Dually Prewetted Underwater Superoleophobic and under Oil Superhydrophobic Fabric for Successive Separation of Light Oil/Water/Heavy Oil Three-Phase Mixtures

2017 ◽  
Vol 9 (41) ◽  
pp. 36368-36376 ◽  
Author(s):  
Guoliang Cao ◽  
Wenbo Zhang ◽  
Zhen Jia ◽  
Feng Liu ◽  
Haiyue Yang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Three Phase ◽  
Light Oil ◽  
Oil Water

Experimental Investigation of Liquid Carry-Over in GLCC© Separators for 3-Phase Flow

2016 ◽  
Author(s):  
Srinivas Swaroop Kolla ◽  
Ram S. Mohan ◽  
Ovadia Shoham
Keyword(s):  
Heavy Oil ◽  
Phase Flow ◽  
Level Control ◽  
Three Phase ◽  
Three Phase Flow ◽  
Light Oil ◽  
Series Of Experiments ◽  
Oil Water ◽  
Carry Over ◽  
Operational Envelope

Prediction of the Operational Envelope (OPEN) for liquid carry-over is essential for optimized performance of Gas-Liquid Cylindrical Cyclone (GLCC©1) compact separators. This study extends the previous GLCC liquid carry-over studies from 2-phase flow to 3-phase gas-oil-water flow incorporating pressure and level control configurations. A series of experiments were conducted to evaluate the performance of a 3″ diameter GLCC in terms of OPEN for liquid carry-over. Both light oil and heavy oil were utilized, with watercuts ranging from 0 to 100%. The liquid level was controlled at 6″ below the GLCC inlet. A significant effect of watercut on the OPEN for liquid carry-over for three-phase flow was observed. As the watercut reduces, the OPEN for liquid carry-over reduces too. Also, the OPEN for heavy oil reduces as compared to light oil, which could be primary due to the effect of viscosity. Finally, the annular mist velocity increases with the increment of watercut and viscosity.

Design and preparation of mixed special wettability fabrics based on backed weave for separation of light oil/water/heavy oil mixtures

2020 ◽  
pp. 152808371990093
Author(s):  
Meiyin Luo ◽  
Chengjian Yao ◽  
Shixiong Zhai ◽  
Kaili Jin ◽  
XiQin Huang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Light Oil ◽  
Oil Mixtures ◽  
Oil Water

A Study on the Effect of Fluid Properties and Watercut on Liquid Carry-Over in Gas-Liquid Cylindrical Cyclone Compact Separators

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Srinivas Swaroop Kolla ◽  
Ram S. Mohan ◽  
Ovadia Shoham
Keyword(s):  
Heavy Oil ◽  
Limited Range ◽  
Level Control ◽  
Mineral Oils ◽  
Three Phase ◽  
Cylindrical Cyclone ◽  
Light Oil ◽  
Carry Over ◽  
Superficial Gas Velocity ◽  
Operational Envelope

Prediction of the operational envelope (OE-limited range of gas and liquid velocities) for liquid carry-over is essential for the optimized performance of gas-liquid cylindrical cyclone (GLCC©) compact separators. This study presents for the first time the operational envelop for three-phase gas-oil-water flow incorporating pressure and level control configurations. A series of experiments were conducted to evaluate the performance of a 3 in. diameter GLCC in terms of OE for liquid carry-over. Experiments were carried out at different watercuts ranging from 0% to 100% utilizing water and two different types of mineral oils namely: light oil and heavy oil with specific gravities of 0.859 and 0.937, respectively. The liquid level was controlled at 6 in. below the GLCC inlet for all the experimental flow conditions. The experimental results indicate that OE for liquid carry-over for three-phase flow is very sensitive to watercut. As the watercut reduces, the OE for liquid carry-over reduces monotonically. Also, the OE for heavy oil (indicated by higher viscosity) reduces as compared to light oil. The superficial gas velocity required to create an annular mist flow in the upper part of the GLCC increases with the increase of watercut and viscosity.

