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Hybrid thermal-solvent process

Thermal Methods, Page: 217-243
2023
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Book Chapter Description

Heavy oil and bitumen have about 67% of crude oil resources worldwide. Already some techniques of thermal enhanced oil recovery (TEOR), such as steam-assisted gravity drainage (SAGD) and solvent vapor extraction (VAPEX), have been utilized in heavy oilfields. Last two decades, a new technique has been presented to achieve the privileges of the SAGD and VAPEX processes called the hybrid thermal-solvent process. Based on the injection procedure, the hybrid thermal-solvent process can be divided into expanding solvent-assisted gravity drainage (ES-SAGD), liquid addition to steam for enhanced recovery (LASER), steam alternating solvent (SAS), solvent enhanced steam flooding (SESF) or solvent-aided process (SAP), and alkaline steam flooding. In this chapter, each hybrid thermal-solvent process is introduced, and its crucial mechanisms is evaluated. Then, modeling and simulation are studied, and critical parameters in procedure selection are discussed. Finally, some field implementations of the hybrid thermal-solvent process are presented.

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