The Comprehensive Evaluation on the Integral Development of Volcanic Gas Reserves and CO2 Flooding in Jilin Oil Field

2013 ◽  
Author(s):  
Xu Qing ◽  
Ran Qiquan ◽  
Song Wenli ◽  
Chen Guoli ◽  
Xiang Dong ◽  
...  
Keyword(s):  
Comprehensive Evaluation ◽  
Oil Field ◽  
Co2 Flooding ◽  
Volcanic Gas ◽  
Integral Development

Evaluation of a Composite Flooding Formula Used to Enhance the Oil Recovery of Ansai Oil Field

2020 ◽  
Vol 984 ◽  
pp. 183-188
Author(s):  
Rong Jun Zhang ◽  
Xiao Ke Wang ◽  
Jin Lin Zhao ◽  
Zheng Peng Zhou ◽  
Gang Chen
Keyword(s):  
Interfacial Tension ◽  
Oil Recovery ◽  
Comprehensive Evaluation ◽  
High Surface ◽  
Evaluation Criteria ◽  
Oil Field ◽  
Chemical Flooding ◽  
Surfactant Flooding ◽  
Technical Requirements ◽  
Viscoelastic Surfactant

The composite flooding formula utilizes the characteristics of polymer flooding and surfactant flooding to compensate for the shortage of single component chemical flooding, reduce the oil-water interfacial tension to a certain extent, and broaden the maintenance range of low interfacial tension. The combined effects and synergies in the oil displacement process enhance oil recovery and allow it to adapt to a wider range of reservoir conditions. In this paper, the high surface active polymer-surfactant flooding formula suitable for the Chang 6 reservoir in Ansai Oilfield was evaluated. The general technical index of the viscoelastic surfactant fracturing fluid and the composite flooding surfactant were evaluated. The technical requirements are evaluation criteria, and comprehensive evaluation is made from several aspects such as salt tolerance, interfacial tension and emulsifying properties.

Development of a Correlation Between Performance of CO2 Flooding and the Past Performance of Waterflooding in Weyburn Oil Field

2007 ◽  
Vol 22 (02) ◽  
pp. 260-264 ◽  
Author(s):  
Koorosh Asghari ◽  
Mingzhe Dong ◽  
Jessie Shire ◽  
Tom Jordan Coleridge ◽  
Janelle Nagrampa ◽  
...  
Keyword(s):  
Oil Field ◽  
Co2 Flooding ◽  
Past Performance ◽  
The Past

Optimize Oil Field Simulation Measures through Multi-Factor Comprehensive Evaluation Method Based on Fuzzy Mathematics and Grey Correlation

2012 ◽  
Vol 524-527 ◽  
pp. 1503-1506
Author(s):  
Zhi Kun Liu ◽  
Qi Li ◽  
Shao Xiang Zhang
Keyword(s):  
Evaluation Method ◽  
Comprehensive Evaluation ◽  
Fuzzy Comprehensive Evaluation ◽  
Oil Field ◽  
Gray Relational Analysis ◽  
Fuzzy Mathematics ◽  
Field Stimulation ◽  
Comprehensive Evaluation Method ◽  
Relational Analysis ◽  
The One

This paper adopts the multi-factor comprehensive evaluation method combining fuzzy mathematics and gray relational analysis to conduct oil field stimulation measures optimization. It overcomes the one-sidedness of the man-made assignment through the replacing correlation of ray correlation analysis with weight set of fuzzy comprehensive evaluation. The paper first analyzed the factors that affect the oil field stimulation measures, and then created a multi-factor comprehensive evaluation theoretical model, finally based on the instance to evaluate the model. The results show that the method is feasible and has high application value.

