Improving downhole pump efficiency and well productivity in heavy oil reservoirs utilizing back pressure regulator

Torabi, Farshid; Jamaloei, Benyamin Yadali; Hong, Sam-Yeol; Bakhsh, Nadeem K.

doi:10.1007/s13202-012-0032-z

Cited by 5 publications

(3 citation statements)

References 3 publications

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“…Therefore, in oilproducing wells, fluid mixtures with an oil volume fraction of $0.80 L/L should be avoided, because the emulsion flow in this region could reduce the efficiency of downhole pump and well productivity. [33] In oil-in-water emulsions flow, the shear stress in small pipes can be predicted fairly well by using the water phase viscosity, due to the significant slippage between the two phases. Consequently, when the fluid mixtures are transported by a small-diameter pipeline, the apparent viscosity can be approximated by the viscosity of the continuous phase.…”

Section: Discussionmentioning

confidence: 99%

“…In the process of phase inversion, the apparent viscosity of the emulsions becomes very large, so that a high pressure drop or a low flow rate can appear in the pipes. Therefore, in oil‐producing wells, fluid mixtures with an oil volume fraction of ∼0.80 L/L should be avoided, because the emulsion flow in this region could reduce the efficiency of downhole pump and well productivity …”

Section: Discussionmentioning

confidence: 99%

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Rheological behaviour of oil and water emulsions and their flow characterization in horizontal pipes

Zhang

2016

Can J Chem Eng

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In this work, the rheological behaviour of oil and water emulsions and their flow characterization were studied using a Haake RS6000 rheometer and a lab scale flow loop. The rheological properties of the synthetic emulsions were investigated at oil volume fractions from 0.1-1.0 L/L and shear rates from 0.001-1000 s À1 at a system temperature of 20 8C. The emulsions flow, formed by the SMV static mixer installed before the test section, was observed in the 2-m long horizontal pipes with 25 and 50 mm inner diameters at different mixture flow rates from 0.01-7.00 m 3 /h. A comparison between rheological measurements and laminar flow data shows that the values of the Sauter mean droplet diameters formed by the SMV static mixer are approximately one order of magnitude bigger than those measured by the rheometer. For oil-in-water emulsions with low oil content, the stress-strain relationships obtained in the rheometer are more suitable for predicting the transport characteristics of the emulsions with a large pipe diameter than those with a small pipe diameter. In addition, the phase inversion points in the pipe flow are closer to those measured at high shear rates in the rheometer. Therefore, the apparent viscosity obtained by the rheology measurements at high shear rates could be introduced for accurate calculations of the mixture Reynolds number and the friction factor in emulsions flow.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Rheological behaviour of oil and water emulsions and their flow characterization in horizontal pipes

Zhang

2016

Can J Chem Eng

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“…The goal is to keep a constant backpressure while collecting sampling fluid at core outlet. BPRs can also be used to enhance the downhole pump performance and well productivity in large oil reservoirs [1]. Role of BPRs in the different core flood experiements is disucsssed in the following paragraphs.…”

Section: Introductionmentioning

confidence: 99%

Oscillating Back Pressure Regulator (OBPR) for High-Pressure Core Flooding

et al. 2023

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The challenge in the core analysis industry is the availability of a versatile back pressure regulator (BPR) that can operate efficiently at ultra-low or no-flow conditions at very high pressure. The existing models of back pressure regulators are limited to a specific range of operating conditions, automation, and robust core flooding environment. In this work, we developed an initial stage prototype of an Oscillating BPR (OBPR), emphasizing detailed instrumentation and implemented automation. The critical component in an OBPR is the valve that needs to operate within defined close and open position based on the feedback received from an encoder rather than the oscillation created by the flow system or by using a square wave oscillator. The paper investigates the static and dynamic characteristics of the newly designed OBPR instrument. The paper discusses the graphical programming LabVIEW software used to create the feedback control loop using the PID controller. Initial results of the test run were done with the different core flooding systems like Water, Brine, and CO2. The study also included comparing OBPR pressure performance with the standard back pressure regulator in the market.

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An improved coupled flow-geomechanical model for cyclic steam stimulation

Benyamin

2023

Petroleum Exploration and Development

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Improving downhole pump efficiency and well productivity in heavy oil reservoirs utilizing back pressure regulator

Cited by 5 publications

References 3 publications

Rheological behaviour of oil and water emulsions and their flow characterization in horizontal pipes

Rheological behaviour of oil and water emulsions and their flow characterization in horizontal pipes

Oscillating Back Pressure Regulator (OBPR) for High-Pressure Core Flooding

An improved coupled flow-geomechanical model for cyclic steam stimulation

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