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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.

Nguyen T.B.N.,Sejong University | Bae W.,Sejong University | Nguyen L.A.,Research and Engineering Institute | Dang T.Q.C.,University of Calgary
Petroleum Science and Technology | Year: 2014

This paper presents the procedure and results of building porosity and permeability models for a fractured basement reservoir in offshore Vietnam by using Artificial Neural Network (ANN) method. ANN may help solve problems that conventional computing has not been successful with. Thus, ANN is a method, which could provide an accurate model for fractured basement reservoirs. Moreover, well log data combine seismic attributes to establish the property model. Well log data were used as the indicator to test the accuracy of the models. This study shows the 3D models of porosity and the permeability models. © 2014 Taylor & Francis Group, LLC.

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.

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.

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.

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