... Abstract In this work a numerical simulation model is presented to evaluate the effect on productivity of the filtration, transport and retention of particulate material, as well as geomechanical effects during drilling operations in naturally fractured reservoirs. The model proposed consists...

... surface deposition particle size small particle permeability entrapment experiment retention filtration Introduction Formation damage is a result of forming an internal filter cake in the near wellbore region, and an external filter cake at the sand face due to fines migration...

... wellbore pressure, the injection rate decline is described by a nonlinear integro-differential equation that is solved iteratively. The solution under the field conditions investigated shows that well impedance grows faster during deep bed filtration than during external cake formation. This unusual...

... Abstract Drilling fluid's filtration and mud cake build up is often cited as one of the key factors where operators observed better control of lost circulation from one well to another. Although this may sound a routine and simplistic process, it is quite complex. To understand a true synthesis...

... Fluid filtration and invasion occur in drilling oil wells operations in overbalanced conditions. In static and dynamic condition, the buildup of a porous and compressible cake on the wall of the well avoids the inadequate invasion and possible damage to the reservoir. The composition...

... and associated damage mechanisms, there is an apparent lack of subsidiary data itself. Such subsidiary data include filtrate losses and flow initiation pressures. What do these values indicate and is there a correlation between these values with respect to return permeability? This paper will answer...

... Abstract The filtration of solids in the injection water in a frac-pack is the primary factor which controls the injectivity decline in frac-packed water injection well completions. The injectivity may decline rapidly or much more slowly depending on the degree of frac-pack filtration...

... arm ratio was calculated from laboratory cross-flow filtration experiments and from well injectivity data. It was also determined from Hertz's theory for the elastic particle deformation on the solid cake surface. Good agreement between the results validates the developed mechanical equilibrium model...

.... condensate reservoir gastim concept Efficiency enhanced recovery Upstream Oil & Gas Phase Behavior novel technique complex reservoir concentration chemical concentration filtration society of petroleum engineers reduction dispersion gas injection method injector laboratory Well...

... The Darcy equation is simply the implication of fluid flow through porous media. This equation is based on the steady state conditions. This equation is solved by stepwising the problem which omits the filtrate invasion's time dependency. The Darcy equation in radial system coordinates in SI...

... the static filtration process considering the formation and properties of the filter cake. Both HTHP API press and core flow filtration experiments were performed to evaluate the leak-off behavior of OBM. Core filtration experiments were carried with the aid of a CT scanner to monitor the invasion...

..., 1988 ). The leak-off process is reminiscent of the filtration of particles during Produced Water Re-Injection (PWRI), for which a large body of literature exists ( Iwasaki 1937 ; Herzig et al. 1970 ; Bedrikovetsky, 1993 ; Elimelech et al., 1993; Sharma et al., 1997 ; Sharma and Yortsos 1987...

... whether the reported losses can be explained by dynamic filtration mechanisms and related seepage losses. Daily drilling reports were evaluated to reconstruct the downhole drilling environment. Accumulated dynamic and static filter loss periods were calculated. A dynamic filtration HPHT filter press...

... range 1 permeability pore size concentration particle filter cake filtration society of petroleum engineers Case (a) can only occur if the approach particles are much smaller than the pore size; case (b) is an external cake where most efficient pore blocking occurs if the pores and approach...

... of both the cake and core mass. Deposition in the Core: Deep-bed Filtration Theory To model the deposition inside the core, we use the equations from the classical Deep-Bed Filtration theory for linear flow in a core (see Herzig et al 1970 , Wennberg & Sharma 1997 , Bedrikovetsky et al...

... Abstract This paper describes a numerical filtration model validated by data obtained from an experimental dynamic filtration loop. The model predicts the filtercake buildup and filtrate flow rate in the drilling process using non-Newtonian muds. It is also able to calculate filtercake...

... the filter cakes at the same overbalance pressure was slower than the static mud filtration rate. Scratch tests showed a higher strength for the filter cake formed with the "initial" particle size distribution, and that both filter cakes strengthened significantly following brine diffusion. NMR T 2...

... accounting for particle release allows for exact solution under the assumptions of constant filtration coefficient and porosity. The explicit formulae permit the calculation of the model parameters (maximum retention concentration, filtration and formation damage coefficients) from the history...

... as well as for the choice and preventive treatment of injected water. One of the reasons for well injectivity decline is permeability decrease due to rock matrix plugging by solid/liquid particles suspended in the injected water. The mathematical model for deep bed filtration contains two empirical...

... of injectivity decline is important for the injected-water-treatment design,for injected water management (injection of sea- or produced water, their combinations, water filtering),etc. The classical deep bed filtration model accounts for a single physics mechanism of the particle capture. During laboratory...