scholarly journals Study on Effect Evaluation Method of Weak Gel Flooding Control in Ordinary Heavy Oil Reservoirs

2020 ◽  
Vol 213 ◽  
pp. 02020
Author(s):  
Fachao Shan ◽  
Lun Zhao ◽  
Anzhu Xu ◽  
Bing Bo ◽  
Gang Ma ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Evaluation Method ◽  
Characteristic Curve ◽  
Oil Reservoirs ◽  
Water Flooding ◽  
Effect Evaluation ◽  
Application Range ◽  
Heavy Oil Reservoirs ◽  
Single Well ◽  
Curve Method

Generally the dynamic methods are used to calculate the oil increase after flooding control in the oilfield, but the evaluation results of different methods are quite different, and the evaluation results are uncertain. Therefore, for flooding control well groups in heavy oil reservoirs, the water flooding characteristic curve method, decline method and net oil increase method are used to calculate the oil increase, and the influence of the method parameter values on the results are analyzed, and the parameter value limits and calculation errors of each method are determined. Based on this, the adaptability of each method is proposed. The results show that the effect evaluation of the whole region flooding control is suitable to use the water flooding characteristic curve method or the decline method, the effect evaluation of the single well group flooding control is more suitable to use the decline method, the net oil increase method is not recommended. The application range and parameter value limit of the effect evaluation method of flooding control are put forward, which can guide the actual production effect evaluation in the oilfield.

On hot water flooding strategies for thin heavy oil reservoirs

Fuel ◽  
2015 ◽  
Vol 153 ◽  
pp. 559-568 ◽  
Author(s):  
David W. Zhao ◽  
Ian D. Gates
Keyword(s):  
Heavy Oil ◽  
Hot Water ◽  
Oil Reservoirs ◽  
Water Flooding ◽  
Heavy Oil Reservoirs

Study and Application of EOR on Conventional Heavy Oil Reservoir

2011 ◽  
Vol 236-238 ◽  
pp. 825-828
Author(s):  
Chuan Min Xiao
Keyword(s):  
Heavy Oil ◽  
Oil Reservoirs ◽  
Water Flooding ◽  
Oil Reservoir ◽  
Pilot Test ◽  
Gel Time ◽  
Heavy Oil Reservoirs ◽  
Output Ratio ◽  
Heavy Oil Reservoir ◽  
Displacement Adjustment Method

According to the characters of conventional heavy oil reservoir, liquid and exploitation progress, displacement adjustment method was applied to reduce degression and enhance recovery. The experiment results showed the gel time could be controlled and the strength could be adjusted. The flooding oil rate was more 14.3％ than water flooding in the lab. The pilot test showed that the test effect of moveable gel flooding was significantly good, the accumulated incremental oil production of 6 well groups is 54756t, input-output ratio is 1: 4.1, which shows satisfactory effects in improving the water flooding effect in this conventional heavy oil reservoirs.

Blockage formation in water-flooding heavy oil reservoirs: The distribution rule and the scaling mechanism

2021 ◽  
Vol 33 (8) ◽  
pp. 087108
Author(s):  
Haizhuang Jiang ◽  
Wanli Kang ◽  
Bobo Zhou ◽  
Fang Wang ◽  
Hongbin Yang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Oil Reservoirs ◽  
Water Flooding ◽  
Distribution Rule ◽  
Heavy Oil Reservoirs

scholarly journals Numerical Simulations of Chemical-Assisted Steam Flooding in Offshore Heavy Oil Reservoirs after Water Flooding

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Wei Zheng ◽  
Tingen Fan ◽  
Xianhong Tan ◽  
Weidong Jiang ◽  
Taichao Wang ◽  
...  
Keyword(s):  
Heavy Oil ◽  
Oil Reservoirs ◽  
Water Flooding ◽  
Bohai Bay ◽  
Liquid Ratio ◽  
Thermal Methods ◽  
Foaming Agent ◽  
Steam Flooding ◽  
Nitrogen Foam ◽  
Heavy Oil Reservoirs

Chemical-assisted steam flooding (CASF) is a promising method for heavy oils. However, few researches have investigated the CASF performance on offshore heavy oil reservoirs recovery after water flooding. In this study, a numerical simulation model was developed to simulate CASF processes for offshore heavy oil reservoirs after water flooding. Then, a comparison of CASF and various thermal methods was made to assess the feasibility of CASF in an offshore heavy reservoir of Bohai Bay, China. Finally, sensitivity analysis was performed to evaluate the effects of the gas-liquid ratio, foaming agent concentration, surfactant concentration, the size of nitrogen foam slug, the size of surfactant slug, and the number of chemical injection round on CASF performance by the developed model. The results showed that the developed numerical method can precisely simulate the CASF processes. CASF is a potential and effective method for offshore heavy oil reservoirs after water flooding. The most suitable gas-liquid ratio was around 2 : 1 under the simulation conditions. Considering the economic benefit, it is significant to optimize the CASF parameters, such as foaming agent concentration, the size of nitrogen foam slug, and the number of chemical injection round.

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