Physics and Modeling of Permeability Damage Induced by Particle Deposition

Abstract

This paper was prepared for prescl]totion It the SPE Irrterno!inn~l Symposium on Formation Darnogc Control held in kfc~yctte, I.,)uisiami, 18-19 February 1998. This paper was selected for prcsel]tnli{~r]by an SPE Program Committee following review of inform~tion con[aincd in on :Lbstmc[ submitted by the author(s) Contents oof the paper, as presented, ha~te M)( heed reviewed by the Snciety of Petroleum Engineers and are subject to cor;e$tion by the author(s) The mil[erial, as presented, does no[ necessarily reflect any poslt!ur] of the S,>cicty of Petroleum Engineers, IIS officers, or members. PaWrs presented at SPE mettings arc subje~t tc~publication review by Editorial Committee of he Society of Petroleum Engitleers Electronic reproduction, distribution. or sfo[age of any pwt of this paper for r~>mmercial purposes witbu~tt the written crmsen[ of the Society of Petroleum Engineers is prnbibited Permissimr [o reprnduce in print is restricted to mr abstract of t]ot more tbtn 300 words; illustrations i~my not be copied, The abstract must conttin conspicuous acknowledgement of where mrd by whom the paper was presented. Write Librarim], SPE. P,O. Box 833836. Richwdson, TX 75083-3836, USA, fax 01-972-952-9435. AbstractThe different mechanisms leading to permeability damages due to particle deposition are analyzed under various situations relevant for oil production. The analysis is based on the relative importance (of the forces involved in the various deposition processes.In this way, different deposition regimes, characterized by the values of a few non-dimensional numbers, are defined. Among the major parameters, some are conventional and usually considered, such as particle and pore sizes, flow rate, particle concentration and suspending fluid viscosity.However, other parameters, which are often ignored, such as particle and pore shape and roughness, particle-particle and particle-pore wall interaction energies as well as pore surface physiochemical heterogeneity play an even more important role. In all cases, the regime determines deposition kinetics and the location~'here particles are deposited inside porous structure. As a consequence, determining both the deposition regime and the mechanism of permeability damage involved are prerequisites before any attempt to model and to predict permeability reduction. Due to the complexity of practical cases, experiments must be carried out to define the regime and the values of the major References and illustrations at end of paper parameters used as input in a suitable formation damage model.Comparisons between model predictions and experimental results obtained under well-controlled conditions show the cases where presently the permeability damage modeling is reliable.

Permeability Damage Due to Asphaltene Deposition : Experimental and Modeling Aspects

“…These authors also reported that the difference between outlet and inlet concentration decreases as flow rate increases. This is in line with our previous results [22,24,26] obtained with solid colloidal particles and supports the colloidal approach adopted here.…”

“…Considering the asphaltene/crude oil system as a colloidal suspension, model predictions using the PARticle Injection Simulator (PARIS model) developed for solid colloidal particles [21] and [22] have been compared with the results of some of the previous corefloods carried out under controlled conditions.…”

“…In the convection-diffusion regime, the general expression for the local deposition flux is given by [22] and [24]: (1) where: -C i f is the particle concentration in the flowing liquid; -K l is the transfer coefficient which is a local function of the flow rate and of the azimuthal position angle q measured from the forward stagnation point. Indeed, in the PARIS model, the deposition rate is considered to be non-uniform around the collecting grain, being higher near the forward stagnation point and decreasing as q increases; -P d is the deposition probability.…”

“…An analytical expression giving the relative capture efficiency, a, may be found in earlier published work [22] and [24].…”

The Colloidal Approach. A Promising Route for Asphaltene Deposition Modelling

“…This colloidal approach has been used successfully to model the deposition kinetics of different kind of colloid such as solid particles [16] and emulsion droplets [17]. This approach has been recently [15,18] experimentally validated through a systematic and thorough experimental investigation of the asphaltene deposition kinetics using different systems and under different experimental conditions.…”