Modeling of lifting heavy oil assisted by enclosed thermal fluid circulation in hollow rod

Li, Songyan; Li, Zhaomin; Li, Binfei; Lin, Rui‐Biao

doi:10.1016/j.petrol.2010.11.001

Cited by 3 publications

(2 citation statements)

References 19 publications

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“…As a result, the heavy oil is produced to surface in the form of stable W/O emulsion in thermal recovery processes such as steam injection [1][2][3]. The emulsification of heavy oil and water usually results in difficulty of water separation and failure of the dewatering equipment on the oil production platform in an offshore oilfield [4][5][6][7]. Therefore, the principles and impact factors on the stability of W/O emulsion during steam injection processes are significantly important for the evaluation of heavy oil mobility and treatment of produced fluids at the surface.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Interfacial Properties on the Stability of Water in Heavy Oil Emulsions in Thermal Recovery Process

Sun

2020

Geofluids

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Under the conditions of thermal oil recovery, the heavy oil in a reservoir usually exists in the form of W/O emulsion with high water content, which has significant effect on oil recovery performance. The most important parameter on the stability of W/O emulsion is interfacial properties. Thus, in order to investigate the effect of interfacial properties on the stability of W/O emulsion in a heavy oil reservoir at elevated temperatures, experiments have been conducted to generate various emulsions with variations in the temperature; stirring rate; contents of asphaltene, resin, and wax of the simulated heavy oil; and water salinity based on a target heavy oil reservoir in China. Then, the properties of the W/O emulsions include viscosity, interfacial viscosity (IFV), interfacial tension (IFT), and dehydration rate; the microscopic morphologies are measured as well. The experimental results show evidently stable W/O emulsion of heavy oil and water generated in thermal processes due to the stable, thick, and indistinct interface between heavy oil and water, where the active molecules of asphaltene and resin are accumulated. The interface connects the central large droplet and the surrounding small droplets tightly. The results also indicate the size of the central droplet, and the indistinct interface can be enlarged with increasing temperature and increasing stirring rate. Compared to resin, it is noted that the larger asphaltene molecules have stronger connection because of their stronger intermolecular force, larger IFV, and less IFT. At the same time, the stability of W/O emulsion will be strengthened with increasing temperature and stirring rate and gradually weakened with increasing salinity. In conclusion, the stability of water in heavy oil emulsion is mainly related to the large interfacial viscosity of the interface with much more heavy components such as asphaltene and resin compared to thin oil.

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Section: Introductionmentioning

confidence: 99%

Influence of the Interfacial Properties on the Stability of Water in Heavy Oil Emulsions in Thermal Recovery Process

Sun

2020

Geofluids

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“…Due to the influence of crude oil viscosity, during the production process, when the oil pump goes up, the traveling valve closes slowly, while the fixed valve opens slowly. When the oil pump goes down, the traveling valve opens slowly, and the fixed valve closes slowly, reducing the pump's filling coefficient and reducing pump efficiency [12][13][14][15] .…”

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confidence: 99%

Research and Practice of Heavy Oil Hydraulic Pump Lifting Technology in Bohai Bay K Oilfield

Zhang,

Shao,

Zhu

et al. 2023

J. Phys.: Conf. Ser.

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In the early stage of heavy oil reservoir development in Bohai Bay K Oilfield, crude oil viscosity is high, conventional lifting processes have poor adaptability, and production energy consumption is high; Entering the stage of ultra-high water cut development, the company implemented carbon dioxide huff and puff, the difficulties in lifting matching brought about by the integrated wellbore requirements of injection and production, high gas-liquid ratio lifting, and enhanced corrosivity of the produced fluid. It conducted research on concentric dual/single pipe hydraulic lifting technology for heavy oil reservoirs, and conducted field practice. The research results and field practice show that the hydraulic pump lifting technology has good adaptability for both heavy oil sand production wells and heavy oil carbon dioxide huff and puff wells, effectively reducing the energy consumption of heavy oil lifting, significantly extending the pump inspection cycle of heavy oil sand production wells, significantly improving the lifting adaptability of carbon dioxide huff and puff wells, and has high promotion value in similar reservoirs and single wells.

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Heating of heavy oil by circulating hot water in closed double casing in ultra-deep wells

Lin

Wang

2012

Pet. Sci.

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Modeling of lifting heavy oil assisted by enclosed thermal fluid circulation in hollow rod

Cited by 3 publications

References 19 publications

Influence of the Interfacial Properties on the Stability of Water in Heavy Oil Emulsions in Thermal Recovery Process

Influence of the Interfacial Properties on the Stability of Water in Heavy Oil Emulsions in Thermal Recovery Process

Research and Practice of Heavy Oil Hydraulic Pump Lifting Technology in Bohai Bay K Oilfield

Heating of heavy oil by circulating hot water in closed double casing in ultra-deep wells

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