03326nam a2200301 4500 20260520010403.0 260224s2018 xxu esp Español 068.82 553.28 C62 2018 0015650 Ensayo de barrido para mejorar la recuperación de petróleo con un fluido multipropósito 2018 02/09/2025 ; 28/03/2019 17 p. ; 397-414 The recovery of heavy crude oil with high reservoir temperatures represents a challenge for improved oil recovery (EOR) with the application of chemical products (CEOR) as it is necessary to develop new polymers and / or their byproducts that will provide greater resistance to thermal degradation.This work focuses on the development of a multipurpose fluid consisting of a polyacrylamide (P), a mixture of surfactants (S) and an additive (A), resulting in a PSA fluid whose objective is to become a viscosifying agent, with ability to decrease the interfacial tension oil-brine and with the distinctive feature of decreasing the viscosity of the crude oil stored in the reservoir rock.The first step was to analyze the effect of the additive (A) on the rheology of the polymer-surfactant (SP) with an Anton Paar rheometer and on the interfacial tension between oil and brine with a Spinning Drop. The effect of the additive in individual form was analyzed on two heavy crude g the rheological behavior in a wide range of cut-off rates (1 to 1000 s-1) and in a temperature range (35 °C to 80 °C). From the results, a crude oil was selected and a dynamic laboratory-scale sweep test was carried out in a Triaxial cell, using a berea plugsandstone core as rock, under conditions of reservoir pressure and temperature. Petrophysical determinations carried out in the laboratory allow to have the characteristics of the porous medium, such as porosity (F), pore volume (VP) and absolute permeability (kabsw).As a strategy of the sweep, it was established to inject different displacing fluids having conditioned the porous medium to the residual oil saturation (Sor). The sequential injection for this test was 0.35 VP of the Polymer-Surfactant-Additive (PSA) formulation, 4 VP of the Polymer-Additive (PA) formulation and 10 VP of brine. With this injection strategy in the application of the CEOR process it was possible to recover 66.40% of Sor. With reference to the OOIP, the total recovery achieved by secondary and sequentially by tertiary was 81.50%.Resistance factors of the order of 2 are usual values for these processes and the retention of the polymer in the rock of 0.034 mg / g is within the economic margin.io CONGTP González, Esteban 6174 Fernández, Laura 55781 Abrigo, Sergio 55779 Pizarro, Agustín 58699 Prieto, José 58700 Congreso de Exploración y Desarrollo de Hidrocarburos (10mo. : 2018 nov. 5 - 9 : Mendoza) 573 Simposio de Desarrollo de Hidrocarburos (2018 nov. 5 - 9 : Mendoza) 692 Poliacrilamidas 58701 Surfactantes 39905 192792 192792 https://biblioteca.iapg.org.ar/ArchivosAdjuntos/Conexplor2018/SDH/1680.pdf 0 0 0 0 260511 CBAAB CBAAB 068.82 553.28 C62 2018 0015650 2026-03-06 200065095 0 068.82 553.28 C62 2018 0015650 200065095 2026-03-06 00:37:11 2026-03-06 CONGTP