Predictive Assessment of Fire Danger Zones at Emergency Events on Oil and Gas Condensate Field

2019 ◽  
Vol 7 (2) ◽  
pp. 71-77
Author(s):  
Татьяна Дроздова ◽  
Tatyana Drozdova ◽  
Р. Суковатиков ◽  
R. Sukovatikov
Keyword(s):  
Oil And Gas ◽  
Gas Condensate ◽  
Field Methods ◽  
Emergency Situations ◽  
Combustible Gas ◽  
Pump Station ◽  
Emergency Events ◽  
Predictive Assessment ◽  
Booster Pump ◽  
Concentration Limits

The aim of the work is to estimate the distribution zones of gas-air clouds with fire-dangerous concentrations during accidents at the booster pump station of the oil and gas condensate field. Methods. Simulation of emergency situations was performed in case of equipment leakage using the TOXI + Risk software package. The analysis of emergency events associated with the release of combustible substances during the depressurization of equipment (separator) has shown the probability of occurrence and spread of combustible gas-air clouds in the environment with concentrations corresponding to the concentration limits of ignition creating the danger of fires.

Ways for Improving Industrial Safety in the Operation of Oil and Gas Wells

2021 ◽  
pp. 48-52
Author(s):  
O.A. Baulin ◽  
◽  
I.F. Khafizov ◽  
T.V. Vasileva ◽  
E.D. Muftakhova ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Turnaround Time ◽  
Gas Condensate ◽  
Industrial Safety ◽  
Thermal Method ◽  
Safety Requirements ◽  
Emergency Situations ◽  
Production Wells ◽  
Hazardous Production ◽  
Stable Gas Condensate

Emergency situations at the oil wells are often caused by the formation of asphalt-resin-paraffin deposits. Removal of harmful deposits increases the efficiency of production wells, increases the turnaround time, prevents emergencies, and, also, reduces the likelihood of an explosive environment. According to the industrial safety requirements for hazardous production facilities it is necessary to take measures to eliminate the causes and prevent such accidents. Therefore, it is required to ensure timely efficient removal of deposits, which in turn requires the improvement of methods and technologies for cleaning wells. Gazprom Dobycha Orenburg LLC uses the technology of the wells heat treatment by means of injection of heated gas condensate. The thermal method of removal has a significant disadvantage, such as melting of the deposits instead of dissolving them, which leads to a rapid buildup of wax on the inner walls of the oilfield equipment. The method is proposed for removing asphalt-resin-paraffin deposits using a modified hydrocarbon solvent, which is obtained experimentally based of the stable gas condensate of the Orenburg oil and gas condensate field using cavitation-vortex effect. The new method is presented for obtaining a solvent by separating a gas condensate fraction using the single evaporation device operating at low temperatures. This method eliminates the influence of high temperatures traditionally used in the fractionating columns for separating gas condensate into fractions and ensures the safety of the technological process and labor of the employees.

scholarly journals Chemical dispersants enhance the activity of oil- and gas condensate-degrading marine bacteria

2017 ◽  
Vol 11 (12) ◽  
pp. 2793-2808 ◽  
Author(s):  
Julien Tremblay ◽  
Etienne Yergeau ◽  
Nathalie Fortin ◽  
Susan Cobanli ◽  
Miria Elias ◽  
...  
Keyword(s):  
Marine Bacteria ◽  
Oil And Gas ◽  
Gas Condensate

Determination of Bubble-Point and Dew-Point Pressure Without a Visual Cell

2014 ◽  
Author(s):  
R.. Hosein ◽  
R.. Mayrhoo ◽  
W. D. McCain
Keyword(s):  
Oil And Gas ◽  
Saturation Pressure ◽  
Volatile Oil ◽  
Phase Region ◽  
Gas Condensate ◽  
Dew Point ◽  
Bubble Point ◽  
Point Pressure ◽  
Dew Point Pressure

