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| new publications |
24.12.08, A.F. Shakurova
RESEARCH ANALYSIS OF GEOLOGICAL AND PHYSICAL FACTORS, INFLUENCED ON MURIAFIC FREATMENTS EFFECTIVENESS IN MIDDLE-VOIGA-RIVER REGION CONDITIONALS
http://www.ogbus.ru/authors/Shakurova/Shakurova_2.pdf (in Russian)
Here it is shown analysis of muriafic treatments effectiveness for increasing water intake capasiti, operating Tournasian and Bashkir fiers. It is explored the influense of different fluid loss propeties. Capacitive and collector characteristic measures on pickup increasing after muriafic freatments. Here resume and recommendations are formulated for arrangement, directed for increasing the effectiveness of this technology in "Samaraneftegas" public corporation term.
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23.12.08, Mohammed Thaiban Al-Garni, Bandar Duraya Al-Anazi
INVESTIGATION OF WETTABILITY EFFECTS ON CAPILLARY PRESSURE, AND IRREDUCIBLE SATURATION FOR SAUDI CRUDE OILS, USING ROCK CENTRIFUGE
http://www.ogbus.ru/eng/authors/Al-Garni/Al-Garni_1.pdf
The main task of a petroleum reservoir engineer is to produce oil and gas reservoirs with maximum economic rate and reaching the ultimate recovery. Reservoir evaluation processes need a reservoir description as completely and accurately as possible using a variety of methods from seismic and well testing to logging, cuttings analysis and coring. These methods present the engineer with a valuable and wide range of scales of information to well evaluate the reservoir and control its performance and improve oil recovery. The main goal of core analysis is to reduce uncertainty in reservoir evaluation processes created by the uncertainty degree in the input parameters at the different levels from reserve estimate level to the enhancement of reservoir performance level. In order to reach these targets, the exact determination of certain petrophysical properties are necessary such as rock porosity, relative permeability, water saturation, and capillary pressure at all stages of reservoir life and rock wettability. Predicting reservoir wettability and its effect on fluid distribution and hydrocarbon recovery remains one of the major challenges in reservoir evaluation and engineering. Current laboratory based techniques require the use of rock-fluid systems that are representative of in situ reservoir wettability. Several parameters like relative permeability's, residual saturations, and capillary depressurization curves change with the wettability state of the reservoir. In addition all these parameters, can greatly impact oil recovery. Thus, there is a need to relate all these parameter to wettability state of the reservoir.
In this study, irreducible oil saturation and capillary pressures using rock centrifuge measurements for Berea Sandstone rock samples and Saudi oils will be tested during drainage and imbibitions cycles by varying each time the wettability of the tested samples by using different Saudi oils (Heavy, Medium, and Light). The capillary pressure for the aged samples will be measured again by the rock centrifuge. Hence, the changes in capillary pressure curve before and after wettability alteration will be obtained. Hence, wettability, capillary pressure, initial fluids saturation, will be correlated for Saudi reservoirs.
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05.12.08, A.M. Alimzhanov
SPACE AXIS SYMMETRIC STABILITY OF VERTICAL WELL IN MASSIF WITH LAYER OF ROCK LOWERED PHYSICO-MECHANICAL CHARACTERISTICS
http://www.ogbus.ru/authors/Alimzhanov/Alimzhanov_1.pdf (in Russian)
Space axis symmetric stability of elastico-plastic equilibrium of vertical well in massif with layer of rock lowered physico-mechanical characteristics has been researched in this work. The Coulomb-Mohr condition as a durability criterion is used in this research. Statements of Stability Theory in Rock Mechanics elaborated by prof. M.T. Alimzhanov are used in this research. The next "stability parameters" of vertical well has been defined: critical radius of zone of inelastic deformations, critical density of drilling mud and critical displacement of a well contour.
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27.11.08, Abouzar Mirzaei Paiaman, Bandar Duraya Al-Anazi
USING NANOPARTICLES TO DECREASE DIFFERENTIAL PIPE STICKING AND ITS FEASIBILITY IN IRANIAN OIL FIELDS
http://www.ogbus.ru/eng/authors/Paiaman/Paiaman_2.pdf
This paper presents new method to prevent stuck pipe or at least to decrease its probability while drilling of oil and gas wells. This method which is applicable in both vertical and deviated wells incorporates using nanoparticles in drilling mud composition to decrease mud cake thickness. So by having less mud cake thickness, probability of stuck pipe decreases. Also different mechanisms of stuck pipe in Ahwaz and Abb-Taymoor oil fields are considered and new approach is suggested to use, while drilling of most sensitive formations respect to stuck pipe in these oil fields.
