An integrated heat efficiency model for superheated steam injection in heavy oil reservoirs

He, Congge; Xu, Aiguo; Fan, Zifei; Zhao, Lun; Zhang, Angang; Shan, Fachao; He, Jun

doi:10.2516/ogst/2018082

Cited by 6 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To demonstrate its validity, their calculation results are compared against the simulation results of the STARS Module in CMG. Sun et al [26,27] developed a production prediction model on the cyclic superheated steam stimulation process. It was observed that compared with the conventional CSS process, in their models, the superheated steam region is proximate to the wellbore instead of to the saturated steam region.…”

Section: Introductionmentioning

confidence: 99%

A Production Performance Model of the Cyclic Steam Stimulation Process in Multilayer Heavy Oil Reservoirs

Fan

Zheng

et al. 2022

Energies

View full text Add to dashboard Cite

Cyclic steam stimulation (CSS) is a typical enhanced oil recovery method for heavy oil reservoirs. In this paper, a new model for the productivity of a CSS well in multilayer heavy oil reservoirs is proposed. First, for the steam volume of each formation layer, it is proposed that the total steam injection volume will be split by the formation factor (Kh) for the commingled steam injection mode. Then, based on the equivalent flow resistance principle, the productivity model can be derived. In this model, the heavy oil reservoir is composed of a cold zone, a hot water zone, and a steam zone. Next, using the energy conservation law, the equivalent heating radius can be calculated with the consideration of the steam overlay. Simultaneously, a correlation between the threshold pressure gradient (TPG) and oil mobility is also applied for the productivity formula in the cold zone and the hot water zone. Afterward, this model is validated by comparing the simulation results with the results of an actual CNOOC CSS well. A good agreement is observed, and the relative error of the cumulative oil production is about 2.20%. The sensitivity analysis results indicate that the effect of the bottom hole pressure is the most significant, followed by the TPG, and the effect of the steam overlay is relatively slight. The formation factor can affect the splitting of the steam volume in each layer; thus, the oil production rate will be impacted. The proposed mathematical model in this paper provides an effective method for the prediction of preliminary productivity of a CSS well in a multilayer heavy oil reservoir.

show abstract

Section: Introductionmentioning

confidence: 99%

A Production Performance Model of the Cyclic Steam Stimulation Process in Multilayer Heavy Oil Reservoirs

Fan

Zheng

et al. 2022

Energies

View full text Add to dashboard Cite

show abstract

“…In recent years, He et al improved the formation heating model by considering the nonisothermal distribution of formation temperature and the effect of steam overlay effect. Zhou et al set up a formation heating model for superheated steam injection with vertical wells, which was further improved by He et al who adopted a more realistic formation temperature distribution of superheated steam injection. As to our knowledge, there is big difference between vertical and horizontal section of wellbore.…”

Section: Introductionmentioning

confidence: 99%

“…As to our knowledge, there is big difference between vertical and horizontal section of wellbore. For example, the gas injection tubing usually is surrounded by insulation, casing, and cementing in the vertical wellbore; nevertheless, the gas injection tubing usually is surrounded by cementing or is bare to formation . Also, there are great differences in the heating processes between vertical wells and horizontal wells .…”

Section: Introductionmentioning

confidence: 99%

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

Fan

et al. 2019

Energy Science & Engineering

Self Cite

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

Thermal recovery of coalbed methane: Modeling of heat and mass transfer in wellbores

Nie

Sun²

2023

Energy

View full text Add to dashboard Cite

An integrated heat efficiency model for superheated steam injection in heavy oil reservoirs

Cited by 6 publications

References 23 publications

A Production Performance Model of the Cyclic Steam Stimulation Process in Multilayer Heavy Oil Reservoirs

A Production Performance Model of the Cyclic Steam Stimulation Process in Multilayer Heavy Oil Reservoirs

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

Thermal recovery of coalbed methane: Modeling of heat and mass transfer in wellbores

Contact Info

Product

Resources

About