In view of the lost circulation in fractured formations, a two-dimensional transient model for describing a power-law drilling fluid loss in an arbitrarily-oriented, compressible, permeable, rough-walled fracture was introduced. In this model, the mechanical fracture aperture and fracture tortuosity...
In view of the lost circulation in fractured formations, a two-dimensional transient model for describing a power-law drilling fluid loss in an arbitrarily-oriented, compressible, permeable, rough-walled fracture was introduced. In this model, the mechanical fracture aperture and fracture tortuosity were considered to investigate the effect of fracture roughness on fluid loss dynamics. The governing equation of power-law fluid loss model was given and solved to analyze the fluid loss dynamics in fractured formations. The results show that the shear thinning behavior of power-law drilling fluid can result in high fluid loss rate at the initial stage of loss event; the fluid loss rate decreases as the fracture tortuosity increases, meanwhile, the effect of fracture tortuosity on fluid loss rate will decrease as the fracture aperture becomes larger; the larger the initial fracture aperture, fracture dip, fracture dimensions or fracture length, the higher the fluid loss rate will be; the fluid loss rate of rectangular fractures is much lower than that of square fractures; the higher the total leak-off coefficient, the higher the fluid loss rate will be; the fluid loss rate is the highest when the wellbore intersects the fracture at the center location; the fluid loss rate increases sharply as the differential pressure increases; the larger the normal stiffness of the fracture, the lower the mud loss rate will be.
In view of the lost circulation in fractured formations, a two-dimensional transient model for describing a power-law drilling fluid loss in an arbitrarily-oriented, compressible, permeable, rough-walled fracture was introduced. In this model, the mechanical fracture aperture and fracture tortuosity were considered to investigate the effect of fracture roughness on fluid loss dynamics. The governing equation of power-law fluid loss model was given and solved to analyze the fluid loss dynamics in fractured formations. The results show that the shear thinning behavior of power-law drilling fluid can result in high fluid loss rate at the initial stage of loss event; the fluid loss rate decreases as the fracture tortuosity increases, meanwhile, the effect of fracture tortuosity on fluid loss rate will decrease as the fracture aperture becomes larger; the larger the initial fracture aperture, fracture dip, fracture dimensions or fracture length, the higher the fluid loss rate will be; the fluid loss rate of rectangular fractures is much lower than that of square fractures; the higher the total leak-off coefficient, the higher the fluid loss rate will be; the fluid loss rate is the highest when the wellbore intersects the fracture at the center location; the fluid loss rate increases sharply as the differential pressure increases; the larger the normal stiffness of the fracture, the lower the mud loss rate will be.
10.2118/47268-MS Bertuzzi F, Sanfilippo F, Brignoli M, et al. Characterization of flow within natural fractures: Numerical simulations and field applications. SPE 47268, 1997.
10.2118/71737-MS Beda G, Carugo C. Use of mud microloss analysis while drilling to improve the formation evaluation in fractured reservoirs. SPE 71737, 2001.
10.2118/36832-MS Lietard O, Guillot D, Hodder M. Fracture width LWD and drilling mud/LCM selection guidelines in naturally fractured reservoirs. SPE 36832, 1996.
10.2118/38177-MS Sanfillippo F, Brignoli M, Santarelli F J, et al. Characterization of conductive fractures while drilling. SPE 38177, 1997.
Lavtov 189 2003 Proceedings of 6th International Conference on Analysis of Discontinuous Deformation Mud loss into a single fracture during drilling of petroleum wells: Modeling approach
10.2118/88700-MS Lavtov A, Tronvoll J. Modeling mud loss in fractured formations. SPE 88700, 2004.
Acta Mechanica Lavtov 186 1/2/3/4 55 2006 Newtonian fluid flow from an arbitrarily-oriented fracture into a single sink
SPE Drilling & Completion Majidi 25 4 509 2010 10.2118/114130-PA Quantitative analysis of mud losses in naturally fractured reservoirs: The effect of rheology
10.2118/114630-MS Majidi R, Miska S Z, Yu M, et al. Modeling of drilling fluid losses in naturally fractured formations. SPE 114630, 2008.
10.2118/115526-MS Majidi R, Miska S Z, Yu M, et al. Fracture ballooning in naturally fractured formations: Mechanism and controlling factors. SPE 115526, 2008.
Vadose Zone Journal Ozdemirtas 8 1 250 2009 10.2136/vzj2007.0174 Effects of fractal fracture surface roughness on borehole ballooning
International Journal of Rock Mechanics and Mining Sciences Ozdemirtas 47 7 1200 2010 10.1016/j.ijrmms.2010.07.002 Experimental investigation of borehole ballooning due to flow of non-Newtonian fluids into fractured rocks
Journal of Geophysical Research: Solid Earth (1978-2012) Brown 90 B14 12575 1985 10.1029/JB090iB14p12575 Broad bandwidth study of the topography of natural rock surfaces
Journal of Geophysical Research: Solid Earth (1978-2012) Brown 92 B2 1337 1987 10.1029/JB092iB02p01337 Fluid flow through rock joints: The effect of surface roughness
Geophysical Research Letters Brown 22 18 2537 1995 10.1029/95GL02666 Applicability of the Reynolds equation for modeling fluid flow between rough surfaces
Journal of Geophysical Research Renshaw 100 B12 24629 1995 10.1029/95JB02159 On the relationship between mechanical and hydraulic apertures in rough-walled fractures
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts Zimmerman 28 4 325 1991 10.1016/0148-9062(91)90597-F Lubrication theory analysis of the permeability of rough-walled fractures
Journal of Geophysical Research: Solid Earth (1978-2012) Wait 104 B6 13049 1999 10.1029/1998JB900035 A new conceptual model for fluid flow in discrete fractures: An experimental and numerical study
※ AI-Helper는 부적절한 답변을 할 수 있습니다.