Territorija Neftegas № 10 2013
Read in this issue:
» Corrosion and stress-corrosion damage to main gas pipelines including the pumped gas elastic energy impactOpen PDF
The methodology to evaluate the tendency of pipe steels and welded joints for corrosion and stress-corrosion cracks initiation and propagation has been developed. Kinetics of single surface cracks propagation in the air and corrosive environment with cyclic load has been studied. Cracks hazard is based on information on their size, growth rate and interference of two and more cracks during their propagation process. The results obtained enable forecasting the cracks hazard level and determining the faulty pipe safety margin.
Keywords: corrosion, stress corrosion, main gas pipelines, stress state, welded joints, elastic energy, surface cracks.
» Energy potential of associated oil gas. Measurement of the breakthrough gas in the total volume of the well productionOpen PDF
Method of online audit and calculation of breakthrough gas into the well is presented. Within the computer modeling on the basis of measurements of the current oil gas content, gas breakthroughs are monitored and its type is determined. The method is recommended for calculation of oil and gas volumes for the purpose of their measuring in deposits of complicated structure.
Keywords: oil, breakthrough gas, energy potential, dissolved gas, audit.
» Method, device for its implementation and the mathematical model for determining the fuel consumption-containing undissolved waterOpen PDF
The article proposes a method for determining the undissolved water in fuel under dynamic conditions with an axially turbine flowmeter. A structural scheme and the mathematical model of the flow and content of undissolved water in fuels, which takes into account characteristics of the various regimes of liquid flow and temperature changes.
Keywords: axially turbine flowmeter, undissolved water, fuel quality, dielectric permittivity, supplying with water of oil products, aviation kerosene.
» Experimental research of SHF parametres cavity resonator in relation to the measurements of free moisture in fuelOpen PDF
In this article results of an experimental study of cylindrical cavity resonator with a thin layer of humidity on the lower end wall are presented. Analysis of the known methods was carried out using simulation by finite element method in the system ANSYS. Practical application of research results can be a detection of precipitated water in aviation kerosene.
Keywords: cavity resonator, precipitated water, fuel quality, aviation kerosene, finite element method, supplying with water of oil products.
» Development of practical solutions to improve efficiency by usage water cut wells stockOpen PDF
It is known that most of the deposits have already been discovered and exploited in various stages of development, and the unallocated fund deposits with large stocks decreases with each passing year. The main part of the producing fields by «Gazprom Neft NNG» JSC is located on the 4th stage of development, characterized by high water production wells, and low oil production rate. In connection with what an important role in the enterprise is working to improve the efficiency of existing wells. This paper presents the results of testing the computer program «program evaluation and cost-effectiveness GTO wells» in the oil well business.
Keywords: efficient well operation, the estimation procedure, wells, wells profitability, economic efficiency.
» Use of light ventilated foundations under gas pumping units on compressor plants in complicated geological conditions of Yamal fields groupOpen PDF
In article innovative technical solutions on construction of the bases under gas-distributing units (GPA) in difficult climatic conditions of the peninsula of Yamal are considered. The economic benefit locates in work from application of «the easy bases» under GPA, their advantage in comparison with the «massive» bases, traditionally erected in a country midland. The advanced model of the soil basis is developed for «easy types of the bases» under GPA. The advanced model of the soil basis considers heterogeneity of the soil basis at performance of dynamic calculation. The absence problem in construction norms of a uniform design procedure of the bases of GPA taking into account the requirement of the Federal law No. 384 is studied. Basic provisions of a uniform design procedure of the bases of GPA taking into account possible emergencies are developed, authors of article consider it necessary to include these provisions in construction norms.
Keywords: Bovanenkovskoe oil and gas-condensate field, the Yamal peninsula, gas pumping unit, requirements to «mechanical safety», progressive collapse, dynamic loads, light foundation, heavy foundation, soil body, grillage, emergency, amplitude of vibration, Federal Law No. 384.
» Analysis of comparability of the results of intrapipeline inspection and rejection of pipesOpen PDF
A comparative analysis of the results of intrapipeline inspection and rejection of pipes of the LLC «Gazprom Transgaz Yugorsk» gas pipelines was held. It is shown that the intrapipeline inspection allows to get only approximate information about the state of a gas pipeline. The monitoring system of the technical condition of pipes is offered. This system would allow to get much more information about the state of underground gas pipes.
Keywords: the gas pipelines, intrapipeline inspection, rejection of pipes, corrosion monitoring, reliability.
» Small diameter wells drilling as the method to reduce costs during construction of operation and exploratory wellsOpen PDF
Deposits drilling-out with small diameter wells makes it feasible to include low productivity reserves in development. Technology for small diameter wells construction reduces financial costs, reduces risks of environmental pollution, and has potential for construction of prospect and exploratory wells.
