Recovery Observations from Alkali, Nanoparticles and Polymer Flooding as Combined Processes

Polymers

Muhammad Tahir¹  Samhar Saleh²  Magdalena Biernat³  Elisabeth Neubauer³  Rafael E. Hincapie³  Ante Borovina³  Vladislav Arekhov³  Torsten Clemens³ 

[1] Institute of Subsurface Energy Systems, Clausthal University of Technology, Agricolastr. 10, 38678 Clausthal-Zellerfeld, Germany;Montanuniversität Leoben, DPE Department Petroleum Engineering, Franz-Josef-Straße 18, 8700 Leoben, Austria;OMV Exploration & Production GmbH, OMV Upstream Technology & Innovation, New Technology, TECH Center & Lab, 1020 Vienna, Austria;

关键词: polymer flooding;    alkali–polymer flooding;    EOR nanoparticles;    interfacial tension;    wettability alteration;   

DOI  :  10.3390/polym14030603

来源: DOAJ

【 摘 要 】

We have studied wettability alterations through imbibition/flooding and their synergy with interfacial tension (IFT) for alkalis, nanoparticles and polymers. Thus, the total acid number (TAN) of oil may determine the wetting-state of the reservoir and influence recovery and IFT. Data obtained demonstrate how the oil TAN number (low and high), chemical agent and reservoir mineralogy influence fluid–fluid and rock–fluid interactions. We used a laboratory evaluation workflow that combines complementary assessments such as spontaneous imbibition tests, IFT, contact angle measurements and selected core floods. The workflow evaluates wettability alteration, IFT changes and recovery when injecting alkalis, nanoparticles and polymers, or a combination of them. Dynamics and mechanisms of imbibition were tracked by analyzing the recovery change with the inverse bond number. Three sandstone types (outcrops) were used, which mainly differed in clay content and permeability. Oils with low and high TANs were used, the latter from the potential field pilot 16 TH reservoir in the Matzen field (Austria). We have investigated and identified some of the conditions leading to increases in recovery rates as well as ultimate recovery by the imbibition of alkali, nanoparticle and polymer aqueous phases. This study presents novel data on the synergy of IFT, contact angle Amott imbibition, and core floods for the chemical processes studied.

【 授权许可】

Unknown