Environmentally Safe Technology to Increase Efficiency of High-Viscosity Oil Production for the Objects with Advanced Water Cut

Palyanitsina, Aleksandra; Safiullina, Elena; Byazrov, Roman; Podoprigora, Dmitriy; Alekseenko, Alexey V.

doi:10.3390/en15030753

Cited by 15 publications

(14 citation statements)

References 34 publications

(33 reference statements)

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“…The series of filtration tests carried out on a small-scale model makes it possible to simulate the growth of water and gas cut/ratio (10%, 30%, 50% water/gas in the flow) at different screen apertures. Filtration was carried out at two drawdown pressures-gradP1 and four times greater gradP2 [30,31]. Summarized data on the amount of suspended particles is presented in Tables 1 and 2 and Figure 8.…”

Section: Resultsmentioning

confidence: 99%

Experimental Evaluation of the Multiphase Flow Effect on Sand Production Process: Prepack Sand Retention Testing Results

et al. 2022

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This paper considers a field with high-viscosity oil in a terrigenous weakly consolidated reservoir (sandstone) with a massive gas cap and an aquifer. The major challenge in the field operation is the migration of solid sand particles into the well, accompanied by a breakthrough of water and/or gas. The goal of the investigation was to evaluate the degree of influence on the sanding process of water and gas shares in the produced fluid and to determine the effect of pressure drop. The research methodology is based on a series of filtration experiments on small-sized bulk reservoir models. Particle size distribution of bulk models was created in accordance with that of the reservoir. The experiments were made in the form of Prepack Sand Retention Tests (SRT). Gas breakthrough allows sand production on a relatively high level for a longer amount of time, even though the concentration of solids in the produced fluid is lower than that of water breakthrough. On the other hand, water breakthrough triggers higher sand production, but it rapidly decreases as time goes on. Retained permeability of the model-screen system from the drawdown pressure (pressure gradient) and phase distribution of the flow were investigated. Moreover, a methodology has been developed for conducting filtration tests on bulk reservoir models to evaluate the efficiency of different screens (wire-wrapped screens, in particular).

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Section: Resultsmentioning

confidence: 99%

Experimental Evaluation of the Multiphase Flow Effect on Sand Production Process: Prepack Sand Retention Testing Results

et al. 2022

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“…Абсолютная проницаемость. Если проницаемость коллектора очень маленькая менее 10 мД, то прокачка полимера будет невозможна, что подтверждается лабораторными исследованиями и гидродинамическим моделированием [5]. Размер молекул полимера ограничит проход состава в поровое пространство, а в призабойной зоне пласта произойдет кольматация, что в дальнейшем может привести к проблемам с приемистостью.…”

Section: критерии эффективного внедрения технологии полимерного завод...unclassified

The current level and prospects for the development of large-volume injection technologies using polymers to increase oil recovery

Podoprigora

Byazrov

Khristich

2022

The Eurasian Scientific Journal

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Currently, there is a worldwide decline in the level of production while maintaining the level of consumption. At the same time, the newly discovered fields are not able to compensate for the volumes of extracted oil, since the volumes of reserves are mainly small or medium. In this regard, it is relevant to introduce technologies to increase oil recovery at already drilled and developed fields. A promising method of increasing oil recovery is polymer flooding, which has many years of successful experience in both Russia and abroad. Polymer flooding technology consists in adding dry polymer to the injected water in concentrations from 0.05 to 0.25 % in order to increase its viscosity, which in turn contributes to improving the flooding process. The polymer rim equalizes the ratio of mobility in the reservoir and allows oil to be uniformly displaced from reservoirs in which there is a heterogeneity in permeability. The key result in the implementation of the technology is an increase in the oil recovery coefficient by improving the coverage of the reservoir by the flooding process, as well as a gradual increase in water availability, without early water breakthroughs from injection to production wells. This technology has wide limits of applicability and has already proven its effectiveness in various geological and physical conditions. This article will consider the physical basis of exposure, the principle of action, the criteria of applicability, the main groups of chemical reagents, and the accumulated domestic and international experience in the design and implementation of polymer flooding technology, development trends and the main difficulties associated with the introduction of this technology.

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“…They are also known to prevent the formation of hydrates that can accumulate around subsea wellheads and x-mas trees, plugging pipelines and interfering with critical operations. High-density brines, such as calcium chloride, calcium bromide, zinc bromide, potassium and cesium formate, can be included in the formulation of low-solids and no-solids systems [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Barite-Free Muds for Drilling-in the Formations with Abnormally High Pressure

Leusheva

Alikhanov

Morenov

2022

Fluids

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This paper discusses problems associated with water-based drilling fluids used for drilling formations with abnormally high pressure. The available solutions are suitable for a narrow range of applications, especially when weighted muds should be used. This paper reviews the experience of searching and developing a new type of drilling mud based on saturated brines. With the referenced papers as the basis, the authors developed compositions of such brine-based drilling muds. A distinctive feature of the considered compositions is the absence of barite, which is often used as a weighting agent. The paper presents a methodology for creating and investigating the proposed drilling fluids. The rheological properties and thermal stability of the muds at various temperatures were studied. The results show that proposed drilling fluids can be efficiently used for drilling formations with abnormally high pressure. It is assumed that the developed muds have greater versatility than analogues.

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Environmentally Safe Technology to Increase Efficiency of High-Viscosity Oil Production for the Objects with Advanced Water Cut

Cited by 15 publications

References 34 publications

Experimental Evaluation of the Multiphase Flow Effect on Sand Production Process: Prepack Sand Retention Testing Results

Experimental Evaluation of the Multiphase Flow Effect on Sand Production Process: Prepack Sand Retention Testing Results

The current level and prospects for the development of large-volume injection technologies using polymers to increase oil recovery

Barite-Free Muds for Drilling-in the Formations with Abnormally High Pressure

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