02163nmc a2200253 4500 20260520005439.0 260224s xxu esp Español 068.82 553.28 C62 2018 0015648 Daño de formación en la cara de la fractura Implicancias en rocas tight, Cuenca del Golfo San Jorge 29/06/2022 ; 25/02/2019 8 p. ; 109-117 Formation damage generates important deterioration in the petrophysical properties of the reservoirs. The case of this study corresponds to a well in the province of Santa Cruz, Argentina, with productions much lower than expected, coming from tight reservoirs (K <0,1 mD). To evaluate the presence of damage, a new laboratory technique was applied to simulate a hydraulic frac stage during which the gelled fluid for frac remained in contact with the reservoir for more than thirty days. Samples of a core were analyzed by physical measurements, thin sections and scanning with the electronic microscopy before and after immersing the samples in the frac fluid under reservoir conditions and for a period of twenty days. The lithologies analyzed were fine tuffs, tobaceous sandstones and very fine tuffs and in all three there was evidence of formation damage. Zeolites and chlorites were the minerals most susceptible to alteration with the frac gelled fluid and the main damage mechanisms were the physical and chemical alteration of zeolites and the loss of crystallinity in chlorites, in both cases with possible formation of residues obstructing the limited permeable throats of tight reservoirs. CONGTP Ofeliz, Silvia 741 Iovine, Gastón 742 Congreso de Exploración y Desarrollo de Hidrocarburos (10mo. : 2018 nov. 5 - 9 : Mendoza) 573 Simposio de Evaluación de Formaciones (2018 nov. 5 - 9 : Mendoza) 675 Daño de formación 743 Rocas tight 744 128423 128423 https://biblioteca.iapg.org.ar/ArchivosAdjuntos/Conexplor2018/SEF/1480.pdf 0 0 0 0 199345 BVIAPG BVIAPG 068.82 553.28 C62 2018 0015648 2026-03-02 200064920 0 068.82 553.28 C62 2018 0015648 200064920 2026-03-02 23:26:23 2026-03-02 ARCHIVO