Factors influencing the stability of natural gas foam prepared by alkyl polyglycosides and its decay rules

Wen, Yiping; Lai, Nanjun; Li, Wenhong; Zhang, Yongqiang; Du, Zhaofeng; Han, Lijuan; Song, Zhiling

doi:10.1016/j.petrol.2020.108039

Cited by 29 publications

(14 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…27 In addition, the polymer can compete with the surfactant at the interface for adsorption, reducing the surfactant adsorption loss and, thereby, enhancing the stability of the foam in the porous media. 28 According to the classification of gas types, foam can generally be divided into air foam, 29,30 CO 2 foam, 31,32 N 2 foam, 33,34 natural gas foam, 35,36 and the like. Nitrogen is chosen as the gas source for the foam system herein because it is an inert gas, non-toxic, and difficult to burn and has the advantages of an abundant source, high compression coefficient, and significant expansion.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of a Polymer-Enhanced N₂ Foam Performance for Enhanced Oil Recovery

et al. 2023

Self Cite

View full text Add to dashboard Cite

The Bohai oilfield is a typical common heavy oil reservoir with high water cut after long-term water injection development. Considering the characteristics of selective plugging, polymer-enhanced foam (AOS–DYG) flooding was adopted in this study as a subsequent enhanced oil recovery (EOR) technology in the Bohai Sea. A polymer can promote foam stability by reducing the foam drainage rate and enhancing interfacial adsorption behavior. As a result of its low cost and abundant sources, nitrogen is selected as the air source of foam in this paper. The interaction between the polymer DYG and the surfactant AOS was clarified from the aspects of surface adsorption properties, surface dilated rheological properties, bulk phase rheological properties, and micromorphology. That is, the addition of polymer can increase the thickening ability of the foam-based liquid phase, the thickness of the liquid film, and the strength of the gas–liquid interface adsorption layer, all of which dramatically improve the stability of the foam. The core displacement test results further confirmed that the AOS–DYG foam displaced an excellent mobility control ability in porous media. When the foam mass (gas–liquid ratio) was 70% and the injection flow rate was 1 mL/min, the resistance factor and residual resistance factor at 2264.7 mD reached 246.11 and 127.33, respectively. With an increased core permeability, the oil displacement performance of the AOS–DYG foam increased. The enhanced oil recovery (EOR) of the 0.4 PV AOS–DYG foam in the 2547.8 mD core reached 32.19%, demonstrating an outstanding oil displacement capacity. The findings of the investigation supported the potential application of the AOS–DYG foam in EOR.

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of a Polymer-Enhanced N₂ Foam Performance for Enhanced Oil Recovery

et al. 2023

Self Cite

View full text Add to dashboard Cite

show abstract

“…At T = 0 min, the temperature increased from 70 to 90 °C, the quantity of foams changed from 1098 to 1011, and the average particle size expanded from 78. 23 temperature WLM-CO 2 system is significantly more homogeneous than that of the high-temperature system. When the system continues to heat up, the rate of foam generation is inhibited, and under the shearing action of strong external force, considerable portion of the foam tends to be oriented in the direction of flow, causing a precipitous decline in apparent viscosity.…”

Section: Foam Coarsening Behavior Under High Salt Concentrationmentioning

confidence: 95%

“…The average particle size D̅ of the WLM-CO 2 foam can be calculated by formula , where D i is the diameter of a single foam and n is the total number of foams in a fixed field of view. D true̅ = ∑ i = 1 n D i n …”

Section: Experimental Segmentsmentioning

confidence: 99%

“…The average particle size D̅ of the WLM-CO 2 foam can be calculated by formula 1, 23 where D i is the diameter of a single foam and n is the total number of foams in a fixed field of view. The Ostwald ripening rate and the gas molecule diffusion coefficient ratio D diff Ratio of the WLM-CO 2 foam system can be calculated using the calculation model proposed by Lifshitz et al 24 to measure the relative stability of the foam (thermodynamically unstable system).…”

Section: Study On Coarsening Behavior Of the Wlm-co 2 Foammentioning

confidence: 99%

See 1 more Smart Citation

Study on the Stabilization Mechanism of Wormlike Micelle-CO₂ Foams in High-Temperature and High-Salt Oil Reservoirs

