Acidizing Process in Acid Fracturing

Authors

  • B. E. Bekbauov Al-Farabi Kazakh National University, Faculty of Mechanics and Mathematics 39/47 Masanchi str., 050012, Almaty, Republic of Kazakhstan

DOI:

https://doi.org/10.18321/ectj310

Abstract

The theory and numerical implementation of acid-fracturing model that solves the 2D fracture geometry leakoff, acid transport and acid-rock reaction simultaneously will be presented. The mathematical model proovides a penetration distance for acid fracturing. Due to limitation of analytical solution, a finite-difference method was developed for modelling the fracture acidizing process. Example was solved for HCl reaction in limestone and dolomite fractures, and the results are presented in graphical form. The acid-transport model integrates a number of features which were not accounted for an earlier design models: comprehensive study of hydrodynamic process; acidizing controlled by mass transfer, rate of reaction, and leakoff. Coupling with reservoir forecasting models gives the ability to optimize the job.

References

1. Roberts, L.D. and Guin, J.A.: “The Effect of Surface Kinetics in Fracture Acidizing,” SPEJ (August, 1974) 385-95; Trans., AIME, 257.

2. Williams, B.B. et al.: “Characterization of Liquid-Solid Reactions. Hydrochloric Acid-Calcium Carbonate Reaction,” Ind. & Eng. Chem. Fund. (1970) 9, No. 4, 589.

3. Nierode, D.E. and Williams, B.B.: “Characteristics of Acid Reaction in Limestone Formations,” SPEJ (Dec. 1971) 406-18; Trans., AIME, 251.

4. Ben Naceur, K. and Economides, M.J.: “Designand Evaluation of Acid Fracturing Treatments,” paper SPE 18978 presented at the 1989 SPE Rocky Mountain Regional/Low Permeability Reservoirs Symposium, Denver, March 6-8.

5. Lo, K.K. and Dean, R.H.: “Modeling of Acid Fracturing,” SPEPE (May 1989) 194-200; Trans., AIME, 287.

6. Gdanski, R.D. and Lee, W.S.: “On the Design of Fracture Acidizing Treatments,” paper SPE 18885 presented at the 1989 SPE Production Operations Symposium, Oklahoma City, March 13-14.

7. Settari A., Simtech Consulting Services Ltd. “Modeling of Acid-Fracturing Treatments,” SPE Production & Facilities, Volume 8, Number 1, February 1993.

8. Tinsley, J. M., Williams, J. R., Tiner, R. L., and Malone, W. T.: “Vertical Fracture Height – Its Effect on Steady-State Production Increase,” J. Pet. Tech. (May 1969) 633-638; Trans., AIME, Vol. 246.

9. McCuire, W. J., and Sikora, V. J.: “The Effect of Vertical Fractures on Well Productivity,” Traans., AIME (1960) Vol. 219, 401-403.

10. Dill, W. R.: “Reaction Times of Hydrochloric Acetic Acid Solutions on Limestone,” paper presented at 16th Southwest Regional ACS Meeting, Oklahoma City, Okla (Dec. 1960).

11. Barron, A. N., Hendrickson, A. R., and Wieland, D. R.: “The Effect of Flow on Acid Reactivity in a Carbonate Fracture,” J. Pet. Tech. (April 1962) 409-415; Trans., AIME, Vol. 225.

12. Williams, B. B., Gidley, J. L., Guin, J. A., and Schechter, R. S.: “Characterization of Liquid Solid Reactions,” Ind. And Eng. Chem. Fund. (1970) Vol. 9, 589.

13. Nierode, D. E., and Williams, B. B.: “Charact teristics of Acid Reaction in Limestone Formations,” Soc. Pet. Eng. J. (Dec 1971) 406-418; Trans., AIME, Vol. 251.

14. Williams, B. B., and Nierode, D. E.: “Design of Acid Fracturing Treatments,” J. Pet. Tech. (July 1972) 849-859; Trans., AIME, Vol. 253.

15. Belocerkovsky, O. M.: “Numerical Modelling in Continuum Mechanics,” M.: Nauka. Main editorial staff of physical-mathematical literature, 1984. – 520 p.

16. Roache, P.J.: “Computational Fluid Dynamics,” Hermosa Publishers, 1976. – 487 p.

Downloads

Published

2009-04-20

How to Cite

Bekbauov, B. E. (2009). Acidizing Process in Acid Fracturing. Eurasian Chemico-Technological Journal, 11(2), 159–167. https://doi.org/10.18321/ectj310

Issue

Section

Articles