Abstract Bubble-point and dew-point pressures of oil and gas condensate reservoir fluids are used for planning the production profile of these reservoirs. Usually the best method for determination of these saturation pressures is by visual observation when a Constant Mass Expansion (CME) test is performed on a sample in a high pressure cell fitted with a glass window. In this test the cell pressure is reduced in steps and the pressure at which the first sign of gas bubbles is observed is recorded as bubble-point pressure for the oil samples and the first sign of liquid droplets is recorded as the dew-point pressure for the gas condensate samples. The experimental determination of saturation pressure especially for volatile oil and gas condensate require many small pressure reduction steps which make the observation method tedious, time consuming and expensive. In this study we have extended the Y-function which is often used to smooth out CME data for black oils below the bubble-point to determine saturation pressure of reservoir fluids. We started from the initial measured pressure and volume and by plotting log of the extended Y function which we call the YEXT function, with the corresponding pressure, two straight lines were obtained; one in the single phase region and the other in the two phase region. The point at which these two lines intersect is the saturation pressure. The differences between the saturation pressures determined by our proposed YEXT function method and the observation method was less than ± 4.0 % for the gas condensate, black oil and volatile oil samples studied. This extension of the Y function to determine dew-point and bubble-point pressures was not found elsewhere in the open literature. With this graphical method the determination of saturation pressures is less tedious and time consuming and expensive windowed cells are not required.

COMPUTER MODELING OF THE SAND BODIES DEPOSITIONAL HISTORY OF THE MIDDLE JURASSIC PETROLEUM PLAY (BY THE EXAMPLE OF THE GERASIMOVSKOE FIELD, WESTERN SIBERIA)

2020 ◽  
pp. 8-13
Author(s):  
M. O. Fedorovich ◽  
◽  
A. Yu. Kosmacheva ◽  
Keyword(s):  
Middle Jurassic ◽  
Oil And Gas ◽  
Gas Condensate ◽  
Facies Modeling ◽  
Depositional History ◽  
Sedimentary Environments ◽  
History Of ◽  
Underwater Slope ◽  
Mouth Bars ◽  
Sand Bodies

The present paper describes the DIONISOS software package (Beicip-Technologies), where the reconstruction of the accumulation conditions and facies modeling of sand reservoirs Yu10, Yu9, Yu8, Yu7 and Yu6 of the Tyumenskaya Formation and carbonaceous-clay members acting as fluid seals within the Gerasimovskoye oil and gas condensate field located in the south of the Parabel district of the Tomsk region. Reconstructions of facies environments make it possible to consistently restore conditions and create a general principled model of the accumulation of sandy-argillaceous deposits of the Middle Jurassic PP in a given territory. Polyfacies deposits of the Bajocian are represented by sands of distributaries and stream-mouth bars, underwater slope of delta, above-water and underwater delta plains, argillaceous-carbonaceous sediments of floodplain lakes, bogs, marshes and lagoons, clays formed at the border of the above-water and underwater deltaic plains, silt deposits of above-water and underwater delta plains, prodelta clays. As a result of the 3D facies model construction, it is shown that the subcontinental sedimentary environments of sand reservoirs Yu10–Yu8 are replaced by deltaic and floodplain-lacustrine-boggy ones, and the formation of Yu7–Yu6 reservoirs occurs in conditions of coastal plain, periodically flooded by the sea. In total, 5 lithotypes of sand deposits have been identified, 1 – argillaceous-carbonaceous, 2 – argillaceous and 1 – silty. Computer facies 3D modeling of the sand bodies assemblage (hydrocarbon reservoirs) of the Bajocian age for the Gerasimovskoye oil and gas condensate field has been performed.

Monitoring the composition of gas condensate well streams based on samples taken from multiphase flow meters

2021 ◽  
pp. 127-139
Author(s):  
E. A. Gromova ◽  
S. A. Zanochuev
Keyword(s):  
Multiphase Flow ◽  
Oil And Gas ◽  
Gas Condensate ◽  
Flow Meters ◽  
Gas Condensate Reservoirs ◽  
Reliable Estimation ◽  
Development Control ◽  
Hydrocarbon System ◽  
Labor Consuming

The article highlights the relevance of reliable estimation of the composition and properties of reservoir gas during the development of gas condensate fields and the complexity of the task for reservoirs containing zones of varying condensate content. The authors have developed a methodology that allows monitoring the composition of gas condensate well streams of similar reservoirs. There are successful examples of the approach applied in Achimov gas condensate reservoirs at the Urengoy oil and gas condensate field. The proposed approach is based on the use of the so-called fluid factors, which are calculated on the basis of the known component compositions of various flows of the studied hydrocarbon system. The correlation between certain "fluid factors" and the properties of reservoir gas (usually determined by more labor-consuming methods) allows one to quickly obtain important information necessary to solve various development control tasks.

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