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13.11.08, Abouzar Mirzaei Paiaman, Saman Azadbakht, Bandar Duraya Al-Anazi
OPTIMIZING WELLBORE INCLINATION AND AZIMUTH TO MINIMIZE INSTABILITY PROBLEMS
http://www.ogbus.ru/eng/authors/Paiaman/Paiaman_1.pdf
Wellbore stability is of critical importance in the success of drilling operations. One of the main goals of any drilling mission is to drill the well as cost-effective as possible. Wellbore instability can be detrimental to this goal. Therefore, wellbore stability analysis has been included in well planning stage of many companies.
Wellbore stability is a function of several factors such as inclination and azimuth, in-situ stresses, mud weight, rock strength parameters, etc. Some of these factors are controllable and some are not. Among the controllable factors are inclination, azimuth and mud weight. By changing these parameters, one can reduce stability problems significantly. Theoretically, it is possible to design the well trajectory in a way to face least stability problems.
In this paper linear elastic constitutive model along with Mohr-Coulomb failure criterion have been utilized to perform stability calculation for different inclinations and azimuths. It is shown that drilling wells parallel to minimum in-situ horizontal stress causes less stability problems. Also the effect of in-situ stress field on wellbore stability has been investigated and it has been demonstrated that in the case of high difference between the in-situ stresses, the optimum path for a well is a low inclination and an intermediate azimuth.
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07.11.08, A.S. Galeev, N.I. Mindiyarova
THE APPLICATION OF THE ULTRASONIC FIELD FOR INCREASING THREADED GOINT SERVICE LIFE
http://www.ogbus.ru/authors/GaleevAS/GaleevAS_1.pdf (in Russian)
The article considers the results of the experimental investigations of the effects jf the ultrasonic field on the process of the tubing screwing up - unscrewing. The influence of the ultrasovic field on the friction forces in the process of scewing up - unscrewing has been determined. The linear temperature elevation of the threaded connection in the process of screwing up - unscrewing has been determined in so doing temperature elevation rate is twice less in case of oscillations superimposition then without ultrasonic oscillations.
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29.10.08, A.Sh. Ramazanov, R.K. Akhmetov
THE EVALUATION OF POSSIBILITIES OF AUXILIARY WELLBORES TESTING USING TEMPERATURE CHANGES IN THE WELL
http://www.ogbus.ru/eng/authors/Ramazanov/Ramazanov_3e.pdf (in English)
http://www.ogbus.ru/authors/Ramazanov/Ramazanov_3.pdf (in Russian)
In this paper the question of utilizing borehole temperature measurements potentialities to determine inflow intervals of the auxiliary wellbores without getting into auxiliary wellbore is studied using mathematical calculation. Convection heat transfer in auxiliary wellbore and thermodynamic effects (barothermal and throttling or Joule - Thomson effect) in formation are taken into account.
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24.10.08, N.G. Nurgalieva, D.I.Khasanov
THERMOMAGNETIC MARKERS IN STUDIES OF THE RESERVOIR ROCKS
http://www.ogbus.ru/eng/authors/Nurgalieva/Nurgalieva_3.pdf
Thermomagnetic curves of reservoir rocks have been studied as markers of substance and reservoir rocks formation. In the temperature range of 400-530C it is observed an increase in the magnetization (maximum it is reached about 500C), then it goes the decrease in the magnetization of the newly formed magnetite, and it is sometimes visible the decrease in the magnetization of hematite (650-680C). The curves of the second heating differ more considerably, which depends on the content of Fe, sulfur, organic matter in samples. A series of the peaks are observed in the temperature range from 250 to 400C. These peaks are caused by magnetostatistical interaction of the generated pyrrhotine and magnetite. Since these minerals are formed into some aggregates, we observed temperature of Curie of pyrrhotine by the peak of the relative increase in the magnetization, caused by the transformation of magnetic and nonmagnetic sulfides into the magnetite (between 400C and 500C). This behavior is characteristic for the samples, which contain pyrite. Roughly, a quantity of pyrite can be evaluated on the decrease in the magnetization to ~400C. The presence of ferrous minerals, especially pyrite, not only decreases capacitive properties, but also it is the mineralogical factor, which influences the safety of the meta-stable phases of clay minerals.
