Territorija Neftegas № 10 2014
Read in this issue:
» Computational modeling of contact interaction between rotor and elastic stator in single-screw hydraulic machines
This article deals with the computer modeling method of contact interaction of screw operating devices, taking into account elastic properties of the stator covering that can be used in calculations, mathematical modeling and optimization of planetary and rotary hydraulic machines, compressors and mechanical transmissions with cycloidal gear of operating devices, and practical examples are given for use of this method when determining contact voltages in the rotor-stator pair of downhole screw motor with various geometrical parameters of profiles and direction of the operating forces.
Keywords: positive displacement motor, compression diagram, clearance, contact; single-screw hydraulic machine, operating elements, rotor, stator, elasticity, cycloidal gearing.
» Organizational and technical planning and supervision of works during capital repair of linear pipeline portion of main gas pipeline of LLC «Gazprom transgaz Volgograd»
Usage of automatic systems for analysis of diagnostic data of gas transporting companies allows to significantly increase efficiency and quality of decisions made on taking the out the parts of gas pipelines for capital repair or renovation. The given paper describes the automatic system evaluated and implemented in OOO «Gazprom transgaz Volgograd» for analysis of diagnostic data which allows to record the data of pig-assisted inspection, integrated electrometric inspections, pitting results and other technical data.
Keywords: сapital repair, pig-assisted inspection, integrated electrometric inspection, pitting, automatic system for analysis of diagnostic data.
» Research into cement stone strength characteristics and specific weight of vermiculite-based well slurry for oil and gas wells lining
The article deals with use of expanded vermiculite as an alternative additive for reducing specific weight of well slurry. This article studies research into the tendencies of changes to the well slurry material specific weight when using expanded vermiculite in various concentrations and describes a number of experiments performed to study the strength characteristics of cement stone using expanded vermiculite.
Keywords: expanded vermiculite, cement stone, well slurry material, specific weight, strength.
» Improvement of geometry of roller reamers structure
Results of work aimed at improvement of geometry of roller reamers structure due to use of helical structure.
Keywords: roller cutter drilling bit, helical structure, roller reamer.
» Causes and parameters of short-term perturbations of power supply of industrial facilities
Considered the basic parameters of the short-term violations of power supply. Based on the analysis of literary sources and data exploitation is defined characteristic ranges of these parameters, which can be used as an initial data to the simulation conditions and processes of industrial electrical systems. Based on the analysis of thunderstorms voltage dips, ascertained a requirement and modified the design scheme of modeling an independent of power supplies sources in centralized electrical power systems. Stressed the need to improve the level of lightning protection of overhead power lines supplying oil and gas industry.
Keywords: power supply systems, independence of power supplies, short-term violations of power supply.
» Specific features of the VAT benefit application when implementing R&D projects
The authors of this paper consider the specific features of applying the value added tax (VAT) benefit when performing research and development (R&D). R&D performance with and without application of the benefit, as well as the efficiency and possibility to use the same is analyzed.
Keywords: R&D, VAT, benefits.
» Lithological-capacitive models of the productive reservoirs of stratums O1, O2, O3 of odnorodnii uplift of the Buzuluk depression of Orenburg region
The article presents lithological-capacitive models of the productive reservoirs of stratums O1, O2, O3 of Odnorodnii uplift of the Buzuluk depression of Orenburg region. It focuses on the rocks composing the stratums, types of collectors of these stratums, according to which built the lithological-capacitive model necessary for further interpretation of different kinds of data.
Keywords: lithological-capacitive model, capacitive properties, the collector.
» Methods for calculating the shock downhole vibroseismic formation stimulation
With the accelerated growth in the share of difficult-to-recover oil reserves there is a need for development of innovative methods for increasing the oil recovery that can satisfy the current energy efficiency requirements. Wave techniques stand out among other tertiary development methods as they allow considering the natural tendency of hydrocarbon fluids towards movement by gravitational and capillary force gradients, as well as using the power potential of the rock mass.