Lai

Wang

et al. 2023

Energy Fuels

Self Cite

View full text Add to dashboard Cite

The reservoir environment is complex and variable, and the foam itself is a thermodynamically metastable system. Therefore, the influence of a high-temperature and high-salt reservoir environment on the stability of foams has not been extensively studied in the field of foam flooding. In this study, the influence of high-temperature and high-salt oil reservoir conditions on the stability and stability mechanism of wormlike micelle (WLM)-CO 2 foam systems was explored using foam volume, foam half-life, liquid separation half-life, and foam coarsening behavior as the performance indexes. This goal was achieved by characterizing the foam stability, setting a series of temperatures and salinity in the environment where the foam system is located, and applying statistical methods to intuitively recognize the foam and evaluate the foam effect. In addition, the theory of rheology was used to measure WLM-CO 2 foam system's apparent viscosity and the modulus of energy storage and modulus of loss of foams, and the foam effect was evaluated indirectly. The results showed that the higher the temperature of the WLM-CO 2 foam in the experimental temperature range, the worse the foam stability was. The effect of salinity on the stability of WLM-CO 2 foams is "slightly synergistic, excessively antagonistic". This paper systematically explored the stability law of WLM-CO 2 foams under high-temperature and highsalt reservoir conditions from the microcosmic level and analyzed the attenuation mechanism of the foam by innovative use of rheological theory as to provide a more comprehensive theoretical guidance for the practical application of the WLM-CO 2 foam system in enhanced oil recovery.

show abstract

“…The average bubble diameter and bubble polydispersity can be described by the following formula where d i is the diameter of a single bubble and n is the total number of bubbles in the fixed field of view.…”

Section: Experimental Sectionmentioning

confidence: 99%

Research on the Properties of Natural Gas Foamed Gel as a Profile Control and an Oil Displacement Agent in Strong Heterogeneous Reservoirs

Lai

Yuan

Li³

et al. 2021

Energy Fuels

Self Cite

View full text Add to dashboard Cite

To alleviate the uneven production of extreme heterogeneous reservoirs, we developed a high-strength natural gas foamed gel system by adding a gel system to the foaming agent solution. The Ostwald ripening rate and the gas molecular diffusion coefficient (D diff) were calculated. The number of bubbles, the average diameter(D ad), and the poly-dispersion coefficient (U poly) of the foamed gel system have been considered within, as well as the different temperature, salinity, pressure, and crude oil conditions and the stability of the foamed gel system. Moreover, combining laboratory displacement experiments and core nuclear magnetic (NMR) experiments, the oil displacement ability of natural gas foamed gel was studied. The results showed that different from the previous phenomenon of “defoaming with oil”, adding a certain amount of crude oil into the natural gas foamed gel could improve its foaming performance. According to this phenomenon, we conducted experiments on the stability and viscosity enhancement of the emulsion and explored the stability of the pseudo-emulsion film of foamed gel. In addition, this natural gas foamed gel system had a better ability to control profile and enhance oil recovery when the permeability ratio was 75–150. When the permeability ratio was 150, the low-permeability core diversion rate was about 38%, and the EOR was 35.27%. Finally, the core NMR results showed that the main contribution of water flooding recovery came from macropores. In construct, the recovery efficiency of natural gas foamed gel system mainly came from medium and small pores (effective areas not affected by water flooding). This study would provide a different thought for foam in production while dealing with extreme heterogeneity formations.

show abstract

Factors influencing the stability of natural gas foam prepared by alkyl polyglycosides and its decay rules

Cited by 29 publications

References 41 publications

Experimental Investigation of a Polymer-Enhanced N₂ Foam Performance for Enhanced Oil Recovery

Experimental Investigation of a Polymer-Enhanced N₂ Foam Performance for Enhanced Oil Recovery

Study on the Stabilization Mechanism of Wormlike Micelle-CO₂ Foams in High-Temperature and High-Salt Oil Reservoirs

Research on the Properties of Natural Gas Foamed Gel as a Profile Control and an Oil Displacement Agent in Strong Heterogeneous Reservoirs

Contact Info

Product

Resources

About

Factors influencing the stability of natural gas foam prepared by alkyl polyglycosides and its decay rules

Cited by 29 publications

References 41 publications

Experimental Investigation of a Polymer-Enhanced N2 Foam Performance for Enhanced Oil Recovery

Experimental Investigation of a Polymer-Enhanced N2 Foam Performance for Enhanced Oil Recovery

Study on the Stabilization Mechanism of Wormlike Micelle-CO2 Foams in High-Temperature and High-Salt Oil Reservoirs

Research on the Properties of Natural Gas Foamed Gel as a Profile Control and an Oil Displacement Agent in Strong Heterogeneous Reservoirs

Contact Info

Product

Resources

About

Experimental Investigation of a Polymer-Enhanced N₂ Foam Performance for Enhanced Oil Recovery

Experimental Investigation of a Polymer-Enhanced N₂ Foam Performance for Enhanced Oil Recovery

Study on the Stabilization Mechanism of Wormlike Micelle-CO₂ Foams in High-Temperature and High-Salt Oil Reservoirs