Recent Progress and Evaluation of ASP Flooding for EOR in Daqing Oil Field

Shutang, Gao; Gao, Qiang

doi:10.2523/127714-ms

Cited by 19 publications

(14 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Although the effect of SP to the oil-water separation have been investigated in the water treatment industry [13][14][15][16][17][18][19], little attention has been given to its effect by specifically using the flotation process. The oil and water separation in the flotation unit with the presence of gas bubbles is a complex process which is not well understood.…”

Section: ■ Introductionmentioning

confidence: 99%

Statistical Modelling of Oil Removal from Surfactant/Polymer Flooding Produced Water by Using Flotation Column

Hani

Ayoub

2020

Indones. J. Chem.

View full text Add to dashboard Cite

The objective of this study was to investigate the effect of polymer and surfactant (MFOMAX) towards the efficiency of oil removal in a flotation column by using the Response Surface Methodology (RSM). Various concentrations of surfactant (250, 372 and 500 ppm) and polymer (450, 670, and 900 ppm) produced water were prepared. Dulang crude oil was used in the experiments. Flotation operating parameters such as gas flow rate (1-3 L/min) and duration of flotation (2-10 min) were also investigated. The efficiency of oil removal was calculated based on the difference between the initial concentration of oil and the final concentration of oil after the flotation process. From the ANOVA analysis, it was found that the gas flow rate, surfactant concentration, and polymer concentration contributed significantly to the efficiency of oil removal. Extra experiments were conducted to verify the developed equation at a randomly selected point using 450 ppm of polymer concentration, 250 ppm of surfactant concentration, 3 L/min gas flowrate and duration of 10 min. From these extra experiments, a low standard deviation of 1.96 was discovered. From this value, it indicates that the equation can be used to predict the efficiency of oil removal in the presence of surfactant and polymer (SP) by using a laboratory flotation column.

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Statistical Modelling of Oil Removal from Surfactant/Polymer Flooding Produced Water by Using Flotation Column

Hani

Ayoub

2020

Indones. J. Chem.

View full text Add to dashboard Cite

show abstract

“…Alkali-surfactant-polymer (ASP) ooding, as a promising chemical EOR technology, has greatly attracted attention in recent years [12][13][14]. For example, the ASP ooding test conducted in Daqing Oil eld con rmed that about 20% additional OOIP was recovered [15]. e ASP ooding mechanism includes the individual mechanism of each of its components and their synergism.…”

Section: Introductionmentioning

confidence: 99%

Development Performance and Pressure Field Evolution of ASP Flooding

Wang

et al. 2020

Advances in Polymer Technology

View full text Add to dashboard Cite

ASP (alkali-surfactant-polymer) is acknowledged as an effective technology to improve the oil recovery. The microscopic displacement efficiency and macroscopic sweep efficiency have been discussed in detail for the past few years. However, development performance, especially pressure characteristics, needs to be further studied. This paper aims to explore the pressure evolution performance during ASP flooding, of which the results will shed light on development characteristics of ASP flooding. The study on ASP flooding pressure field development is conducted by laboratory and numerical methodology. A large sandpack laboratory model with vertical heterogeneous layers is used to monitor pressure performance during the ASP flooding. With the help of interpolation methods, a precise and intuitive pressure field is obtained based on pressure data acquired by limited measurement points. Results show that the average formation pressure and its location are changing all the time in the whole process. In addition, the influence of heterogeneity and viscosity on recovery and pressure is also probed in this paper. We built a numerical simulation model to match the experiment data considering the physical and chemical alternation in ASP flooding. Also, response surface methodology (RSM) is adopted to obtain the formula between pressure functions and influencing factors.

show abstract

“…[1][2]10,19] In addition, several ASP field tests have confirmed that residual oil can be displaced using alkaline-surfactant-polymer [6,15] The most well-known tests have been done on the Daqing oil field with an incremental enhanced oil recovery of 20 % compared to waterflooding performance. [20] Although chemical-assisted waterflooding has been applied since the early 20 th century, it was not until recently that the applicability of this process for recovery of heavy oil using preliminary macro-scale as well as pore-scale studies was tested. Despite numerous studies reported in this field, there is a lack of attention to the microscopic and macroscopic efficiency of ASP flooding in fractured heavy oil systems.…”

Section: Introductionmentioning

confidence: 99%

“…Recent research has led to the development of surfactant systems suitable for high salinity and carbonate environments . In addition, several ASP field tests have confirmed that residual oil can be displaced using alkaline‐surfactant‐polymer The most well‐known tests have been done on the Daqing oil field with an incremental enhanced oil recovery of 20 % compared to waterflooding performance . Although chemical‐assisted waterflooding has been applied since the early 20 th century, it was not until recently that the applicability of this process for recovery of heavy oil using preliminary macro‐scale as well as pore‐scale studies was tested.…”

Section: Introductionmentioning

confidence: 99%

Heavy oil recovery using ASP flooding: A pore‐level experimental study in fractured five‐spot micromodels

et al. 2016

View full text Add to dashboard Cite

Although alkaline-surfactant-polymer (ASP) flooding has proven efficient for heavy oil recovery, the displacement mechanisms and efficiency of this process should be discussed further in fractured porous media. In this study, several ASP flooding tests were conducted in fractured glass-etched micromodels with a typical waterflood geometrical configuration, i.e. five-spot injection-production pattern. The ASP flooding tests were conducted at constant injection flow rates but different fracture geometrical characteristics. The ASP solutions consisted of five polymers, two surfactants, and three alkaline types. It was found that using synthetic polymers, especially hydrolyzed polyacrylamide with high molecular mass, as well as cationic surfactant increases the ultimate recovery. The location of the injection well with respect to the fracture system plays a significant role in the ASP flooding performance, i.e. an increase in the angle associated with the longitudinal extension of fractures with respect to the main flow direction resulted in enhanced oil recovery and also postponed the wetting phase breakthrough time. Mechanistic study of this displacement process revealed that dispersive and diffusive behaviour of the ASP front enhanced the fluid transport from fracture to matrix and increased the microscopic displacement efficiency. Emulsification and coalescence mechanisms were responsible for ASP frontal advancement. Residual oil in the invaded region, which was observed in the form of discontinuous oil ganglia dispersed in the invaded pore bodies or in the form of pendular bridges formed around some of the solid particles, was mobilized in the form of oil wads through the droplets of the displacing phase.

show abstract

Recent Progress and Evaluation of ASP Flooding for EOR in Daqing Oil Field

Cited by 19 publications

References 0 publications

Statistical Modelling of Oil Removal from Surfactant/Polymer Flooding Produced Water by Using Flotation Column

Statistical Modelling of Oil Removal from Surfactant/Polymer Flooding Produced Water by Using Flotation Column

Development Performance and Pressure Field Evolution of ASP Flooding

Heavy oil recovery using ASP flooding: A pore‐level experimental study in fractured five‐spot micromodels

Contact Info

Product

Resources

About