An anti-overturn Janus sponge with excellent floating stability for simultaneous pollutant remediation and oil/water separation

2018 ◽  
Vol 6 (34) ◽  
pp. 16371-16381 ◽  
Author(s):  
Yo Seph Lee ◽  
Byung Kwon Kaang ◽  
Nara Han ◽  
Ha-Jin Lee ◽  
Won San Choi
Keyword(s):  
Heavy Oil ◽  
Water Separation ◽  
Pollutant Remediation ◽  
Light Oil ◽  
Oil Water Separation ◽  
Oil Water ◽  
Strong Winds ◽  
Harsh Conditions

This paper reports an anti-overturn Janus sponge that can absorb oil under harsh conditions such as high waves and strong winds, remediate pollutants in three liquid multiphases, and successively separate and remediate three liquid layers (light oil/water/heavy oil).

Recovery of Heavy Oil From the Monterey Formation in Offshore California by Cyclic Injection of Light-Oil Diluent

2001 ◽  
Vol 4 (01) ◽  
pp. 51-58
Author(s):  
R.L. Garnett
Keyword(s):  
Oil Recovery ◽  
Heavy Oil ◽  
Viscosity Ratio ◽  
Oil Viscosity ◽  
Production Rates ◽  
Monterey Formation ◽  
Light Oil ◽  
Water Viscosity ◽  
Oil Water

Summary This paper describes a single-well pilot in which light-oil diluent was injected through tubing to lower in-situ oil viscosity and increase production from a low-gravity oil well. The pilot well is located on the Heritage platform in the Santa Ynez Unit and produces from the Monterey formation. The pilot validated laboratory data suggesting that large production-rate increases could result from high-rate diluent injection. Introduction The Monterey formation is a complex reservoir with intense structuring, fracturing, and highly variable rock properties. It is a dual-porosity system, with low-permeability matrix rock and extensive fracturing. The fractures provide the flow path to the wells and are well-connected to a very large aquifer. The fluid system is equally complex. The original oil column was 2,000 ft thick, and the oil gravity varied from 5 to 19°API. Gravity/depth relationships vary within the field area. Heavy oil, as defined in this paper, is oil with dead-oil gravities of approximately 11°API or less. Fig. 1 is a geothermal temperature-gradient curve for offshore California. Fig. 2 is an estimation of live-oil viscosities for Monterey crude as a function of temperature and dead-oil gravity. Recovering the heavier oil at economic rates without producing large volumes of water is a challenge owing to a strong aquifer, highly permeable fractures, and a poor oil/water viscosity ratio. Achieving the large drawdown required to produce heavy oil at the high rates needed for economic operations offshore can result in the oil being bypassed by water flowing through the fractures. Even if bypassing can be avoided, the flow rate of heavy oil to the wellbore can be low. Furthermore, cooling of the heavy oil as it reaches the seafloor results in additional producing problems. As seen in Fig. 2, a 10°API oil has an in-situ viscosity of 100 cp at 200°F. As the heavy oil flows to the surface and cools, viscosity can rise above 10,000 cp and cause severe lifting problems. Deep, long throw wells (6,000 to 10,000 ft subsea), an offshore operating environment, a fracture zone with an active aquifer, and low heavy-oil prices rule out most methods of heavy-oil recovery. The challenge is to find a low-cost method to lower the oil viscosity in both the near-well region and the tubing. This paper documents a simple and inexpensive way to lower viscosity by an order of magnitude or more through cyclic injection of light oil. Theory Darcy's Law for radial, steady-state flow describes fluid flow in porous media. This simple equation gives guidance and insight to solve many oil-production problems:Equation 1 This pilot focused on reducing viscosity (µo) as a method to increase production rate (q). While the other components are also important, they were less critical for the following reasons:Fracture permeability in the major producing intervals of the Monterey formation in the Santa Barbara Channel is excellent. Wells have produced at rates in excess of 9,000 STB/D from as little as 40 ft true vertical depth (TVD) of the perforated interval. Average permeabilities are in the multidarcy range.High drawdowns may be harmful in the long run because of an unfavorable oil/water viscosity ratio. High drawdowns can result in water coning and fingering through the fractures, leaving bypassed oil in the formation. In addition, alternative lifting methods to increase drawdown can be costly owing to long throws and deep completions in the offshore environment. Reducing in-situ oil viscosity can improve the oil/water viscosity ratio, reduce water coning and fingering, reduce water cut, reduce lifting problems, and increase production rates and oil recovery from fractured heavy-oil reservoirs. HE-26 Pilot Background. The Heritage platform began producing from the Pescado field in the Santa Ynez Unit in December 1993. Wells produce 10 to 17°API oil from the Monterey and 34°API oil from sandstone formations. The Monterey formation consists of thin beds of porcelanite, chert, calcite, dolomite, and shale. The beds are highly fractured and well-connected both areally and vertically by an extensive fracture network. The fractures provide the primary flow paths in the reservoir and result in well rates as high as 10,000 STB/D. Formation pressure is supported by re-injection of produced gas and by a large, well-connected aquifer. The original oil column was approximately 2,000 ft thick and contained undersaturated oil with gravities grading from 19°API at the crest of the structure to 5°API at the original oil/water contact. Wells either flow naturally or are produced by high-volume gas lift. The sandstone formations lie below the Monterey and contain light oil with an associated gas cap. Sandstone wells flow naturally without the need for artificial lift. HE-26 History. The HE-26 well was drilled and completed in July 1997 in the Monterey formation, with perforations at 6,956 to 6,997 and 7,416 to 7,437 ft subsea. The well was stimulated with a combination of xylene, HCL, and mud acid, using foam and ball sealers for diversion. After stimulation, the well produced approximately 100 STB/D of 10.2°API oil and water. These perforations were isolated with a through-tubing bridge plug, and the well was reworked higher to 6,751 to 6,801 ft subsea. The new perforations were stimulated in a similar fashion. Oil gravity increased slightly, but production rates were unchanged. The interval was isolated with another through-tubing bridge. A final interval was perforated at 6,667 to 6,702 ft subsea. Oil gravity was slightly higher (11.4°API), but oil production rates once again did not change.

