Steam injection for heavy oil recovery: Modeling of wellbore heat efficiency and analysis of steam injection performance

Gu, Haihua; Cheng, Linsong; Huang, Shijun; Li, Bokai; Shen, Fei; Fang, Wenchao; Hu, Chang‐Ming

doi:10.1016/j.enconman.2015.03.057

Cited by 80 publications

(19 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the law of energy conversation, it obtains

\frac{1}{w_{i}} \frac{d Q_{i}}{dl} + \frac{d h_{i}}{dl} + \frac{d}{dl} (\frac{v_{i}^{2}}{2}) = 0,

where dQ i / dl is the heat flow rate from the steam to the surrounding formation at the i ‐th segment, whose detailed expression can be found in Gu et al; h i is the specific enthalpy of steam at the outlet of the i ‐th segment.…”

Section: Model Descriptionmentioning

confidence: 99%

“…However, for the horizontal wells, the heating process is divided into several processes based on whether the frontier of heat area reaches boundary or not . More importantly, as the steam flows along the horizontal wellbore, the steam temperature, pressure, and quality always change with horizontal well length . Therefore, those above heating models of vertical wells cannot be used to directly predict the heating area of horizontal wells .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

An integrated model for productivity prediction of cyclic steam stimulation with horizontal well

Fan

et al. 2019

Energy Science & Engineering

View full text Add to dashboard Cite

As the accurate productivity prediction of cyclic steam stimulation with horizontal well (CSSHW) is essential for its effective utilization in heavy oil reservoirs, a novel integrated model for predicting productivity of CSSHW was proposed in this paper. Firstly, governing equations to predict thermophysical parameters of injected steam in the horizontal well were established. On the basis, the heating model for radius of hot fluid zone and steam zone were derived respectively according to a more realistic temperature distribution of formation. Then, coupled with heating model, the productivity prediction model was established according to the principle of equivalent percolation resistance. Then, comparisons have been made among the new model results, CMG STARS results, and measured data to verify its accuracy. Finally, after the new proposed model is validated, the effects of steam quality and injection rate on heating radius and oil production were analyzed in detail. The results indicate that the result of new model is in good agreement with that of CMG STARS and measured data, verifying the correctness of the model. In addition, the radius of hot fluid zone and steam zone both decreases with horizontal well length because of the heat losses as the steam flows along the horizontal wellbore. Influential factor analysis shows that high steam quality and steam injection rate can improve heating radius and cumulative oil production.

show abstract

“…Based on the law of energy conversation, it obtains

\frac{1}{w_{i}} \frac{d Q_{i}}{dl} + \frac{d h_{i}}{dl} + \frac{d}{dl} (\frac{v_{i}^{2}}{2}) = 0,

Section: Model Descriptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An integrated model for productivity prediction of cyclic steam stimulation with horizontal well

Fan

et al. 2019

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

“…On the contrary, this part of the energy that was lost. The real energy conservation equation in the wellbore should be expressed as:

\frac{d Q}{d z} = - w \frac{d h}{d z} - w \frac{d}{d z} (\frac{v^{2}}{2}) + w g cos θ

…”

Section: Model Applicationmentioning

confidence: 99%

“…On the contrary, this part of the energy that was lost. The real energy conservation equation in the wellbore should be expressed as: [34][35][36]41,54,61,63,66,69,70,75,76,83,[85][86][87][88][89][90]…”

Section: Model Comparisonmentioning

confidence: 99%

Exploitation of heavy oil by supercritical CO₂: Effect analysis of supercritical CO₂ on H₂O at superheated state in integral joint tubing and annuli

Sun

Yao

et al. 2018

Greenhouse Gases

View full text Add to dashboard Cite

The injection of supercritical CO2 coupled with superheated steam (SHS) for heavy oil recovery can improve development efficiency. In order to help oil fields to improve the efficiency of CO2 and SHS utilization we must predict the thermophysical properties at well bottom. Based on the mass, energy, and momentum conservation equations, a non‐isothermal pipe‐flow model is established considering heat exchange between the integral joint tubing (IJT) and annuli. Coupled with the transient thermal conduction model in stratum and the S‐R‐K real gas model, a comprehensive model is established for the mixture flow in concentric dual‐tubing wells (CDTW). The model is solved by a numerical method and an iteration technique. The results show that: (a) the accuracy of the temperature profile calculation has been greatly improved compared with the previous model; (b) the heat‐carrying capacity per unit mass of the mixture and heating efficiency decrease with increasing supercritical CO2 content; (c) when a temperature difference exists between the IJT and annuli, a rapid flow of thermal energy exists inside the CDTW, which causes a significant temperature change near the wellbore, but the influence of temperature change on pressure profiles is negligible. © 2018 Society of Chemical Industry and John Wiley & Sons, Ltd.