Development of a Correlation Between Performance of CO2 Flooding and the Past Performance of Waterflooding in Weyburn Oil Field

2006 ◽  
Author(s):  
Koorosh Asghari ◽  
Mingzhe Dong ◽  
Jessie Shire ◽  
Tom Coleridge ◽  
Janelle Nagrampa ◽  
...  
Keyword(s):  
Oil Field ◽  
Co2 Flooding ◽  
Past Performance ◽  
The Past

scholarly journals Asphaltene Deposition during CO2 Flooding in Ultralow Permeability Reservoirs: A Case Study from Changqing Oil Field

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Li Rong-tao ◽  
Liao Xin-wei ◽  
Zou Jian-dong ◽  
Gao Chang-wang ◽  
Zhao Dong-feng ◽  
...  
Keyword(s):  
Adverse Effects ◽  
Injection Rate ◽  
Oil Field ◽  
Formation Damage ◽  
Co2 Flooding ◽  
Asphaltene Precipitation ◽  
Asphaltene Content ◽  
Asphaltene Deposition ◽  
Ultralow Permeability

Asphaltene deposition is a common phenomenon during CO2 flooding in ultralow permeability reservoirs. The deposited asphaltene occupies the pore volume and decreases permeability, resulting in serious formation damage and pore well productivity. It is urgent to investigate the asphaltene deposition mechanisms, adverse effects, and preventive measures. However, few asphaltene deposition investigations have been systematically conducted by now. In this research, the asphaltene precipitation mechanisms and adverse effects were comprehensively investigated by using experimental and numerical methods. To study the effects of pressure, asphaltene content, and temperature on asphaltene precipitation qualitatively and quantitatively, the microscope visible detection experiment and the PVT cell static experiment were firstly conducted. The adverse effects on porosity and permeability resulted from asphaltene deposition were also studied by the core flooding experiment. Secondly, simulation models of asphaltene precipitation and deposition were developed and validated by experimental data. Finally, a case study from Changqing oil field was presented to analyze the asphaltene deposition characteristic and preventive measures. The experimental results showed that the asphaltene precipitation increases with the increased pressure before reaching the minimum miscible pressure (MMP) and gets the peak value around the MMP, while decreases slowly. The asphaltene precipitation increases with the increased temperature and asphaltene content. The variation trend of adverse effects on porosity and permeability resulted from asphaltene deposition is similar to that of asphaltene precipitation under the influence of pressure, asphaltene content, and temperature. The case study shows that the water-altering-gas (WAG) with high injection rate suffers more serious asphaltene deposition compared with the WAG with low injection rate, for the asphaltene precipitation increases as the increased pressure before reaching the MMP. The CO2 continuous injection with high injection rate is the worst choice, for low sweep efficiency and the most severe formation damage. Thus, the WAG with optimal injection rate was proposed to maintain well productivity and to reduce formation damage resulted from asphaltene deposition during developing ultralow permeability reservoirs.

scholarly journals Ketone Solvent to Reduce the Minimum Miscibility Pressure for CO2 Flooding at the South Sumatra Basin, Indonesia

Processes ◽  
2020 ◽  
Vol 8 (3) ◽  
pp. 360 ◽  
Author(s):  
Adi Novriansyah ◽  
Wisup Bae ◽  
Changhyup Park ◽  
Asep K. Permadi ◽  
Shabrina Sri Riswati
Keyword(s):  
Interfacial Tension ◽  
Oil Field ◽  
Co2 Flooding ◽  
Reservoir Temperature ◽  
The South ◽  
Chemical Additives ◽  
Co2 Solubility ◽  
High Co2 ◽  
Minimum Miscibility Pressure ◽  
Alcohol Solvents

This paper experimentally analyzes the chemical additives, i.e., methanol and ethanol, as alcohol solvents, and acetone as a ketone solvent, and the temperature influencing the minimum miscibility pressure (MMP) that is essential to design miscible CO2 flooding at an oil field, the South Sumatra basin, Indonesia. The experiments were designed to measure CO2-oil interfacial tension with the vanishing interfacial tension (VIT) method in the ranges up to 3000 psi (208.6 bar) and 300 degrees Celsius. The experiment results show that lower temperatures, larger solvent volumes, and the acetone were effective in reducing MMP. The acetone, an aprotic ketone solvent, reduced MMP more than the methanol and the ethanol in the CO2-oil system. The high temperature was negative to obtain the high CO2 solubility into the oil as well as the lower MMP. The experimental results confirm that the aprotic ketone solvent could be effective in decreasing the MMP for the design of miscible CO2 flooding at the shallow mature oilfields with a low reservoir temperature.

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