This paper presents a brief bibliographic summary of the related well heat transfer models, most of them are designed for predicting heat loss along wells. All of those models lead to temperature profiles which show a lowering on fluid temperature during the injection from the wellhead to the wellbore, that make those models fit perfectly into the heat loss statement.
The purpose of this article is to show a way to calculate the temperature increase of a fluid injected at surface temperature along a well by modifying an existing equation which was proposed by Boyun Guo (2004), this one satisfies the non-phase change of the injected fluid during its flow through the well, this implies that the selected model does not take into account latent heat change of the injected fluid, the previous fact is very important for this study because it is supposed that the injected fluid is not going to change its phase.
Modifying Boyun Guo (2004) energy balance equation allowed to establish a profile temperature of a fluid injected at surface temperature into either a vertical or deviated well. It is also included a brief analysis of each of the parameters engaged on the process in order to determine the effect of those properties upon the injected fluid temperature.
Inhaltsverzeichnis (Table of Contents)
- WELL HEAT TRANSFER MODELS
- WELL HEAT TRANSFER MODEL
- MODEL FOR PREDICTING HEAT LOSS ON HOT INJECTED FLUIDS
- MODEL INTERPRETATION
- MODEL MODIFICATION
- MODEL RESPONSE
- PARAMETER ANALYSIS ON THE MODEL
- CONCLUSIONS
- NOMENCLATURE
- REFERENCES
- APPENDIX A.
Zielsetzung und Themenschwerpunkte (Objectives and Key Themes)
This paper aims to present a method for calculating the temperature increase of a fluid injected at surface temperature along a well. It builds on an existing model by Boyun Guo (2004), modifying it to account for the fluid's non-phase change during injection.
- Fluid temperature modelling in vertical and deviated wells
- Modification of existing models to predict temperature increase
- Analysis of parameters influencing fluid temperature
- Comparison of water-base and oil-base fluid behavior
- Development of a comprehensive temperature profile model
Zusammenfassung der Kapitel (Chapter Summaries)
- WELL HEAT TRANSFER MODELS: This section provides a review of existing models for predicting heat transfer in wells, highlighting their strengths and weaknesses.
- WELL HEAT TRANSFER MODEL: The model by Boyun Guo (2004) is presented and explained in detail. This model is chosen for its suitability to the study's purpose.
- MODEL FOR PREDICTING HEAT LOSS ON HOT INJECTED FLUIDS: This section presents the original energy balance equation for predicting heat loss during hot fluid injection.
- MODEL INTERPRETATION: The results of the original model are discussed, focusing on the temperature loss of a hot fluid due to the difference between fluid and rock temperatures.
- MODEL MODIFICATION: This section presents the modified model, adapted to calculate the temperature increase of a fluid injected at surface temperature.
- MODEL RESPONSE: The model's response is tested and analyzed, examining the temperature profiles of both water-base and oil-base fluids.
- PARAMETER ANALYSIS ON THE MODEL: This section analyzes the impact of different parameters on the fluid temperature profile.
Schlüsselwörter (Keywords)
The primary keywords and topics of this paper include fluid temperature, surface injection, model modification, temperature profile, vertical and deviated wells, parameter analysis, water-base and oil-base fluids, and thermal energy transfer. This research focuses on developing a model that accurately predicts the temperature increase of a fluid injected at surface temperature, while taking into account the non-phase change of the fluid during its flow through the well.
Frequently Asked Questions
How can you calculate temperature increase in injected fluids?
Temperature increase can be calculated by modifying Boyun Guo's (2004) energy balance equation, specifically for fluids injected at surface temperature into vertical or deviated wells.
Does the fluid change phase during injection?
The model presented in this paper assumes non-phase change, meaning it does not account for latent heat changes during the flow through the wellbore.
What factors influence the injected fluid temperature?
Key parameters include the type of fluid (water-base vs. oil-base), injection rate, well depth, and the geothermal gradient of the surrounding rock.
What is the difference between water-base and oil-base fluid behavior?
The two types of fluids have different thermal properties, which results in distinct temperature profiles when injected into the same well environment.
Why is Boyun Guo's model significant?
Boyun Guo's 2004 model provides a robust foundation for well heat transfer, which can be adapted from predicting heat loss to predicting heat gain for surface-temperature injections.
- Quote paper
- Jesus Rodriguez (Author), 2015, Fluid temperature modelling injected at surface temperature through vertical wells, Munich, GRIN Verlag, https://www.grin.com/document/305676
