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Optimisation de l'efficacité et de la durabilité des traitements de puits à base de polymères et de microgels dans un contexte de réduction des venues de sable

Abstract : Gas production from underground geological reservoirs in aquifers is sometimes associated with the erosion of solid particles from the rock matrix. These solids venues generated by the gas flow can cause damages to the equipment on site leading the operator to limit or stop the production of wells. The injection of hydro-soluble polymers (linear polyacrylamide or microgels) is one of the promising techniques employed today to reduce and, in some cases, stop the production of solids as demonstrated by the results of tests conducted in France on reservoirs of Storengy - GDF Suez.An experimental study was conducted to better understand the mechanisms underlying the performance of polymer treatments and to increase their efficiency. Two main aspects have been experimentally evidenced: sand grains consolidation and polymer coating of the pore surface. Tests were carried out to accurately assess the impact of the adsorption of polymer on the mobilization of particles (called fines) and a comprehensive study was conducted showing the properties of treatments to (re)consolidate the rock matrix. In the first case, the polymer acts as a physicochemical barrier preventing the detachment of fines that can form the inter-granular cement and the effectiveness of treatments is based on the proportion of pores surface covered by the polymer. In the second case, the polymer takes the place of cleaved cement; the effectiveness and durability of treatments thus depend on mechanical properties of the inter-granular solids bounds formed after drying of capillary bridges
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Theses
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http://docnum.univ-lorraine.fr/prive/INPL_T_2011_GRAVELLE_A.pdf
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https://hal.univ-lorraine.fr/tel-01754521
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Submitted on : Friday, March 30, 2018 - 9:51:59 AM
Last modification on : Thursday, March 5, 2020 - 12:23:17 PM

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  • HAL Id : tel-01754521, version 1

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Alexandre Gravelle. Optimisation de l'efficacité et de la durabilité des traitements de puits à base de polymères et de microgels dans un contexte de réduction des venues de sable. Alimentation et Nutrition. Institut National Polytechnique de Lorraine, 2011. Français. ⟨NNT : 2011INPL063N⟩. ⟨tel-01754521⟩

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