Key words: porous medium; near-wellbore zone; transport of solids; drill mud; internal filter-cake.
The authors present a new technique for estimating of kinetic parameters of internal filter-cake buildup by combining laboratory mud-filtration experiments with a profile of invaded mud components reconstructed by X-ray microcomputed tomography, image processing of a cleaved sample, and ultrasonic wave scanning. We include examples of reconstructed profiles of invaded mud components (solid particles and bentonite clay) as well as the procedure of determining of internal filter-cake parameters. Using obtained profiles we demonstrate that value of “critical porosity” when all mud particles stop to penetrate into porous medium and depost at the sandface, forming the external filter-cake. In the case of heterogeneous rock (limestone) the group of high-conductive pores is visualized.
Developed experimental techniques allow obtain the profile of mud components in core sample, determine the parameters of clogging kinetic and, then, calculate the mud components and permeability profiles in the near-wellbore zone.
References
1. Jiao D., Sharma M.M., Formation damage due to static and dynamic filtration of water-based muds, SPE 23823, 1992.
2. Longeron D.G., Alfenore J., Salehi N., Saintpère S., Experimental approach to characterize drilling mud invasion, formation damage and cleanup efficiency in horizontal wells with openhole completions, SPE 58737, 2000.
3. Herzig J.P., Leclerc D.M., Le Goff P., Flow of suspensions through porous
media – application to deep filtration, Industrial and Engineering Chemistry,
1970, V. 62, no. 5, pp. 8–35.
4. Bai R., Tien C., Effect of deposition in deep-bed filtration: determination and search of rate parameters, Journal of Colloid and Interface Science, 2000, V. 231, pp. 299–311.
5. Bedrikovetsky P., Marchesin D., Shecaira F. et al., Characterisation of deep
bed filtration system from laboratory pressure drop measurements, Journal of
Petroleum Science and Engineering, 2001, V. 32, pp. 167–177.
6. Mikhaylov N.N., Izmenenie fizicheskikh svoystv gornykh porod v
okoloskvazhinnykh zonakh (Change in the physical properties of rocks in
boreholes zones), Moscow: Nedra Publ., 1987, 151 p.
7. Theuveny B., Mikhailov D., Spesivtsev P. et al., Integrated approach to simulation of near-wellbore and wellbore cleanup, SPE 166509, 2013.
8. Boek E.S, Hall C., Tardy P.M.J,. Deep bed filtration modelling of formation
damage due to particulate invasion from drilling fluids, Transport in Porous
Media, 2012, V. 91, no. 2, pp. 479-508.
9. Dewan J.T., Chenevert M.E., A model for filtration of water-base mud during drilling: determination of mudcake parameters, Petrophysics, 2001, V. 42, no.
3, pp. 237-250.
10. Mikhaylov N.N., Fizika neftyanogo i gazovogo plasta (Physics of oil and
gas reservoir), Moscow: Maks-Press Publ., 2008, 447 p.
11. Civan F., Reservoir formation damage: fundamentals, modeling, assessment and mitigation, Gulf Publishing Company, 2007, 1089 p.
12. Dinariev O.Yu., Mikhailov D.N., Basics of mesoscale theory for porous materials, Moscow: Nedra Publ., 2012.
13. Dobrynin V.M., Vendel'shteyn B.Yu., Kozhevnikov D.A., Petrofizika (fizika gornykh porod) (Petrophysics (physics of rocks)), Moscow: Neft' i gaz Publ., 2004, 368 p.
14. Nikolaevskiy V.N., Basniev K.S., Gorbunov A.T., Zotov G.A., Mekhanika
nasyshchennykh poristykh sred (Mechanics of saturated porous media),
Moscow: Nedra Publ., 1970, 339 p.
15. Khan M.A. et al., A non-destructive method for mapping formation damage, Ultrasonics, 2001, V. 39, pp. 321-328.
To buy the complete text of article (Russian version a format - PDF) or to read the material which is in open access
.