Keywords: Wave methods of enhanced oil recovery, vibroseismic stimulation, kinetostatics analysis principle.
» Development and testing of rod blades of progressive cavity pumping units for oil production
Rod blades that rotate together with rods were developed in order to increase hydraulic head of progressive cavity pump. Positive data have been acquired upon completion of bench- and field tests.
Keywords: Progressive Cavity Pump, rod blade, hydraulic head, bench tests, head coefficient.
Fields Development and operation installation
» Water treatment systems to maintain the reservoir pressure and oil processing and pumping
The structural designs of multistage systems for mechanical impurities removal from process water and the results of their application at the facilities of LUKOIL-Perm LLC are represented.
Keywords: process water, mechanical impurities, reservoir pressure maintenance system, oil processing system, separators, filters.
» Methods for building the curves of relative phase permeabilities in Tempest-More by analytical dependencies
Hydrodynamic model adaptation to the actual data of the development history is a very important stage in the practice of building the hydrodynamic models of hydrocarbons fields’ development. When adapting the model to the development history, the curves of fluids relative phase permeabilities in the systems «oil-water» and «liquid-gas» are most frequently subjected to adjustment. There are known analytical dependencies that may help to build the curves of fluids relative phase permeabilities. These dependencies are used to write script-files for calculation in Tempest-Enable module in Perl programming language. Using Tempest-Enable module during the model adaptation to the development history allows specification of the value of the variables included in the analytical dependencies. The calculations performed on the basis of these dependencies in Tempest-More hydrodynamic simulator demonstrated high level of conformity of the petroliferous facility development design indicators with the actual ones.
Keywords: hydrodynamic model, fields adaptation according to the actual data of the development history, curves of fluids relative phase permeabilities, analytical dependencies for building the curves of fluids relative phase permeabilities, end points of the relative phase permeabilities curves, Tempest-Enable, module, Tempest-More module, script-files, input dat-files of the models.
Pipelines operation and maintenance
» Representation of the distances from the main gas pipelines axis to the facilities and structures for buried arrangement in the form of analytical dependencies
This paper deals with industrial safety of main gas pipelines, as well as with use of computational equipment for functional and analytical dependencies implementation in order to determine minimum distances from the main gas pipelines axis to the facilities and structures for subsurface pipelining. The described approaches enable assurance of minimum distances standardization in view of the gas pipelines industrial safety, which subject is closely monitored by the specialists of the fuel and energy complex in the USA and in a number of leading European countries, involving the risk methodology that helps not only to consider the probabilistic nature of accidents and identify a hazard in terms of quality, but also outline the efficient methods and means for the risk reduction to an acceptable level. Certain researches in this regard are being conducted in Russia as well. However, currently there is no unified scientific and methodical base of the researches conducted in this field of expertise, which hampers its efficient use at the fuel energy facilities, in particular, in one of its most important process chain links - main gas pipelines.
Keywords: main gas pipeline, operational risk, environment, standardization of minimum distances, failure, probabilistic methods, statistical methods, facility significance, operating pressure, gas pipeline diameter.
» Combined using gas tank protection system of oil-loading terminals from hydraulic shock
The problem of protection of oil-loading terminals from hydraulic shock waves is studied in the paper. As a means of protection so-called «combined protection system» is considered. The system consists of a gas cap installed directly on the quay where shortage of free space is an issue, and safety valves mounted onshore. The gas cap is a relatively small sealed vessel partially filled with inert gas that is installed in front of marine loading arms. On-shore part of the device represents safety valves that open in case of pressure wave exceeding tunned-up level. The gas cap used in the device is primarily intended to stretch in time the process of surge wave forming, whereas safety valves allow minimizing pressure level in the pipeline. Advantages of proposed device are considered and analysis of the device construction impact on effectiveness is conducted.
Keywords: oil-loading pipeline, oil-tanker terminal, water shock waves, gas hood-cap, gas tank, air cushion surge chamber, hydraulic shock absorber, mathematical modeling, method of characteristics.
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