Chemical EOR

Modeling Chemical EOR Processes: Some Illustrations from Lab to Reservoir Scale

Modeling Chemical EOR Processes: Some Illustrations from Lab to Reservoir Scale — Chemical flooding, SP (Surfactant Polymer) or ASP (Alkali-Surfactant-Polymer), are of increasing interest due to the need to increase oil production. Design of chemical processes is very project specific and requires case by case studies including various steps among which reservoir data analysis, chemical formula...

SPE 146840 Pilot Testing Issues of Chemical EOR in Large Fractured Carbonate Reservoirs

Many world class large carbonate reservoirs leave behind at least half of the initial oil in place. Typically water injection is used to improve oil recovery while gas injection is used to maintain pressure or to promote oil gravity drainage. Immiscible gas injection, including injection of CO2, has been considered but not implemented on a large scale for economic reasons. Furthermore, interest...

Recent Advances in Surfactant EOR

Magnetic Resonance Imaging of Chemical EOR in Core to Complement Field Pilot Studies

Before possible multi-well pilots and full field-scale implementation, chemical enhanced oil recovery (EOR) projects usually follow an incremental screening procedure from the laboratory through single-well pilots. Laboratory-scale core floods at reservoir conditions validate surfactant performance before committing to field trials. However, in single short plugs, volumetric averages do not cor...

Emulsion Formation for EOR Applications

In this study, the oil recovery potential of Smart Water in the Danish sector of the North Sea chalk reservoirs was investigated. A series of flooding experiments were conducted at reservoir conditions, and a spontaneous imbibition test was carried out at reservoir temperature. Reservoir cores were used along with crude oil samples from the North Sea and representative synthetic formation water...