An integrated evaluation on factors affecting the performance of superheated steam huff and puff in heavy oil reservoirs

Accurate calculation of heat efficiency in the process of superheated steam injection is important for the efficient development of heavy oil reservoirs. In this paper, an integrated analytical model for wellbore heat efficiency, reservoir heat efficiency and total heat efficiency was proposed based on energy conservation principle. Comparisons have been made between the new model results, measured data and Computer Modelling Group (CMG) results for a specific heavy oil reservoir developed by superheated steam injection, and similarity is observed, which verifies the correctness of the new model. After the new model is validated, the effect of injection rate and reservoir thickness on wellbore heat efficiency and reservoir heat efficiency are analyzed. The results show that the wellbore heat efficiency increases with injection time. The larger the injection rate is, the higher the wellbore heat efficiency. However, the reservoir heat efficiency decreases with injection time and the injection rate has little impact on it. The reservoir thickness has no effect on wellbore heat efficiency, but the reservoir heat efficiency and total heat efficiency increase with the reservoir thickness rising.

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New Findings on Heatloss of Superheated Steam Transmitted Along the Wellbore and Heating Enhancement in Heavy Oil Reservoirs

10.2523/iptc-16439-ms ◽

2013 ◽

Author(s):

Xu An Zhu ◽

Mu Longxin ◽

Fan Zifei ◽

Zhao Lun

Keyword(s):

Heavy Oil ◽

Superheated Steam ◽

Oil Reservoirs ◽

New Findings ◽

Heavy Oil Reservoirs

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Thermal Hydraulic Analysis Using GIS on Application of HTR to Thermal Recovery of Heavy Oil Reservoirs

Science and Technology of Nuclear Installations ◽

10.1155/2012/676529 ◽

2012 ◽

Vol 2012 ◽

pp. 1-15

Author(s):

Yangping Zhou ◽

Fu Li ◽

Zhiwei Zhou ◽

Yuanle Ma

Keyword(s):

Heavy Oil ◽

Superheated Steam ◽

Steam Injection ◽

Thermal Recovery ◽

Oil Field ◽

Oil Reservoirs ◽

Hydraulic Analysis ◽

Heavy Oil Reservoirs ◽

Large Water ◽

Thermal Hydraulic Analysis

At present, large water demand and carbon dioxide (CO2) emissions have emerged as challenges of steam injection for oil thermal recovery. This paper proposed a strategy of superheated steam injection by the high-temperature gas-cooled reactor (HTR) for thermal recovery of heavy oil, which has less demand of water and emission of CO2. The paper outlines the problems of conventional steam injection and addresses the advantages of superheated steam injection by HTR from the aspects of technology, economy, and environment. A Geographic Information System (GIS) embedded with a thermal hydraulic analysis function is designed and developed to analyze the strategy, which can make the analysis work more practical and credible. Thermal hydraulic analysis using this GIS is carried out by applying this strategy to a reference heavy oil field. Two kinds of injection are considered and compared: wet steam injection by conventional boilers and superheated steam injection by HTR. The heat loss, pressure drop, and possible phase transformation are calculated and analyzed when the steam flows through the pipeline and well tube and is finally injected into the oil reservoir. The result shows that the superheated steam injection from HTR is applicable and promising for thermal recovery of heavy oil reservoirs.

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Factors Affecting SAGD Performance in Dipped Bed Extra Heavy Oil Reservoirs

10.2118/171050-ms ◽

2014 ◽

Author(s):

Lino Andarcia ◽

Jose Manuel Bermudez ◽

Yorleth Reyes ◽

Hugo Caycedo ◽

Andres Felipe Suarez

Keyword(s):

Heavy Oil ◽

Oil Reservoirs ◽

Factors Affecting ◽

Heavy Oil Reservoirs

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A Study on Effect Evaluating and Parameters Sensitivity Analyzing of Superheated Steam Soak in Heavy Oil Reservoirs

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.3069 ◽

2011 ◽

Vol 239-242 ◽

pp. 3069-3073 ◽

Cited By ~ 1

Author(s):

Qiang Zheng ◽

Hui Qing Liu ◽

Zhan Xi Pang ◽

Fang Li

Keyword(s):

Heavy Oil ◽

Superheated Steam ◽

Oil Production ◽

Steam Injection ◽

Injection Rate ◽

Oil Reservoirs ◽

Saturated Steam ◽

Production Volume ◽

Heavy Oil Reservoirs ◽

Recovery Percentage

By using the technology of numerical reservoir simulation, we have compared superheated steam soak with saturated steam soak in area of heating, effect of distillation, capability of increasing oil production, volume of steam in need to evaluate the effect of superheated steam soak in heavy oil reservoirs. Analyzed the sensitivity of parameters like steam injection intensity, steam injection rate, soak time, degree of superheat to conclude the rule that they affect on recovery percentage. The research shows that, heating radius of superheated steam is greater than that of saturated steam, distillation effect of superheated steam is better than that of saturated steam, oil production of superheated steam is more than that of saturated steam, steam volume in need of superheated steam is less than that of saturated steam. Recovery percentage of superheated steam soak increases but more and more slowly with the increase in steam injection intensity, increases first and then decreases with the increase in steam injection rate, increases first and then decreases with the increase in soak time, increases but more and more slowly with the increase in degree of superheat. Influence of steam injection intensity is obvious to recovery percentage, but influence of other factors like soak time, steam injection rate, degree of superheat is insignificant.

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