Collaborative methods in enhanced cold heavy oil production

Lines, Larry; Agharbarati, Hossein; Daley, P. F.; Embleton, Joan; Fay, Mathew; Settari, Tony; Vasheghani, Fereidoon; Wang, Tingge; Zhang, Albert; Qi, Xun; Schmitt, Douglas R.

doi:10.1190/1.2978978

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…Both model gathers appear to tie the data well. This suggests that the Gassman fluid substitution is a reasonable approach and is supported by Zhang (2007) and Lines (2008).…”

Section: Dmentioning

confidence: 53%

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The seismic imprint of cold heavy oil production

Hedlin

Chan

2009

SEG Technical Program Expanded Abstracts 2009

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An overview of some of Husky's experience with seismic monitoring of cold heavy oil production (CHOPS) is given. In 2002, models were created to simulate the effect of pore pressure decrease and the resulting exolved gas. These showed a large decrease in acoustic impedance resulting in a large amplitude response. This change in amplitude was observed on wells at the intersection of two 2D seismic lines acquired pre and post production. Next, a 2D-4D experiment showed a good correlation of amplitude changes with cold production. Following that, a 3D experiment was conducted. It highlighted amplitude anomalies that appear to correlate very well with production. A comparison between existing 2D lines and the 3D highlight the changes due to CHOPS.

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“…Both model gathers appear to tie the data well. This suggests that the Gassman fluid substitution is a reasonable approach and is supported by Zhang (2007) and Lines (2008).…”

Section: Dmentioning

confidence: 53%

“…Mayo (1996) noted anomalous seismic amplitudes attributable to CHOPS. Since then, research has been done on the rock physics by Chen et al (2003), Zhang (2007) and Lines et al (2008)and time lapse monitoring (Zou et al 2004). These results suggest that there should be a seismic footprint from CHOPS.…”

Section: Introductionmentioning

confidence: 99%

The seismic imprint of cold heavy oil production

Hedlin

Chan

2009

SEG Technical Program Expanded Abstracts 2009

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“…Heavy‐oil reserves around the world are estimated to be approximately 991.18 billion tons, making up 70% of the remaining global oil reserves, and it is considered the most significant alternative resource 1 . In China, 70% of the total reserves and 50% of the total production in the offshore oil production and development process are heavy‐oil reserves (3.45 billion tons) 2,3 .…”

Section: Introductionmentioning

confidence: 99%

Enhancing heavy‐oil displacement efficiency through viscoelasticity of polymer solution by investigating the viscosity limit of crude oil: An experimental study

Xue,

Zhu,

et al. 2024

Energy Science & Engineering

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The world is rich in ordinary heavy‐oil resources. Exploring the limit of the crude oil viscosity limits can further expand the application of polymer flooding technology in heavy‐oil reservoirs and improve the development efficiency of heavy‐oil reservoirs. On the basis of the polymer flooding that has been implemented in the Bohai offshore oilfield, this study characterized the in situ viscoelasticity of the polymer solution SNF3640C. We compared the polymer flooding and glycerol flooding performance in low‐viscous oil reservoirs (with a viscosity of 6.5 cp) and high‐viscous oil reservoirs (with a viscosity of 65 cp) by conducting microscopic dead‐end experiments and macroscopic core‐flooding experiments, and then analyzing the impact of polymer's viscoelasticity on the oil displacement efficiency of heavy oil. Finally, multiple crude oils with a wide range of viscosity were used to explore the crude oil viscosity limits under which the efficiency of heavy‐oil displacement could be improved through polymer viscoelasticity. The results demonstrate that: (1) the SNF3640C polymer solution can exhibit a certain degree of viscoelasticity in deep formation. At a distance of 140 m from the wellbore in the reservoir, a solution with a concentration of 1500 mg/L can still have a first normal stress difference of 2.5 Pa. Polymers can effectively improve the efficiency of heavy‐oil displacement through elastic action. (2) The viscosity limit that can improve the efficiency of heavy‐oil displacement under current experimental conditions does not exceed 5486 cp. The efficiency of polymer flooding for crude oil has decreased to 31.68%, and the contribution of elastic flooding is only 1.5%. The research method of using viscous glycerol as a comparison to demonstrate the contribution of polymer elasticity to oil displacement effectiveness effectively solves the problem of isolating the contribution by polymer solution's viscosity and elasticity, and clarifies the development direction of polymer flooding for developing heavy crude oil. Enhancing the elastic effect of polymer solution in porous media can increase the viscosity range of polymer flooding heavy oil.

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“…With the large-scale exploitation of conventional oil resources in various countries, heavy oil has attracted much attention because of its huge reserves . Canada, the United States, China, Venezuela, Indonesia, and other countries are all rich in heavy oil resources.…”

Section: Introductionmentioning

confidence: 99%

“…6 With the large-scale exploitation of conventional oil resources in various countries, heavy oil has attracted much attention because of its huge reserves. 7 Canada, the United States, China, Venezuela, Indonesia, and other countries are all rich in heavy oil resources. In recent years, thermal oil recovery technology has gradually been replaced by thermochemical oil recovery technology; the main method is to increase the recovery of heavy oil using surfactants or polymers as oil displacement agents.…”

Section: ■ Introductionmentioning

confidence: 99%

Synthesis and Characterization of a Novel Multibranched Block Polyether Demulsifier by Polymerization

et al. 2021

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Various flooding technologies were applied in the middle and late stages of the oilfield, which made the heavy oil emulsion receive much concern because of its high stability and separation difficulty. In our paper, alcohol molecules were used as initiators and multibranched block copolymers were synthesized through open-loop polymerization technology. A variety of novel modified block polyether demulsifiers with demulsification activity were finally synthesized through water-soluble modification and oil-soluble modification, which achieved efficient demulsification of heavy oil emulsions. Hydrophile–lipophile balance (HLB) values and surface tension were used to characterize demulsifiers. In addition, their demulsification efficiency was evaluated by measuring the amount of dehydration in the separated heavy oil emulsion experiments. The experimental results showed that within 5 h, the demulsification effect of the water-soluble demulsifier is better than that of the oil-soluble demulsifier. When the HLB value of the demulsifier reaches a certain value, the dehydration rate and the demulsification effect reach the highest point. When the amount of demulsifier is 50 μg/g and the demulsification temperature is 85 °C, the dehydration rate of the water-soluble demulsifier X-6 reached 91%, the water quality was clear, and the demulsification effect reached its peak. This work will provide a novel and efficient demulsifier for demulsification and dehydration of heavy oil emulsions.

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Collaborative methods in enhanced cold heavy oil production

Cited by 6 publications

References 5 publications

The seismic imprint of cold heavy oil production

The seismic imprint of cold heavy oil production

Enhancing heavy‐oil displacement efficiency through viscoelasticity of polymer solution by investigating the viscosity limit of crude oil: An experimental study

Synthesis and Characterization of a Novel Multibranched Block Polyether Demulsifier by Polymerization

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