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Kutovoy A.S.,Research and Engineering Institute | Ivanov A.N.,Research and Engineering Institute | Trung H.N.,Research and Engineering Institute | Hung D.N.,Research and Engineering Institute
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

The article views the features of enhanced oil recovery to explore what blocking effect the injected water has on formation oil movement in the White Tiger HT fractured basement. The injected water moves faster where the fracture network is better developed, and when the injection rates are higher. At this, some oil - that can be extracted using existing production methods - remains blocked with water in the blocks adjacent to the injection wells temperature-affected areas. Technogenic and geothermal component of the temperature field in the displacement areas has 45-35 °C deltas, according to the well test. When the temperature goes below 115-110 °C, the significant change of reservoir fluids viscosity is observed. The testing established relationship of the oil and water mobility ratios versus degree of the White Tiger basement fractures opening, by dynamic viscosity values.


Ivanov A.N.,Research and Engineering Institute | Mamulina V.D.,Research and Engineering Institute | Dac P.T.,Research and Engineering Institute | Frolova E.V.,Research and Engineering Institute
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

This paper presents the results of the detailed lithological core data investigation within the wireline logs response of the Upper Oligocene formation in the White Rabbit field (Cuu Long basin, Vietnam offshore). The natural gamma ray log distribution and shape had been analyzed in order to determine the lithological cycles of the sedimentation process. Following the results the sedimentology (facial) genetic groups had been evaluated, and the major environments (shale marine and marine) has been established. The petrophysial properties distribution relationship within the geological rock attributes (grain size distribution, diagenetic and post sedimentation processes, clay minerals content) had been investigated in the formation of interest. The data can be used in the advanced geological modeling procedures.


Son P.X.,Research and Engineering Institute | Ivanov A.N.,Research and Engineering Institute | Kholodilov V.Yu.,Research and Engineering Institute | Frolova E.V.,Research and Engineering Institute
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

This paper presents the results of the complex approach application in geological prospecting objectives in common, and in exploration drilling planning in the Vietnam offshore (block 09-1) in particular (as the example). Due to increased interest to non-structural geological traps, the various seismic interpretation and analysis techniques had been introduced, like the advanced seismic attributes, seismic facies analysis. Besides the detailed geological data, like core and wireline data integration is also in the field of interest of the current investigation. As the result, the 3D generation model of the Cuu Long petroleum system had been introduced. So, an integrated approach, detailed analysis and systematization of geological and geophysical data allows to determine the further competent strategy of the geological prospecting objectives and to select the areas of interest for the subsequently exploration drilling. This approach had been hold in 2012-2014 yrs., and was introduced in 2014. As the result, the local structures were found out and successfully drilled with the exploration drilling. A number of these areas led to a great success and significant contribution to the hydrocarbon reserves balance enhancement.


Akhmadeev A.G.,Research and Engineering Institute | Son T.C.,Research and Engineering Institute | Ivanov S.A.,Research and Engineering Institute
Neftyanoe khozyaystvo - Oil Industry | Year: 2015

The article describes complex methods to ensure transportation of the high-paraffin crude oil by the example of Dragon field, located in South Vietnam offshore. The methods include optimization of the oil treatment technology by chemical agents (pour point depressants and de-emulsifiers); implementation of the depressant additives solutions for the more effective impact on oil; rehabilitation of the throughput capacity of pipelines; break of the water-oil emulsions to decrease the viscosity of the transported oil. Example of the non-heat-insulated pipeline RP-1 - FSO-3 explains how implementation of the complex methods leads to the positive results in ensuring safe transportation of the produced product.


Akhmadeev A.G.,Research and Engineering Institute | Avdeev A.S.,Research and Engineering Institute | Laybold S.A.,Research and Engineering Institute | Ivanov S.A.,Research and Engineering Institute
Neftyanoe Khozyaystvo - Oil Industry | Year: 2016

The article describes complex methods to ensure transportation of the highparaffin crude oil by the example of Dragon field, located in South Vietnam offshore. The methods include optimization of the oil treatment technology by chemical agents (pour point depressants and de-emulsifiers); implementation of the depressant additives solutions for the more effective impact on oil; rehabilitation of the throughput capacity of pipelines; break of the wateroil emulsions to decrease the viscosity of the transported oil. Example of the non-heat-insulated pipeline RP-1 - FSO-3 explains how implementation of the complex methods leads to the positive results in ensuring safe transportation of the produced product. © Copyright 2016.


Dang C.T.Q.,University of Calgary | Chen Z.,University of Calgary | Nguyen N.T.B.,University of Calgary | Phung T.H.,Research and Engineering Institute
International Journal of Oil, Gas and Coal Technology | Year: 2015

A great portion of the world's oil reserves is contained in naturally fractured reservoirs (NFRs). As the conventional oil and gas reservoirs have become significantly depleted whereas energy demand sharply increases, the NFRs play an important role in oil exploration and make a large contribution toward oil and gas production worldwide. This paper aims to introduce a historical case study of a successful development plan for a giant fractured granite basement reservoir with a unique geological characterisation. A better geological understanding about the complexity of such a naturally fractured basement reservoir is provided within a simulation strategy in order to optimise successfully its oil exploitation. With our rich experiences in exploration and production of hydrocarbons in fractured basement granite rock for more than 20 years, it is a valuable case study for both current and future development planning of basement reservoirs elsewhere in the world. Copyright © 2015 Inderscience Enterprises Ltd.


