Territorija Neftegas № 9 2013
Read in this issue:
» New conceptual approach to protection of submersible equipment from scalesOpen PDF
Designed an efficient conceptual approach to the protection of submersible equipment from scaling. It is implemented in software «SALT» which designed to forecast salt deposition and determination stability index by definition saturation index, and in the intellectual software system of oil production using ESP. Pilot hardware and software system that provides control over the optimization process of inhibitor injection to prevent scaling on downhole equipment, has been successful tested in the Nizhnevartovsk region.
Keywords: scaling, inhibitor, intellectual software system, ESP, software.
» Decrease in technological hazards on underwater transitions of the gas pipeline with dangerous geodynamic processesOpen PDF
It is proposed to perform survey works and monitoring of the hazardous geological processes (landslides, karst, holes, faults) along the Gazprom’s gas pipeline routes using hi-tech technologies based on the radiowave method. Highly efficient automated geodynamical safety methods have already been implemented at several problem areas of the main gas pipeline routes of a number of Gazprom’s subsidiaries.
Keywords: hazardous geological processes, geodynamical safety, landslides, karst, holes, faults, radiowave method.
» Energy saving in main pipeline gas transportation through renewable energy resourcesOpen PDF
Russia is a great energy state, which takes the 3rd place in the world in fuel production and generation of electricity. However, in view of certain circumstances, Russia also takes the 3rd place in the world in power consumption. Gas transport system GTS of Gazprom JSC is one of the largest fuel and power consumers in the country. Each year GTS transports about 700 billion m3 of gas, and about 10% of the pumped gas is spent on the purposes of gas transportation. The authors propose to use alternative renewable (wind and solar) energy sources for energy generation for process needs of CSs, and provide the results of economic and mathematical modeling, which show that application of modern technologies of renewable energy shall practically allow compensating a part of CS power consumption, that, in turn, will allow saving considerable amount of commercial gas for its further sale.
Keywords: power consumption, energy efficiency, renewable energy resources, gas transport system (GTS) of JSC Gazprom, compressor station (CS), captive power plant (CPP), wind-power engineering, wind-driven power plants (WDPP), solar power engineering, PV panels.
» Proposals on provision of information about secondary energy resources (SER) in an energy perfomance certificateOpen PDF
The topical tasks for exploring existing energy saving potential at industrial enterprises are determination of the number of secondary energy resources (SER) and alternative renewable energy resources (ARER) in fuel and energy balances, calculation of their gross, technical and economic potential, and lines for their use. The article offers methods for potential determination of thermal SER of exhaust gases of gas turbine power plants (GTPP) and SER of excess pressure in the main gas transfer system. And proposals on improving the form of energy performance certificate are provided.
Keywords: secondary energy resources, alternative renewable energy resources, energy saving, compressor station, gas turbine power plants, gas distribution plant.
Fields facilities installation
» Management of integrity of the infrastructure facilities of oil and gas deposits. Infrastructure. Principal definitionsOpen PDF
This article is the first one out of series of publications dedicated to the problem of oil and gas field infrastructure facilities maintenance in safe and operable condition. In these series the following problems shall be reviewed: risk management problems related to operation of infrastructure facilities; rating of expenses on repair and protective measures and facilities renewal; problems of the efficiency analysis and economic substantiation of expense for infrastructure integrity management; problems of infrastructure integrity management organization. The article states main concepts and definitions important for further understanding of the integrity management problems. For managers and petroleum engineers engaged into design and operation of ground oil-field facilities and other infrastructure facilities, experts in risk management field, industrial safety and environmental protection.
Keywords: infrastructure, life-cycle, infrastructure reengineering, maintenance of infrastructure in operable condition, infrastructure maintenance expenses, infrastructure integrity, integrity management, industrial safety.
» Research on mechanical properties of fiber reinforced polymer pipeOpen PDF
In the article the results of research on the change in mechanical properties of fiber reinforced polymer pipe (PAT). Describes the dependence of the diameter of the reinforcing element, the apparent modulus of elasticity of the angle-spiral. Described bench installation used for research. Test results carried out according to conventional hardness and modulus values of the internal pressure and axial tension load. Presents a graph of the diameter of the reinforcing elements of the angle-spiral, and the mechanical characteristics of the loading from external forces.
Keywords: reinforced polymer pipe, rigidity test, conditional modulus, helix angle, reinforcing element.
Fields Development and operation installation
» Rise in current gas factor. Influence of gas dissolved in oil-field water on total amount of gas prodused with gas flowstreamOpen PDF
Presented is a method of prediction of K-values for components of natural hydrocarbons mixes on an example of phase behavior of oil fields fluids of Western Siberia. The method gives the best combination of accuracy of received results and simplicity of calculation performance. The interrelation of all designed characteristics is provided with unity of the base information including a minimum of experimentally determined parameters. The method is recommended for engineering flash calculations of oil and gas separation.
Keywords: GOR gas factor, water encroachment, gas dissolved in water, component analysis of gas, crude oil.
» Analysis of suitability of rectilinear positive displacement motors application without the slope angle regulator unit of a pump in the process of well construction at Samotlor depositOpen PDF
Lately, well drilling in Samotlor deposit has been complicated by abnormal low formation pressure. In order to decrease possibility of complications related to drilling mud loss and stability of bore hole walls, the drilling was conducted with minimum consumption of mud fluid and borehole reaming, which reduces effectiveness of cutting transport. The degree of the well cleaning from drilling sludge may be increased due to increase in consumption of mud fluid or drillstem rotation speed in the process of drilling and borehole reaming. In the process of drilling of controlled directional wells with horizontal bottom, we use a standard bottomhole assembly (BHA), in which operators install a screw downhole motor of 1.5–1.8 degrees, which imposes technical restrictions on selection of the optimal well drilling mode, particularly, on rotor rotational speed, which varies from 25 to 40 rpm. This restriction is imposed depending on the limiting value of the BHA body strength properties. At the same time, such rotor and drillstem rotational speeds are not sufficient for solving the problem related to technological regime of drilling and cutting transport optimization.
» Analysis and evaluative forecasting of the gas wells debits dynamicsOpen PDF
This article describes methods for gas well debit dynamics approximation with the course of time and debit forecasting for a med-term period. The proposed methods are based on investigation of average daily debits of a well for the previous period (long period is desirable). As long as the proposed methods do not require hydrodynamic study of the well, it may be used as an express-method for evaluative forecasting.
Keywords: field data, well, debit, time series, approximation, least square method.
Pipelines operation and maintenance
» Estimate of the pipeline stress in the underwater crossing section using its spatial position parametersOpen PDF
A comparative analysis of the stress in a pipeline of the river underwater crossing, determined using equations of motion of the pipeline and with the help of the parameters of its spatial position. The input data for the calculations were transverse movements of the pipeline measured at the underwater crossing when the operating pressure was reset to zero. The applicability of the method for estimation of the actual stress in the pipeline using its spatial position data was demonstrated.
Keywords: gas pipeline, underwater crossing, gas pressure, stress of the pipe wall.
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