An Improved Model to Simulate Mud (Drilling Fluid) Dispersion through Porous Media

Document Type : Research Article


1 Improved Oil Recovery Research Center, NIOC, TEHRAN, I.R. IRAN

2 EOR Center,Research Institute of Petroleum Industry (RIPI), TEHRAN, I.R. IRAN

3 Faculty of Chemical Engineering, Amir Kabir University, Tehran, I.R. IRAN

4 Department of Petroleum Engineering, Petroleum University of Technology, Ahwaz, I.R. IRAN


An improved model of mud dispersion has been introduced in this work. The advantages of this model consist of a new analytical correlation for dispersivity by using resistivity log data and using a new aspect of capacitance dispersion model. Mathematical formulations were expressed, solved by numerical model taking advantage of actual log and formation data. Achieved results yielded reasonable values and trends which can be used to predict the drilling fluid concentration near wellbore region and interpret the well log data. In comparison with the previous models (Civan and Engler, 1994; Donaldson and Chernoglazov, 1987), this model uses more reasonable data and assumptions making it closer to real conditions.  


Main Subjects

[1] Civan F., Engler T., Drilling Mud Filtrate Invasion-Improved Model and Solution, J. of Petroleum Science and Engineering, 18 (10), p. 1005 (1994).
[2] Donaldson E.C., Kendall R.F., Userda, Manning F.S., Dispersion and Tortuosity in Sandstones, "Presented for the 51st Annual Fall Technical Conference and Exhibition of the Society of Petroleum Engineering of AIME", SPE6190, New Orleans, (1976).
[3] a) Civan F., “Reservoir Formation Damage”, Gulf Publishing. Co. (2000).
     b) Donaldson E.C., Chernoglazov V., Drilling Mud Fluid Invasion Model, J. of Petroleum Science and Engineering, 1(1), p. 3 (1987).
[4] Gerald C.F., Wheatly P., “Applied Numerical Analysis”, Addison-Wesley Publishing. Co. (1999).
[5] Sahimi M., “Flow and Transport in Porous Media and Fractured Rock”, VCH .Co (1995).
[6] Chen S., Menzie D. E., Modeling of Dispersion Phenomena in Miscible Fluid Flow Through Porous Media, "Presented at the First International Congress of Oil, Gas, Petrochemical", 1, p. 1 (1990).
[7] Chen S., Thomas C., A Simple Approach to Mud-Invasion Correction for Dual Laterolog Resistivities, "Presented at the SPE Permian Basin Oil and Gas Recovery Conference" SPE 23962, Texas (1992).
[8] Harleman  D.R.F.,  Mehlhorn  P.F.,  Rumer  R.R., J. of the Hydraulic Div.,Proc. Amer. Soc. Civil Eng., p. 67 (1963).
[9] Chen S., "Investigation of Dispersivity as a Reservoir Rock Characteristic and its Determination from Well Logs" Ph.D. Dissertation, the University of Olahoma, Norman, Oklahoma (1991)
[10] Chen S., Thomas C., Menzie D.E., SPWLA 33rd Annual Logging Symposium, (1992).
[11] Prausnitz J. M., AIChE J., 4 (1), p. 14M (1958).
[12] Koval E.J., SPE Jour., p. 145 (1963).
[13] "Petrophisical Data of Iranian South Reservoir", National Iranian South Oil Company, (2003).
[14] a) Perkins T.K., Johnston O.C., A Review of Diffusion and Dispersion in Porous Media,
Soc. Petrol. Eng. J., 3 (1), p. 70 (1963).
       b) Sahimi M., "Flow and Transport in Porous Media and Fractured Rock", VCH Co (1995)
[15] a) Raimondi  P.,  Gardner  G.H.F.,  Patrick  G.B., Effect of Pore Structure and Mulecular Diffusion on the Mixing of Miscible Liquids in Porous Media, "AIChE/SPE Joint Symposium", Sanfransisco, Dec.6-9. (1959).
       b) "Petrophisical Data of Iranian South Reservoir", National Iranian South Oil Company, (2003).
[16] Stalkup F.I., "Miscible Displacement", SPE Monograph no.8. (1980).
[17] Green D.W., Willhite G.P., "Enhanced Oil Recovery", Richardson Co, Texas, (1998).