Akhmadeev A.G.,Research and Engineering Institute | Son T.C.,Research and Engineering Institute | Vinh P.T.,Research and Engineering Institute
Neftyanoe Khozyaystvo - Oil Industry | Year: 2016

The case of South China Sea offshore fields of Vietsovpetro JV describes methods and approaches to improve rheological properties of the high paraffin crude oil with the use of pour point depressants under offshore production conditions. The system of organizational, technical and process activities is created which allow for an optimal and effective use of chemical agents to prepare the oil for transportation. The system includes control over documents and quality of the incoming chemicals; their effectiveness during lab and field tests, screening tests for chemicals at the stage of lab tests and industrial implementation. The article covers the issues of optimization of the oil treatment technology by depressants-injection into wells to 2000-2500 m through impulse tubes; combined oil treatment with depressants and de-emulsifiers; synergistic effect from implementation of two pour point depressants blend. Reviewed complications which appear during implementation of the pour point depressants oil treatment technology and resolving methods. Covered methods to optimize depressants implementation are seasonal variation of dosage, rejection from injecting the pour point depressants into high water-cut wells, individual dosage of the pour point depressants in each well.


Mokhov S.N.,Research and Engineering Institute | Karapetov R.V.,Research and Engineering Institute
Neftyanoe Khozyaystvo - Oil Industry | Year: 2015

Acid treatment of the production wells bottom hole (BH) is one of the most common oil recovery stimulation methods. Despite of the big experience in the BH treatment jobs and numerous scientific researches in this area, still the considerable part of the BH operations fails to deliver the expected effect. This article shows the improved acid compositions formulation designed for the BH treatment in the clastic intervals of «White Tiger» field; it also describes the lab test carried out to estimate if the acid compositions, after the contact with the formation rocks, can ensure the minimal formation of sediments to avoid the BH clogging.


Bushkovskiy A.L.,Research and Engineering Institute | Ivanov A.N.,Research and Engineering Institute | Thuy L.C.,Research and Engineering Institute
Neftyanoe Khozyaystvo - Oil Industry | Year: 2015

Research of carbon steels of JV Vietsovpetro gas transport and preparation equipment corrosion in conditions of growth of H2S and CO2 content is executed. Gas-phase internal corrosion rate and corrosion damage are insignificant: 0,002-0,05 mmpy and up to 2,57 % of walls thickness (17-19 mm), accordingly due to formation of protective waterproof film with thickness 36-320 mcm on internal surfaces of the equipment. Corrosion of water condensate at absence of oxygen has made 0,0025mmpy Structural and component (EDX) researches, electronic microscopy have shown absence of the latent kinds of corrosion, preservation of phase structure and strength parameters of steel under standard ASTM A106, API 5L at concentration H2S up to 140ppm, pressure up to 12 MPa during operation time 17 years. It is established, that real border of a dangerous zone for H2S is above stipulated by standard NACE MR 0175/ISO 15156. Therefore the basis for corrosion inhibitor's application or H2S absorber should be investigated for revealing real border of danger to real gas composition and technological parameters of its preparation Results of work had allowed to refuse application of gasphase corrosion inhibitor with real economic profit.


Bushkovskiy A.L.,Research and Engineering Institute | Ivanov A.N.,Research and Engineering Institute | Van Vinh C.,Research and Engineering Institute | Thuy L.C.,Research and Engineering Institute
Neftyanoe Khozyaystvo - Oil Industry | Year: 2015

Researches of internal corrosion rate dependence from conditions oil-gas producing, basically in offshore conditions are executed for prolongation of terms of equipment operation and accident precaution owing to internal corrosion. It is established, that in wells production with small water content corrosion rate pipes from steel P-105, P-110 does not exceed 0,007mm/year, but if water content in production is over 55-60 % it increases up to 0,1-0,208 mm/year. Major factors of stress-corrosion in reservoir water are products of acid treatment of wells and dissolved oxygen in technological liquids and pipelines cleaning by sea water washing. Decrease pH and temperature growth lead to growth of corrosion rate. Rate of ulcer corrosion has exceeded 3,8mm/year after saturation of water by oxygen. Growth of on section of a pipe from 0,55 (top) to 0,93mm/year (bottom) is revealed. Reagents reducing corrosion rate are recommended after oilfield tests of 3 types of corrosion inhibitors. Additional internal protection of separators by anodes and anticorrosive epoxy coatings is proposed. The complex of the offered actions has allowed to raise life-time of the offshore oil and gas producing equipment and to exclude accidents.

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