Study and Pilot Test of Air Foam Flooding in High Water Cut and Fault Block Reservoirs

2020 ◽  
pp. 3064-3079
Author(s):  
Ping-qi Zhao ◽  
Ran Li ◽  
Hua-xing Zhou ◽  
Yang Zhang ◽  
Li-guo Xing ◽  
...  
Keyword(s):  
High Water ◽  
Pilot Test ◽  
Fault Block ◽  
High Water Cut ◽  
Water Cut ◽  
Foam Flooding

scholarly journals A Novel Assisted Gas–Oil Countercurrent EOR Technique for Attic Oil in Fault-Block Reservoirs

Energies ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 402
Author(s):  
Kang Ma ◽  
Hanqiao Jiang ◽  
Junjian Li ◽  
Rongda Zhang ◽  
Kangqi Shen ◽  
...  
Keyword(s):  
Production Process ◽  
Oil Recovery ◽  
Production Efficiency ◽  
High Water ◽  
Gas Oil ◽  
Fault Block ◽  
High Water Cut Stage ◽  
High Water Cut ◽  
Gas Channeling ◽  
Water Cut

As the mature oil fields have stepped into the high water cut stage, the remaining oil is considered as potential reserves, especially the attic oil in the inclined fault-block reservoirs. A novel assisted gas–oil countercurrent technique utilizing gas oil countercurrent (GOC) and water flooding assistance (WFA) is proposed in this study to enhance the remaining oil recovery in sealed fault-block reservoirs. WFA is applied in our model to accelerate the countercurrent process and inhibit the gas channeling during the production process. Four comparative experiments are conducted to illustrate enhanced oil recovery (EOR) mechanisms and compare the production efficiency of assisted GOC under different assistance conditions. The results show that WFA has different functions at different stages of the development process. In the gas injection process, WFA forces the injected gas to migrate upward and shortens the shut-in time by approximately 50% and the production efficiency improves accordingly. Compared with the basic GOC process, the attic oil swept area is extended 60% at the same shut-in time condition and secondary gas cap forms under the influence of WFA. At the production stage, the WFA and secondary gas cap expansion form the bi-directional flooding. The bi-directional flooding also displaces the bypassed oil and replaced attic oil located below the production well, which cannot be swept by the gas cap expansion. WFA inhibits the gas channeling effectively and increases the sweep factor by 26.14% in the production stage. The oil production increases nearly nine times compared with the basic GOC production process. The proposed technique is significant for the development of attic oil in the mature oil field at the high water cut stage.

Physical Simulation Experiment Research of Air Foam Flooding in Da Gang Oilfield

2014 ◽  
Vol 1073-1076 ◽  
pp. 2335-2344
Author(s):  
Jin Yang Xie ◽  
Lin Sun ◽  
Wan Fen Pu ◽  
Fa Yang Jin ◽  
Song He
Keyword(s):  
Oil Recovery ◽  
Physical Simulation ◽  
High Water ◽  
Variable Parameters ◽  
Injection Speed ◽  
Tertiary Oil Recovery ◽  
Important Means ◽  
High Water Cut ◽  
Water Cut ◽  
Foam Flooding

Air foam flooding is an important means in tertiary oil recovery. As of July 2013, in the case of low recovery degree, Da Gang oilfield has entered high water cut period, thus increasing of recovery is under pressure. This experiment simulated the actual reservoir temperature and pressure, through the establishment of physical model, implemented a series of contrast tests, systematically evaluated four variable parameters, including gas liquid ratio, injection mode, permeability, and injection speed. Experimental results has cleared the effect of variable parameters on air foam flooding, so as to provide guidance for oilfield production.

Preventing Proppant and Formation-Sand Production in High Water Cut, Heavy-Oil Wells: A Field Study from Argentina

2009 ◽  
Author(s):  
Daniel Daparo ◽  
Luis Soliz ◽  
Eduardo Roberto Perez ◽  
Carlos Iver Vidal Saravia ◽  
Philip Duke Nguyen ◽  
...  
Keyword(s):  
Field Study ◽  
Heavy Oil ◽  
High Water ◽  
Oil Wells ◽  
Sand Production ◽  
High Water Cut ◽  
Water Cut
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