Keywords: small diameter well, drilling, costs reduction.
» Oil production power in the complicated conditionsOpen PDF
The problem of monitoring of power consumption and way of increase of energy efficiency of oil production is considered. Various ways of definition of integrated indicators of energy efficiency, way of increase of energy efficiency of ESP taking into account the complicated service conditions are analysed. It is shown that one of the most favorable ways of decrease in power consumption is the correct selection of the equipment and working hours of system «a well – pump installation».
Keywords: integrated indicators of energy efficiency, power consumption, oil-extracting equipment, ways of oil production.
Fields facilities installation
» Management of the oil and gas fields infrastructure facilities integrity. Performance indicatorsOpen PDF
This article is continuation of a series of publications launched in No. 9 of the NEFTEGAS Territory magazine. It was noted in the article «Management of the oil and gas fields infrastructure facilities integrity. Infrastructure, main definitions»  that among all the directions of infrastructure investments the most «non-transparent» in terms of the expenses feasibility and efficiency assessment is the «integrity maintenance/ management» versus such directions as for example «development» and «optimization». To substantiate the investment and increase in these expenses efficiency the indicators related to the infrastructure facilities condition and specifying the quality of their maintenance in the operating condition and their integrity management should be determined. The publication, introduced for consideration to the readers, determines the approaches to establish the main performance indicators of the events on maintenance/ management of the infrastructure facilities integrity. For managers and engineers and petroleum technicians engaged in the design and operation of surface oil field and other infrastructure facilities, specialists in the area of risk assessment, industrial safety and environmental protection, assets feasibility study.
Keywords: risk of integrity damage, risk increase dynamics, early accident rate/early leaks, critical operation term, term until the first repair, acceptable risk, Integrity Management KPI.
» A new light on the tectonic structure Gydan oil & gas region (West Siberia)Open PDF
A new tectonic map of Gydan oil and gas region of West Siberia related to the Mesozoic sedimentary cover is completed. The map identifies three tectonic regions: western, eastern and southern with their characteristics. The western tectonic region includes the area from 740 EL up to 760 EL and from 690 NL up to 720 NL. The main area of the western tectonic region is occupied by the depressions and hollows, complicated with structures of the first order i.e. Napalkovsky megalithic bank and with structures of the second order i.e. Utrennee dome. The eastern tectonic region is located eastwards of the western boundary; the main tectonic elements are monoclines and terraces. The structures of the first order are: Gydanskaya terrace on which the Gyda dome is located and two heights: Yuratsky, Nevuyakhinsky and Taimyr monocline. The Southern region (Messovskaya ridge) is a unique structure of complicated bars and local uplifts, where 11 fields are discovered. The paleotectonic analysis of various order structures is made for the three regions. The following fields are discovered: Utrennee dome, Gydan dome, Geofizichesky megalithic bank and Tato-Yakhinskaoe dome. The history of their development is described in the article.
Keywords: oil and gas bearing region, paleostructure maps, paleotectonic reconstruction, tectonic map, tectonic analysis, Gydan oil and gas bearing region, first and second order structures, tectonic regions, deposits of Utrennee, Gydanskoe, Geofizicheskoe, Tota-Yakhinskoe, Jurassic, Cretaceous systems, Mesozoic era.
» Consistent patterns found during log-inject-log surveys to specify the geology of oil deposits of complicated structureOpen PDF
The authors publishing the results of the log-inject-log surveys note that content analysis of substances tracers injected with water when developing oil fields soluble in it, in water samples enables to establish connectivity between beds (horizons) and determine the well - source of water troubles. These tasks were solved by analysis of the tracer injection in production wells irregardless of their operational characteristics.
Keywords: log-inject-log, increase in oil recovery, water flooding, connectivity, tracer, tectonic deformations, splits openness, brachyanticline fold, Jurassic horizon, cretaceous horizon.
Fields Development and operation installation
» Monitoring of reliability of oil gas objects by methods of the system analysisOpen PDF
Authors develop a complex of models, techniques, algorithms, technologies of an estimation and the analysis of reliability of objects with application of methods of the system analysis for system of anticipatory control for oil and gas objects. The system can function in a mode of real time by results of diagnostics, certification, certification of maintained objects, to the dispatching data. Results of research allow to raise efficiency of decision-making at the enterprise, are developed taking into account legislation requirements on safety.
Keywords: reliability, indicators, forecasting, monitoring, decision-making.
» Analysis of the standards governing the determination of the impact of the ice fields of technical facilitiesOpen PDF
The article contains comparative analysis of methods for determining the load on smooth ice fields on a cylindrical support unit platform, the existing standards.
Keywords: Arctic shelf, ice loads and impacts, smooth ice field, ice resistance to compression.
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