Revolutionizing Offshore Production by InLine Separation Technology

Fantoft, Rune; Akdim, Mohamed Reda; Mikkelsen, Rene; Abdalla, Tarig; Westra, Remko; Haas, Erica de

doi:10.2118/135492-ms

Cited by 10 publications

(7 citation statements)

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“…In contrast to the separator, the static mixer is used for mixing gas with a liquid such as in the ozonation processes in wastewater treatment as well as scrubbing ammonia, hydrogen chloride, and hydrogen fluoride with water [5]. The use of swirl elements leads to a compact design of inline separators and static mixers which is beneficial in reducing the cost, solving limited space issues (e.g., in existing oil and gas production facilities), and also opens new opportunities, e.g., heavy oil and deep-water subsea applications [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Comparison of Gas–Liquid Flow Characteristics in Geometrically Different Swirl Generating Devices

et al. 2019

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The gas–liquid flow characteristics for blade, single, and the double-helical swirl elements were numerically investigated and compared in this work. The Euler–Euler model assuming bi-modal bubble size distributions was used. The experiment, conducted in a vertical pipe equipped with a static blade swirl element, was used as the basis for the computational fluid dynamics (CFD) simulations. In the experiment, high-resolution gamma-ray computed tomography (HireCT) was used to measure the gas volume fractions at several planes within the blade swirl element. The resulting calculated profiles of the pressure, liquid and gas velocities as well as the gas fraction showed a large influence of the swirl elements’ geometry. The evolution and characteristics of the calculated gas–liquid phase distributions in different measurement planes were found to be unique for each type of swirl element. A single gas core in the center of the pipe was observed from the simulation of the blade element, while multiple cores were observed from the simulations of the single and double helix elements. The cross-sectional gas distribution downstream of the single and double helical elements changed drastically within a relatively short distance downstream of the elements. In contrast, the single gas core downstream of the blade element was more stable.

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Section: Introductionmentioning

confidence: 99%

Comparison of Gas–Liquid Flow Characteristics in Geometrically Different Swirl Generating Devices

et al. 2019

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“…where ε m r represents the measured relative electrical permittivity of the mixture m (water and gas), ε L r represents the relative electrical permittivity of low permittivity media (gas) and ε H r represents the relative electrical permittivity of the high permittivity media (water). i, j, k represent the number of transmitter electrodes (1-2), the number of receiver electrodes (1)(2)(3)(4)(5)(6)(7)(8) and the frame number, respectively.…”

Section: Methodology a Twin-plane Capacitive Sensormentioning

confidence: 99%

“…The search grid containing the possible values for x c , y c and r is defined to have the same range of the (x, y) grid with an optimal step size. In this direction, the targeted parameters are computed by (5). After the parameters x c , y c and r are estimated, we can obtain parameterized 2D and 2.5D (cross section in a time series) images for representing the swirling two-phase flow, which allows visual inspection and qualitative analysis of the results.…”

Section: Experimental Procedures and Data Processingmentioning

confidence: 99%

“…The idea of cyclonic separators can be traced back to a patent in 1940s [4]. This type of separator is able to generate accelerations much higher than the gravity (up to 100g) by swirling the two phases, thus making them suitable for offshore and subsea oil explorations [5]. In the present research, an inline type of cyclonic separator is investigated.…”

Section: Introductionmentioning

confidence: 99%

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Multichannel Capacitive Imaging of Gas Vortex in Swirling Two-Phase Flows Using Parametric Reconstruction

