Temperature Prediction of oil well During Circulation of Compressible Aerated Fluids with Leakage

Temperature Prediction of oil well During Circulation of Compressible Aerated Fluids with Leakage

Naizhen Liu* Qingchun Gao

CNPC Great Wall Drilling Engineering Co., Ltd., Panjin 124000, China

Corresponding Author Email: 
5 June 2018
30 June 2018
30 June 2018
| Citation



Aerated fluids drilling has been widely used when drilling conventional oil wells, unconventional gas well and geothermal wells for many reasons. The main reason to use aerated fluids is that the technique can minimize circulation losses and prevent the formation from damaging. This paper studied the temperature distribution of oil well with high temperature, when the wells were drilled with aerated fluids and circulation losses occurred at the same time. A coupled wellbore flow model was developed considering the interaction between pressure distribution and temperature distribution. Then the temperature distribution was solved using MATLAB Software accounting for the transient heat transfer because of aerated fluids leakage into the reservoir. The simulation result shows that compared with the temperature prediction model assuming no gas compressibility, the temperature distribution model considering gas compressibility can fit field data better and the new model can predict the temperature distribution of aerated fluids with circulation losses well. When gases injected into the well increased, the temperature in the annulus at the wellhead increased at the same time, but the temperature at the bottom showed the opposite phenomenon. The increment of circulation losses will reduce the temperature of aerated fluids, but the effect is not much.


aerated fluids, circulation losses, oil well, temperature prediction

1. Introduction
2. Physical Model and Assumptions
3. Coupled MODEL Between Temperature and Pressure
4. Computation and Results
5. Conclusion

[1] Steve N, Julmar Shaun S. (2010). Geothermal aerated fluids drilling operations in Asia Pacific. Proceedings World Geothermal Congress 2010. 

[2] Jiang JS, Rabbi F, Wang QS. (2014). Underbalanced drilling technology with air injection connector. Journal of Petroleum Exploration and Production Technology 4(3): 275-280. https://doi.org/10.1007/s13202-013-0089-3.

[3] API (1990). Specification for material and testing for well cements. 5th ed. Washington, DC: American Petroleum Institute, p. 47.

[4] Farris RF. (1941). A practical evaluation of cement for oil wells. Drilling Production Practice. American Petroleum Institute 11: 283–92.

[5] Barnett E, Wu CR, You Z. (2013). Determining rate profile in gas wells from pressure and temperature depth distributions. IPTC: International Petroleum Technology Conference.

[6] You Z, Bedrikovetsky P. (2015). Depth distribution of gas rates from temperature and pressure profiles in unconventional gas wells. SPE Asia Pacific Unconventional Resources Conference and Exhibition, Society of Petroleum Engineering. 

[7] Li J, Guo B, Yang S. (2014). The complexity of thermal effect on rock failure in gas-drilling shale-gas wells. Journal of Natural Gas Science and Engineering 21: 225-259.

[8] Li J, Guo B, Li B. (2015). A closed form mathematical model for predicting gas temperature in gas-drilling unconventional tight reservoirs. Journal of Natural Gas Science and Engineering 27:284-289. 

[9] Garcia A, Santoyo E, Espinosa G, Hernandez I. (1998). Estimation of temperatures in geothermal wells during circulation and shut-in. Transport in Porous Media 33: 103-27.

[10] Espinosa G, Garcia A. (2004). Thermal behavior of geothermal wells using mud and air–water mixtures as drilling fluids. Energy Conversion and Management 45: 1513-1527. 

[11] Yoshioka K, Zhu D, Hill AD. (2005). A comprehensive model of temperature behavior in a horizontal well. SPE-95656-MS. SPE Annual Technical Conference and Exhibition, Dallas, Texas. https://doi.org/10.2118/95656-MS

[12] Yoshioka K, Zhu D, Hill AD. (2005). Interpretation of temperature and pressure profiles measured in multilateral wells equipped with intelligent completions. SPE-94097-MS. SPE Europec/EAGE Annual Conference, Madrid, Spain. https://doi.org/10.2118/94097-MS

[13] Hasan AR, Kabir CS, Wang XW. (2009). A robust steady-state model for flowing-fluid temperature in complex wells. SPE Production & Operations 24(2): 269-276. https://doi.org/10.2118/109765-PA

[14] Gilbert P, Peysson Y, Vincke O. (2009). Numerical computation of a circulating drilling fluid. SPE-125697-MS. https://doi.org/10.2118/125697-MS