Polymers for EOR Application in High Temperature and High Viscosity Oils: Rock–Fluid Behavior

Energies

RubénH. Castro¹  HendersonI. Quintero¹  Eduardo Manrique¹  Jenny Rodríguez²  Sebastián Llanos² 

[1] Ecopetrol S.A.—Instituto Colombiano del Petróleo (ICP), Vía Piedecuesta Km.7, Piedecuesta 681012, Colombia;Escuela de Ingeniería de Petróleos—Universidad Industrial de Santander (UIS), Carrera 27 Calle 9, Bucaramanga 680002, Colombia;

关键词: enhanced oil recovery (EOR);    scleroglucan (SG);    sulfonated polyacrylamide (ATBS);    RF;    RRF;    oil displacement;   

DOI  :  10.3390/en13225944

来源: DOAJ

【 摘 要 】

Viscosity losses and high degradation factors have a drastic impact over hydrolyzed polyacrylamides (HPAM) currently injected, impacting the oil recovery negatively. Previous studies have demonstrated that biopolymers are promising candidates in EOR applications due to high thermochemical stability in harsh environments. However, the dynamic behavior of a biopolymer as scleroglucan through sandstone under specific conditions for a heavy oil field with low salinity and high temperature has not yet been reported. This work presents the rock–fluid evaluation of the scleroglucan (SG at 935 mgL⁻¹) and sulfonated polyacrylamide (ATBS at 2500 mgL⁻¹) to enhance oil recovery in high-temperature for heavy oils (212 °F and total dissolved solid of 3800 mgL⁻¹) in synthetic (0.5 Darcy) and representative rock samples (from 2 to 5 Darcy) for a study case of a Colombian heavy oilfield. Dynamic evaluation at reservoir conditions presents a scenario with stable injectivity after 53.6 PV with a minimal pressure differential (less than 20 psi), inaccessible porous volume (IPV) of 18%, dynamic adsorption of 49 µg/g, and resistance and residual resistance factors of 6.17 and 2.84, respectively. In addition, higher oil displacement efficiency (up to 10%) was obtained with lower concentration (2.7 times) compared to a sulfonated polyacrylamide polymer.

【 授权许可】

Unknown