show abstract

“…Holst and Flock [14] further improved the Ramey's and Satter's model by including friction losses and kinetic energy effects. Gu et al [15][16][17] presented a solution for calculating steam pressure not by dividing flow patterns and determining transition criteria but by the law of energy conservation, and based on it a comprehensive mathematical model was derived for estimating the wellbore heat efficiency.…”

Section: Introductionmentioning

confidence: 99%

An Improved Steam Injection Model with the Consideration of Steam Override

Fan

et al. 2017

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

View full text Add to dashboard Cite

-The great difference in density between steam and liquid during wet steam injection always results in steam override, that is, steam gathers on the top of the pay zone. In this article, the equation for steam override coefficient was firstly established based on van Lookeren's steam override theory and then radius of steam zone and hot fluid zone were derived according to a more realistic temperature distribution and an energy balance in the pay zone. On this basis, the equation for the reservoir heat efficiency with the consideration of steam override was developed. Next, predicted results of the new model were compared with these of another analytical model and CMG STARS (a mature commercial reservoir numerical simulator) to verify the accuracy of the new mathematical model. Finally, based on the validated model, we analyzed the effects of injection rate, steam quality and reservoir thickness on the reservoir heat efficiency. The results show that the new model can be simplified to the classic model (Marx-Langenheim model) under the condition of the steam override being not taken into account, which means the Marx-Langenheim model is corresponding to a special case of this new model. The new model is much closer to the actual situation compared to the Marx-Langenheim model because of considering steam override. Moreover, with the help of the new model, it is found that the reservoir heat efficiency is not much affected by injection rate and steam quality but significantly influenced by reservoir thickness, and to ensure that the reservoir can be heated effectively, the reservoir thickness should not be too small.Résumé -Un modèle amélioré d'injection de vapeur prenant en compte la surcharge de vapeur -La différence de densité entre la vapeur et le liquide lors de l'injection de vapeur humide conduit toujours à un débordement de vapeur, en d'autres termes, la vapeur s'accumule sur le dessus de la zone de production. Dans cet article, l'équation pour le coefficient de surcharge de vapeur a d'abord été établie sur la base de la théorie de la surcharge de vapeur de van Lookeren, puis le rayon de la zone de vapeur et la zone de fluide chaud ont été dérivés selon une distribution de température plus réaliste et un bilan énergétique dans la zone de production. Sur cette base, l'équation d'efficacité thermique du réservoir en tenant compte de la surpression de la vapeur d'eau a été développée. Par la suite, les résultats prévus par le nouveau modèle ont été comparés à ceux d'un autre modèle analytique et à CMG STARS (un simulateur numérique à réservoir commercial reconnu) pour vérifier la précision du nouveau modèle mathématique. Enfin, sur la base du modèle validé, nous avons analysé les effets du taux d'injection, de la qualité de la vapeur et de la densité du réservoir sur l'efficacité thermique du réservoir. Les résultats montrent que le nouveau modèle peut être simplifié par rapport au modèle classique (modèle de Marx-Langenheim) à condition que la 2017 DOI: 10.2516 This is an Open Access article dist...

show abstract

Steam injection for heavy oil recovery: Modeling of wellbore heat efficiency and analysis of steam injection performance

Cited by 80 publications

References 20 publications

An integrated model for productivity prediction of cyclic steam stimulation with horizontal well

An integrated model for productivity prediction of cyclic steam stimulation with horizontal well

Exploitation of heavy oil by supercritical CO₂: Effect analysis of supercritical CO₂ on H₂O at superheated state in integral joint tubing and annuli

An Improved Steam Injection Model with the Consideration of Steam Override

Contact Info

Product

Resources

About

Steam injection for heavy oil recovery: Modeling of wellbore heat efficiency and analysis of steam injection performance

Cited by 80 publications

References 20 publications

An integrated model for productivity prediction of cyclic steam stimulation with horizontal well

An integrated model for productivity prediction of cyclic steam stimulation with horizontal well

Exploitation of heavy oil by supercritical CO2: Effect analysis of supercritical CO2 on H2O at superheated state in integral joint tubing and annuli

An Improved Steam Injection Model with the Consideration of Steam Override

Contact Info

Product

Resources

About

Exploitation of heavy oil by supercritical CO₂: Effect analysis of supercritical CO₂ on H₂O at superheated state in integral joint tubing and annuli