A Downhole Wireline Module for the Measurement of Bubble Point Pressure

Rashaid, M.; Harrison, Christopher; Ayyad, Hazim; Dumont, Hadrien; Smythe, Elizabeth J.; Sullivan, Matthew; Meier, J. H.; Fukagawa, Shunsuke; Miyashita, Masaki; Grant, Bill; Morikami, Yoko; Kajikawa, Yohei; Maekawa, Yuichi; Tsuboi, Hidenori

doi:10.2118/197927-ms

Cited by 5 publications

(5 citation statements)

References 14 publications

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“…This newly developed system has been verified to provide accurate thermodynamic bubblepoint pressure measurement with no greater than 25 psi (0.17 MPa) discrepancy compared to that obtained from conventional surface laboratory analysis. 12 Validation of this technique with the literature values for carbon dioxide has been previously reported. 11 This system has been demonstrated and validated during field trials downhole in several oilfields.…”

Section: Introductionmentioning

confidence: 79%

“…We have recently published results confirming that live crude oils, in spite of contamination by mud filtrate and debris, can display a similarly large degree of supersaturation. 10,12 Hence the supersaturation shown here should be taken as intrinsic to the system consisting of the oil and the confining metal vessel, with the latter being necessary for high-pressure measurements. 4.6.…”

Section: Discussionmentioning

confidence: 99%

“…11 This system has been demonstrated and validated during field trials downhole in several oilfields. 10,12 Due to the effectiveness of the thermal pulse, measurements of a bubblepoint pressure do not need to wait for sample equilibration and take only minutes to perform.…”

Section: Introductionmentioning

confidence: 99%

“…To overcome this challenge, a nonmechanical thermal nucleation method that uses a millijoule heat pulse delivered by a thin wire has been developed and is used as a reference in this article. − The measurement system, consisting of a highly accurate low-volume pressure gauge and a thermally pulsed optical cell, is based on the combined technologies of microelectromechanical systems (MEMS) and the innovations found in medical devices used for minimally invasive surgery. This newly developed system has been verified to provide accurate thermodynamic bubblepoint pressure measurement with no greater than 25 psi (0.17 MPa) discrepancy compared to that obtained from conventional surface laboratory analysis . Validation of this technique with the literature values for carbon dioxide has been previously reported .…”

Section: Introductionmentioning

confidence: 99%

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Supersaturation in a Wide Range of Recombined Oils

et al. 2020

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We have studied the limits of supersaturation in binary alkane mixtures and recombined crude oils at elevated pressures. Our study has interrogated these fluids using an optical cell with an internal volume of approximately 1 μL that includes a thermally pulsed wire which nucleates bubbles to "break" supersaturation, thereby acting as a reference. In parallel, we have made measurements in a larger and more conventional optical cell with an internal volume closer to 1 mL absent the aid of a nucleation device. For both, we demonstrate a maximum supersaturation of approximately 800 psi for conventional black oils. In contrast, supersaturation is demonstrated to be minimal for volatile oils. We show that the higher surface tension of conventional black oils favors surface-mediated nucleation, while the lower surface tension of volatile oils gives rise to nucleation that primarily takes place in the bulk. Among the surfaces studied, optically smooth high-pressure windows that permit observation of the nucleation process show the lowest tendency to nucleate bubbles.

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Section: Introductionmentioning

confidence: 79%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Supersaturation in a Wide Range of Recombined Oils

et al. 2020

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“…Several client-endorsed papers have already been published in various trade journals detailing the use of the MRPV for sample quality validation. ,, Here, we review several field examples which illustrate the utility of this technology to characterize and qualify sampled fluid in real time.…”

Section: Use Of Phase Transitions As Quality Indicators and For Fluid...mentioning

confidence: 99%

Development of a Downhole Measurement System for Phase Behavior of Reservoir Crude Oils and Retrograde Condensates

et al. 2022

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This article reviews the scientific findings that were integrated into a downhole prototype to measure hydrocarbon phase behavior. While laboratory measurements of bubble point pressure (P b ), asphaltene onset pressure (AOP), and dewpoint pressure (P d ) are well established and have been extensively studied, such measurements of reservoir crude oils are novel downhole due to their operational, hydraulic, and interpretational complexities. Furthermore, such laboratory measurements typically take several hours to complete and can only be carried out by skilled personnel. For the downhole measurement, novel science and understanding were developed to reduce the measurement time to minutes and to automate the workflow. This article reviews the science and technology that enabled these downhole measurements to be made rapidly and provides field examples of how sampling is optimized and quality is validated in real time.

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A Fast Measurement of Asphaltene Onset Pressure

Sullivan

Smythe

Fukagawa

et al. 2020

SPE Reservoir Evaluation &Amp; Engineering

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Summary A technique to quickly determine the asphaltene onset pressure (AOP) of a crude oil from low-volume, nonequilibrium measurements is presented. The pressure at which the optical signature indicative of asphaltene aggregation is first detected in recombined crude oils is found to decrease strongly with the rate of depressurization and can be well-described with a modified power law. This technique exploits this rate dependence and uses two separate decompressions at highly disparate depressurization rates to determine the AOP. Benchmarking with this technique was performed with recombined crude oils that were characterized with conventional pressure/volume/temperature analysis. Using this technique, measurements enabling the determination of the AOP of a live crude oil can be obtained in minutes with a nominal uncertainty of 500 psi. This is a significant reduction in time compared with the multihour process used for conventional equilibrium-based measurements. Onset-time data from these studies are consistent with conventional aggregation theories, but there is insufficient range to differentiate between reaction-limited aggregation (RLA) and diffusion-limited aggregation (DLA).

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A Downhole Wireline Module for the Measurement of Bubble Point Pressure

Cited by 5 publications

References 14 publications

Supersaturation in a Wide Range of Recombined Oils

Supersaturation in a Wide Range of Recombined Oils

Development of a Downhole Measurement System for Phase Behavior of Reservoir Crude Oils and Retrograde Condensates

A Fast Measurement of Asphaltene Onset Pressure

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