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Isaeva A.V.,Zarubezhneft JSC
Neftyanoe Khozyaistvo - Oil Industry | Year: 2011

The present paper is concerned with the question of the automatic well-to-well correlation algorithms development. The new approach to the problem Is proposed based on the newest achievements in mathematical signal and Images processing techniques. With the aid of suggested algorithm particular task of the potentially productive interlayers correlation was solved. It is demonstrated that proposed algorithm In combination with modified krlging technique achieves higher prediction quality than some other predicting techniques.


Zatsepin V.V.,Zarubezhneft JSC | Makatrov A.K.,Rosneft
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

This paper describes results of laboratory tests on the oil displacement efficiency by water and gas. The function between displacement efficiency by water and gas and the reservoir permeability is present.


Ushakova A.S.,Zarubezhneft JSC | Zatsepin V.V.,Zarubezhneft JSC
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

This paper describes results of laboratory tests of oil kinetics of oxidation and self-ignition oxidation process. The function between reservoir temperature and time period of oil self-ignition oxidation is presented.


Poltavtseva E.A.,Zarubezhneft JSC
Neftyanoe Khozyaistvo - Oil Industry | Year: 2013

This article might be of interest to specialists, who study the international experience, particularly, incentives for oil and gas fields' exploration and development. This article describes tax and other incentives granted by the Government of Vietnam to the foreign contractors engaged in operations on remote and deep-water blocks of Vietnam.


Ushakova A.S.,Zarubezhneft JSC
Neftyanoe Khozyaistvo - Oil Industry | Year: 2014

In the present work crude oil oxidation mechanism due to in-situ combustion EOR technology is investigated. The oxidation kinetics' data from calorimetric experiments is expressed in terms of the Arrhenius kinetic approach; the reaction parameters are estimated by several independent methods and used for the reaction model formation. The kinetic reaction model, including kinetic parameters approximation to the reservoir pressure is presented. The model is adjusted in accordance with the kinetic experimental curves.


Ushakova A.S.,Zarubezhneft JSC | Zatsepin V.V.,Zarubezhneft JSC
Neftyanoe Khozyaystvo - Oil Industry | Year: 2015

The new technology of hot vegetable oil injection into oil reservoir before air injection due to in-situ combustion initiation is presented. Kinetic experiments with different vegetable oils were performed in order to select the most reactive vegetable oil. The linseed oil proved to be the most reactive one with the lowest self-ignition temperature. The time of linseed oil self-ignition in oil reservoir was calculated using experimental data. The technology of in-situ combustion initiation includes heating of the vegetable oil at the well head, vegetable oil injection into the oil reservoir , inert gas (nitrogen) injection for pushing vegetable oil from the bottom hole and then gradually oxygen concentration increase due to vegetable oil ignition and combustion beginning .


Ushakova A.S.,Zarubezhneft JSC | Urazov S.S.,Zarubezhneft JSC
Neftyanoe Khozyaystvo - Oil Industry | Year: 2016

The paper is devoted to kinetics of petroleum saturates oxidation with high pressure differential scanning calorimeter (DSC). Petroleum saturates (or paraffines) are main light oil components that are involved in low temperature oxidation with heat output. They almost do not from fuel for high temperature oxidation. Petroleum saturates oxidation perform specific kinetic curves with two areas of heat output at 180-280 ° and 280-380 °. It is unusual for crude oil oxidation which has one peak in this temperature region. It was investigated that first heat peak is caused by radical-chain reaction process and the second one satisfier the Arrhenius kinetics. It has been suggested that some kind of oxidation inhibitors present in the crude oil. The inhibitors (resins and asphaltenes) suppress the free radical chain reactions at initial stage of oxidations and restrain the first oxidation peak. The suggestion was justified by the experiments of hexadecane oxidation mixed with different amount of oil. Then the effect of core presents upon the light oil oxidation process was investigated. Oil and core oxidation curves are almost identical to the petroleum saturates oxidation curves at the initial stage. Oil and core oxidation curves shows the first peak divided into two areas of heat output at 180-280 ° and 280-380 °. Such effect associates with the inhibitor's adsorption at the core surface. Adsorbed components are not included into the oxidation at the initial stages. That's why oil oxidase as petroleum saturates. © Copyright 2016.


Ushakova A.S.,Zarubezhneft JSC
Neftyanoe Khozyaystvo - Oil Industry | Year: 2016

The chain reaction mechanism of oil in-situ selfignition is considered. Up-to-date the investigations in this area were based on thermal ignition mechanism. When oxidation reactions heat output exceed heat dissipation heating of oil and core leads to the temperature rise and selfignition. One draws the conclusion that the combustion front automatically forms in some period which can be calculated. In practice there are several cases when air injection projects were not introduced because no ignition occurs. Hydrocarbon oxidation is free radical chain reaction and the present article shows that selfignition can be described in terms of chain reactions theory - chain explosion. Chain mechanism of selfignition can take place when thermal ignition is impossible because heat dissipation happens quicker than reaction heat output. In this case a characteristic induction period is observed. Induction is expressed in time delay of selfignition - the time when reaction goes without temperature rise until enough free radicals are created and process races up until the ignition occurs.


Ushakova A.S.,Zarubezhneft JSC | Urazov S.S.,Zarubezhneft JSC
Neftyanoe Khozyaystvo - Oil Industry | Year: 2016

They laboratory investigations for air injection EOR projects at light oil deposits were performed. Oil oxidation using differential scanning calorimetry (DSC) and thermogravimetry was investigated in purpose of creating the model of chemical oxidation reactions. SARA analysis and SARA fraction oxidation was done for light oil using DSC with different heating rates. Saturates oxidation has shown the identity of the oxidation curves regardless of the molecular weight. That's why the reaction model construction in terms of SARA fractions is more preferable than in terms of pseudo components divided by molecular weight. The example of reaction model constructing in terms of SARA fractions is showed. Low and high temperature oxidation, pyrolysis reactions are included. The heat output from all the SARA fractions was summarized with the ratio as in the oil. The sum was compared with heat output kinetic curves for oil oxidation. The good agreement for summarized curve and oil oxidation curve was obtained. That means an independent oxidation of different SARA fractions and accuracy of the reaction model as the sum of independently oxidized fractions. © Copyright 2016.


Fomkin A.V.,Zarubezhneft JSC
Neftyanoe Khozyaistvo - Oil Industry | Year: 2012

Vietnam has been producing oil more than 30 years. Main oil reserves are contained In crystal basement rocks. World experience of study and development of such fields shows that In the absence of close analogues many tasks have to be solved tor the first time and that common methods and standards have to be changed greatly. The article gives the results of the many years' studying and observation of oil fields basements development of south offshore Vietnam.

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