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

Sun, Fengrui; Yao, Yuedong; Li, Xiangfang; Li, Guozhen; Huang, Liang; Líu, Hao; Chen, Zhili; Liu, Qing; Liu, Wenyuan; Cao, Meng; Han, Song

doi:10.1002/ghg.1764

Cited by 43 publications

(2 citation statements)

References 66 publications

(169 reference statements)

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“…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%

“…Recently, the models for estimating thermophysical properties and analyzing the performance of superheated steam injection in vertical wells and horizontal wells are established . Moreover, the flow and heat transfer characteristics of superheated steam in concentric dual‐tubing wells were analyzed . Sun et al studied the flow of supercritical CO 2 coupled with superheated water in horizontal wellbores.…”

Section: Introductionmentioning

confidence: 99%

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

Fan

et al. 2019

Energy Science & Engineering

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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.

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