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06.10.08, Volko de Jong, Ruud Weijermars
CLOSING COMMUNICATION GAPS CAN IMPROVE THE SUCCESS OF OIL & GAS VENTURES
http://www.ogbus.ru/eng/authors/Jong/Jong_1.pdf
For nearly a century, National Oil Companies (NOCs) and International Oil Companies (IOCs) have jointly executed the challenging task to match the global energy supply and demand schedules. Increasingly, IOCs struggle for access to reserves, controlled by NOCs, as follows from an inventory of the regional spread of reserves. The global increase in energy demand and unequal access to reserves has an important consequence: negotiations and relation management involve mutual stakes higher than ever before. This situation implicates that even the smallest flaw in effective communication between stakeholders (professionals, companies and governments) may result in an adverse impact on the outcome of the business cooperation - causing loss of business value. Communication between people in the international Oil & Gas business involves professionals that are naturally endowed with not only a range of human emotions but they also come from a diversity of cultures. The impact of cultural diversity on business efficiency is certainly not new to the Oil & Gas business, but still intensifies due to globalization. Nonetheless, the interaction between social groups and proper management of human emotions is often neglected in an industry already dominated by formidable technical challenges that require stout determination to overcome.
We highlight the need to build intercultural bridges and necessity of dedicated training in the area of Emotional Intelligence. The model of Cornelis 'Feeling's Logic' is adopted and adapted to codify risks related to culture, personal skills, and self-actualization. The model is applied to Gas Trade relationship between Europe and Russia.
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27.08.08, A.G. Gavrilov, A.N. Mardanshin, M.N. Ovchinnikov, A.V. Shtanin
THE WELL NEIGHBOURHOOD TESTING BY HIGH FREQUENCY FILTRATIONAL WAVES METHOD
http://www.ogbus.ru/eng/authors/Gavrilov/Gavrilov_1e.pdf
http://www.ogbus.ru/authors/Gavrilov/Gavrilov_1.pdf (in Russian, published at 24.05.07)
The vertical wells investigations are shown by the harmonic filtrational pressure waves method for shot time periods with minutes and tens minutes. The conclusion is made about the actual by putting the depth and mouth devices to well porous neighbourhood conditions. The special features of the interpretation the similar experimental results is considered.
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26.08.08, P.S. Fakhretdinov, D.N. Borisov, G.V. Romanov, Yu.P. Hodyrev, R.M. Galiakberov, A.Sh. Ziyatdinov
THE INHIBITION OF THE CORROSION BY AMINO- AND AMMONIUM COMPOUNDS DERIVED FROM α-OLEFINS AND OXYETHYLATED NONYLPHENOLS.
http://www.ogbus.ru/authors/Fahretdinov/Fahretdinov_2.pdf (in Russian)
A series of new N,N-diethyl-N-[nonylphenoxypoly(ethylenoxy)carbonylethyl]amines and N,N-diethyl-N-[isoalkyloxycarbonylmethyl]-N-[nonylphenoxypoly(ethylenoxy) carbonylethyl]- Their corrosion-resisting properties were investigated. Several effective corrosion inhibitors in carbon-dioxide media were found. Ammonium compounds with chloride anion and organic acids anions have been synthesized.
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20.08.08, P.S. Fakhretdinov, D.N. Borisov, G.V. Romanov, Yu.P. Hodyrev, R.M. Galiakberov, A.Sh. Ziyatdinov
THE INHIBITION OF THE CORROSION BY AMMONIUM COMPOUNDS DERIVED FROM &alfa;-OLEFINS
http://www.ogbus.ru/authors/Fahretdinov/Fahretdinov_2.pdf (in Russian)
The corrosion-resisting properties of quaternary ammonium compounds (such as N,N-dimethyl-N-alkyl-N-(isoalkyloxycarbonylmethyl)ammonium compounds derived from α-olefins with organic acid anions have been investigated. A number of substances revealed high efficiency as iron corrosion inhibitors in carbon-dioxide mineralized water environments.
