data interpretation helped a lot to clarify a geological structure of sedimentary cover, and identify various geological objects by both a nature of their origin and morphology. Given the age of sedimentation (predominantly the Vendian-Cambrian) and tectonic events (PR, Є1at, D3fm-C1v) geological features within sedimentary cover and basement of the Siberian platform present a particular scientific and practical interest.
This report is focused on identification of local and regional geological features characterizing the Nepa-Botuoba Arch structure
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