et al. 2020

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Swirl-based inline phase separation is a promising approach in the process industry with potential application in oil and gas separation in petroleum industry. To increase the efficiency of the separation, the process may be controlled. In this direction, the position and the diameter of the gas vortex are two parameters that can be used in the control loop, provided that they can be non-intrusively estimated. This article presents a capacitive sensor-based imaging method to extract these geometrical parameters. The proposed method consists in obtaining high-temporal resolution capacitance measurements at the pipe boundary of a test rig, which in turn are used in a reconstruction and extracting the targeted parameters of the gas vortex. The calculated parameters are then used to visually present the swirling flow. The measurement system was evaluated quantitatively by performing experiments with different phantoms of known diameters and positions in the sensing area. Dynamic measurements were also performed in a test rig for liquid-gas swirling flow. The capacitive imaging system is capable of detecting characteristics of the flow for a wide range of gas and liquid flow rates. A qualitative analysis was also carried out by comparing time series of the capacitive images with high-speed camera recording. The geometrical parameters obtained by the proposed approach presents a good agreement with the real data, with a root mean square deviation of 0.76mm for diameter and 0.88mm for vortex position. It can be utilized in future work as an alternative or complementary input for the controlled inline liquid-gas separation system. INDEX TERMS Swirling two-phase flows, capacitive sensor, grid search, parameter extraction.

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“…Devices such as the Pipe Separator [30], Inline Water Separation (IWS) system [31], the Inline PhaseSplitter [33], and Caltec's Water Extraction (Wx) technology have all been developed with the idea to utilize forward flow momentum to effect separation through internal geometry. Each of these technologies has the potential to improve the handling of higher water cut, but each has a unique operating envelope which must be understood for optimal selection and success.…”

Section: Corrosion and Integrity Managementmentioning

confidence: 99%

Extending the Life of Mature Assets: How Integrating Subsurface & Surface Knowledge and Best Practices Can Increase Production and Maintain Integrity

Khatib¹,

Walsh²

2014

All Days

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Many producing assets in the world have reached the so-called mature phase of development. Some of these assets have been producing for 30 to 40 years or more, which is typically beyond the design life, and have reached a water to oil ratio of 3 to 9 or more. There are many issues that affect the productivity and economic viability of these fields. Some of the challenges include integrity uncertainty in the wells, flow lines, and facilities; production bottlenecks due to the shift in gas, oil and water ratios; erosion/ corrosion; increased sand production and handling costs; high chemical consumption and treatment costs; and obsolete monitoring and control systems that are incompatible with new technologies and which contribute to the need for a large number of operations staff. Generally operators are faced with the commercial decision whether to sell the asset to a low cost operator, reinvest in the asset, or incur the cost of decommissioning.While the number and complexity of these challenges are significant, there are nevertheless a number of viable options for extending the economic life of such assets. Hydrocarbon recovery and production from these fields can be enhanced by infill drilling; acid and fracture stimulation; by implementing a range of remediation techniques such as recompletion with smart systems to reduce water and solids influx to surface facilities; and by the implementation of improved and enhanced recovery methods. Selecting the optimal strategy requires a holistic perspective on subsurface issues, wells, and surface facilities, and an ability to make projections of integrated performance. This is greatly facilitated by first developing a root cause understanding of the reservoir and production fluid characteristics, and second, the use of analysis tools that allow quick and reasonably accurate assessment of options.In order to increase value from matured fields, the goal is to increase oil recovery from the historical average of 35% and to optimize production by improving the operational efficiency. To achieve this goal, in this paper we will put forward two key imperatives that extend the life of a mature field: (1) Finding and accessing the by-passed oil and (2) Maintaining High uptime during Asset production and operation.In this paper, several mature fields in Europe, Far East and Middle East are analyzed and presented in order to: -highlight the root causes for either low production and or higher operating costs; -assess the impact of both surface and subsurface uncertainties in multiple development planning scenarios; -develop the best strategies and options for improved reservoir, well and facilities management; -demonstrate the contributions of implemented new technologies that optimized performance of artificial lift, minimized downtime by well intervention and reduced operational costs by fluids flow assurance in well and surface facilities; and -list the technical and economical challenges that still face the industry.

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Revolutionizing Offshore Production by InLine Separation Technology

Cited by 10 publications

References 1 publication

Comparison of Gas–Liquid Flow Characteristics in Geometrically Different Swirl Generating Devices

Comparison of Gas–Liquid Flow Characteristics in Geometrically Different Swirl Generating Devices

Multichannel Capacitive Imaging of Gas Vortex in Swirling Two-Phase Flows Using Parametric Reconstruction

Extending the Life of Mature Assets: How Integrating Subsurface & Surface Knowledge and Best Practices Can Increase Production and Maintain Integrity

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