Air-Foam-Injection Process: An Improved-Oil-Recovery Technique for Waterflooded Light-Oil Reservoirs

2012 ◽  
Vol 15 (04) ◽  
pp. 436-444 ◽  
Author(s):  
Xiaohu Dong ◽  
Huiqing Liu ◽  
Peng Sun ◽  
Jiapeng Zheng ◽  
Rong Sun
Keyword(s):  
Oil Recovery ◽  
Oil Reservoirs ◽  
Improved Oil Recovery ◽  
Injection Process ◽  
Light Oil ◽  
Recovery Technique ◽  
Light Oil Reservoirs

The Mechanism of Flue Gas Injection for Enhanced Light Oil Recovery

2004 ◽  
Vol 126 (2) ◽  
pp. 119-124 ◽  
Author(s):  
O. S. Shokoya ◽  
S. A. (Raj) Mehta ◽  
R. G. Moore ◽  
B. B. Maini ◽  
M. Pooladi-Darvish ◽  
...  
Keyword(s):  
Oil Recovery ◽  
Flue Gas ◽  
Gas Injection ◽  
Cost Effective ◽  
Air Injection ◽  
Oil Reservoirs ◽  
Flue Gases ◽  
Low Permeability ◽  
Light Oil ◽  
Light Oil Reservoirs

Flue gas injection into light oil reservoirs could be a cost-effective gas displacement method for enhanced oil recovery, especially in low porosity and low permeability reservoirs. The flue gas could be generated in situ as obtained from the spontaneous ignition of oil when air is injected into a high temperature reservoir, or injected directly into the reservoir from some surface source. When operating at high pressures commonly found in deep light oil reservoirs, the flue gas may become miscible or near–miscible with the reservoir oil, thereby displacing it more efficiently than an immiscible gas flood. Some successful high pressure air injection (HPAI) projects have been reported in low permeability and low porosity light oil reservoirs. Spontaneous oil ignition was reported in some of these projects, at least from laboratory experiments; however, the mechanism by which the generated flue gas displaces the oil has not been discussed in clear terms in the literature. An experimental investigation was carried out to study the mechanism by which flue gases displace light oil at a reservoir temperature of 116°C and typical reservoir pressures ranging from 27.63 MPa to 46.06 MPa. The results showed that the flue gases displaced the oil in a forward contacting process resembling a combined vaporizing and condensing multi-contact gas drive mechanism. The flue gases also became near-miscible with the oil at elevated pressures, an indication that high pressure flue gas (or air) injection is a cost-effective process for enhanced recovery of light oils, compared to rich gas or water injection, with the potential of sequestering carbon dioxide, a greenhouse gas.

Experimental Study on the Safety of Exhaust Gas in the Air Injection Process for Light Oil Reservoirs

2016 ◽  
Vol 30 (6) ◽  
pp. 4504-4508 ◽  
Author(s):  
Pengliang Li ◽  
Zhenyi Liu ◽  
Changgen Feng ◽  
Yao Zhao ◽  
Mingzhi Li ◽  
...  
Keyword(s):  
Experimental Study ◽  
Air Injection ◽  
Oil Reservoirs ◽  
Exhaust Gas ◽  
Injection Process ◽  
Light Oil ◽  
Light Oil Reservoirs
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