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12.08.08, Shobhit Agrawal
HOW FUTURE CONSCIOUS ARE THE OIL CZARS?
http://www.ogbus.ru/eng/authors/ShobhitAgrawal/ShobhitAgrawal_1.pdf
This very article deals not only with the aspects in relation to oil preservation, policies taken up by the concerned government but also about how the various models of society dealt in with regards to oil preservation and how this problem now has taken a u-turn and how its gravity is increasing with every single hour and it's a general fact that complete loss of oil column is generally observed where the crest of the trap is bound by a typically large fault with high post rift displacements. The use of mineral oil for the preservation of species of Pseudomonas is described and a linkage has been drawn with the Energies of the G-8. The G-8's major and decisive role would be in locating on a priority basis other renewable energy sources that will reduce the fuel consumed by all sectors worldwide.
The developing countries can play a vital role by reducing their dependence on crude oil. Both the developing and the developed countries should encourage the use of non-conventional sources of energy, in all areas. More research and development is also required to make industry less dependent on petroleum products and to develop organic alternatives. A large part of this article deals with the aspects of "What we can do and how", focusing on the aspects of sustainable development and its use and also emphasis has been given to other aspects as to role of media, views of antagonists and protagonists and the author had tried to include the data also with regards to fall in production and rapid increase in consumption and also some ways are suggested to overcome this effect and various studies are also incorporated as economic worries, particularly about a slowdown in the United States, the world's largest oil consumer, is one reason the cartel may have agreed [can use as a cover excuse for holding] to hold output steady and also the result of US's consumption of oil has also been included. Much of the emphasis has also been laid down on OIL PEAK concept.
A comprehensive over view has been taken and the author had tried to cover all the important aspects felt to be relevant and had pointed out to a situation which will arise when there will still be plenty of oil flowing in 2020; it just won't be anywhere near enough to satisfy world demand, and as such will be too expensive for many of us to continue to use in the same amounts that we do today. The time to start preparing for a low-energy economy is now.
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17.07.08, Adel M. Hemeida, Ahmed A. Gawish
FORMATION DAMAGE TESTS OF SOME COMPLETION FLUIDS
http://www.ogbus.ru/eng/authors/Hemeida/Hemeida_2.pdf
Completion and workover fluids are invading into the producing zone causing formation damage. This damage may be induced due to precipitation of some solid particles suspended in workover fluids or incompatibility of workover fluids with producing formation, formation water and crude oil. Therefore, brines are commonly used as workover fluids. In the present work, a laboratory study was carried out to investigate the effect of employing some workover fluids on formation permeability. Workover fluids used were 8.5 ppg low density calcium chloride brine, 14.5 ppg high density calcium chloride/calcium bromide brine, low density brine with 0.3 % surfactant and high density brine with 0.3 % surfactant (Petronate). Results showed that damage may be reduced when low density calcium chloride fluids are used. Also, the addition of surfactant (Petronate) to the workover fluids can improve formation permeability and reducing formation damage.
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16.07.08, M.I. Hakimjanov, S.V. Svetlakova, B.V. Guseev, Y.U. Soloviev, I.D. Muzalev
THE COMPARATIVE ANALYSIS OF FUNCTIONS OF THE RUSSIAN AND IMPORT SYSTEMS OF AUTOMATION OF ROD PUMP WELLS
http://www.ogbus.ru/authors/Hakimyanov/Hakimyanov_4.pdf (in Russian)
In this report writers esteem russian and import systems of automation of rod pump wells. The authors have made the comparative analysis of their functions and prices. The authors analyze the reasons of popularity of import systems of automation of wells.
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15.07.08, R.V. Romashin
MATHEMATICAL MODEL OF THE FULL-TURN ACTUATOR FOR BALL VALVES
http://www.ogbus.ru/authors/Romashin/Romashin_2.pdf (in Russian)
The mathematical model of the new actuator for valves is offered. Initial parameters and algorithm of calculation of mathematical model are reduced. Graphs of change of some parameters of the actuator are presented. It is established, that at sampling the actuator in the capacity of principal parameter to accept steel intensity of the drive more favourably. Comparative gabarits of the new actuator and the actuator of model MT255-2/200-S-GH of Ledeen Corporation is shown.
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