Research on viscosity-reduction technology by electric heating and blending light oil in ultra-deep heavy oil wells

Zhu, Mingshan; Zhong, Haiquan; Li, Yingchuan; Cheng, Zhihui; Gao, Yue Hong

doi:10.1007/s13202-014-0126-x

Cited by 11 publications

(7 citation statements)

References 2 publications

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“…This method is commonly adopted worldwide by the petroleum industry as it facilitates the process of reducing the viscosity of heavy oil for its pipeline transportation at a reasonable expense. [22,62,63] Most importantly, the risk associated with pumping diluted oil is minimum compared to the other technologies applicable for similar transportation.…”

Section: Dilution Of Heavy Crudesmentioning

confidence: 99%

Applications of drag reducers for the pipeline transportation of heavy crude oils: A critical review and future research directions

et al. 2023

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The long‐distance pipeline transportation of heavy crudes demands optimal pumping procedures to abate overhead expenditures in the midstream phase. This can be facilitated by reducing both the oil viscosity and the frictional losses induced by the turbulent flow zone. The dualistic approach of reducing both viscosity and drag requires the optimization of several parameters such as concentrations and types of diluents and additives. This manuscript critically reviews various technologies being undertaken to facilitate the pipeline transportation of heavy crude oils by highlighting the technique of dilution coupled with the addition of drag reducing agents (DRA). DRA such as surfactants, nanoparticles, bio‐additives, polymers, and fibres are blended with the diluted crudes to suppress the proliferation of turbulent eddies which in turn assist in pumping the oil at a higher flow rate under constant pressure conditions. Several investigations have reported that drag reduction is significantly enhanced by varying the molecular structure of the DRA. In addition, an optimum flow rate coupled with a specific surfactant concentration at an ideal temperature can significantly reduce head losses and pumping expenditures. Further research is imperative to study the effect of the polymer structure with respect to the induced shear degradation and dissolution behavior of the crude.

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Section: Dilution Of Heavy Crudesmentioning

confidence: 99%

Applications of drag reducers for the pipeline transportation of heavy crude oils: A critical review and future research directions

et al. 2023

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“…Moreover, heavy oil blending with light oil has a good viscosity reduction effect and is a mature technology and widely used in heavy oil production. , For adjusting the light oil blending process, the preferred light oil type, dilution ratio, and delivery temperature need to be based on the viscosity of the mixing oil. The measured viscosity has a higher reliability than the calculated value, but the experimental workload is large.…”

Section: Introductionmentioning

confidence: 99%

Determination of the Transportation Limits of Heavy Crude Oil Using Three Combined Methods of Heating, Water Blending, and Dilution

et al. 2020

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Conventional methods for pipeline transportation of heavy or extraheavy crude oils adopt heating, water blending, and dilution, and several methods are generally required to be used simultaneously to ensure normal transportation. However, how to determine the optimal transport boundary conditions for heavy oils is still one of the technical challenges. In this paper, the circulating piping experiment at different water contents (0−90 wt % with an interval of 10 wt %) and temperatures (65−90 °C with an interval of 5 °C) of three heavy oils from the Xinjiang oilfield is carried out. The apparent viscosity calculated from the experimental data of the circulating pipeline shows that when the water content is below the phase inversion point, the apparent viscosity increases and when the water content is close to the phase inversion point, the apparent viscosity increases nearly three times. Only when the water content is greater than the phase inversion point, the apparent viscosity shows a downward trend. Also, then, various viscosity prediction models with different independent variables, which mainly included temperature, water content, and dilution ratio, are selected and verified. Based on experimental data of six crude oils, a prediction model of the phase inversion point is established. Simultaneously, a method for determining the boundary conditions of heavy oils using the combined methods of heating, water blending, and dilution is proposed, while a set of simple decision diagrams of boundary conditions for heavy oil is also described. Finally, verified by the heavy oil pipeline of the Bohai LvDa oilfield, the gathering and transportation limits determined by this method are consistent with the operating parameters of the oilfield.

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“…Hence, the light oil which easy to be produced has been already extracted [1]- [3]. Heavy oil reserve is 70% of total world oil reserves [4], but the issue is faced with heavy oil reserve is a high viscosity and density due to higher asphalt and sulfur components than conventional oil [5]. Therefore, it becomes a challenge to produce crude oil from the reservoir both technically or economically [6].…”

Section: Introductionmentioning

confidence: 99%

Electrical Heating for Heavy Oil: Past, Current, and Future Prospect

Hasibuan¹,

Regina²,

Wahyu³

et al. 2020

Preprint

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This paper presents a review of the electrical heating method for heavy oil recovery based on past, current, and future prospects of electrical heating. Heavy oil is one of the potential crude oil used as a link to reduce the crisis of light oil used today. The obstacle of heavy oil is a high viscosity and density in which thermal injection is a method for heavy oil recovery, but it results in economic and environmental issues. Electrical heating is one of the thermal methods by transferring heat into the reservoir. The basic process of electrical heating is to increase the mobility of the oil. Because the temperature rises, it can reduce oil viscosity and makes it easier for heavy oil to flow. The past and current developments have been carried out to fill up the gap of electrical heating projects. The future prospects must meet energy efficiency, and the excessive heat will damage formation that must be tackled in the future prospect. the works adopt several electrical heating projects and applications in the world where the works give a brief future prospect of electrical heating.

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Research on viscosity-reduction technology by electric heating and blending light oil in ultra-deep heavy oil wells

Cited by 11 publications

References 2 publications

Applications of drag reducers for the pipeline transportation of heavy crude oils: A critical review and future research directions

Applications of drag reducers for the pipeline transportation of heavy crude oils: A critical review and future research directions

Determination of the Transportation Limits of Heavy Crude Oil Using Three Combined Methods of Heating, Water Blending, and Dilution

Electrical Heating for Heavy Oil: Past, Current, and Future Prospect

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