Modeling of three-phase heavy oil–water–gas bubbly flow in upward vertical pipes

2010 ◽  
Vol 36 (6) ◽  
pp. 439-448 ◽  
Author(s):  
O. Cazarez ◽  
D. Montoya ◽  
A.G. Vital ◽  
A.C. Bannwart
Keyword(s):  
Heavy Oil ◽  
Bubbly Flow ◽  
Three Phase ◽  
Oil Water ◽  
Water Gas

Determination of Two-Phase and Three-Phase Relative Permeabilities in Heavy Oil/Water/Gas Systems

2015 ◽  
Author(s):  
J. Modaresghazani ◽  
R. G. Moore ◽  
S. A. Mehta ◽  
K. C. Van Fraassen
Keyword(s):  
Heavy Oil ◽  
Relative Permeabilities ◽  
Two Phase ◽  
Three Phase ◽  
Oil Water ◽  
Water Gas

scholarly journals pH-RESPONSIVE WOOD SLICES FOR THE CONTINUOUS SEPARATION OF LIGHT OIL/WATER/HEAVY OIL TRIPHASE MIXTURES

Química Nova ◽  
2021 ◽  
Author(s):  
Yanbiao Zhou ◽  
Kaige Qua ◽  
Lihui Zhang ◽  
Ming La
Keyword(s):  
Heavy Oil ◽  
Industrial Wastewater ◽  
Separation Efficiency ◽  
Treated Wood ◽  
Continuous Separation ◽  
Balsa Wood ◽  
Ph Responsibility ◽  
Light Oil ◽  
Oil Water ◽  
Blade Cutting

Light oil/water/heavy oil triphase mixtures are common in industrial wastewater, while nearly all separation materials with superwettability can only separate biphase mixtures of light oil/water or/and heavy oil/water. Here, a balsa wood slice with superhydrophilic/superoleophilic property in air was fabricated by a blade-cutting and ethanol-treating process. Therefore, the slice could be dually prewetted with both water and oil and thus showed underwater superoleophobic and underoil superhydrophobic properties without any further chemical modification. Such a slice showed underoil superhydrophobicity in nonbasic environment while transition into underoil superhydrophilicity under basic condition. Combining with the porous structure possessed by wood designed to transport liquids, this superwettability of the treated wood slice could be leveraged in the continuous separation of light oil/water/heavy oil triphase mixtures only driven by gravity with a high permeation flux and separation efficiency. After each separation, the slice was easily recovered by washing with acidic solution, and it could be recycled up to 15 times without any loss of pH responsibility. During repeated cycling separation, the slice exhibited excellent separation stability.

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