Effect of sodium fluosilicate particles in acidification flowback fluid on emulsification stability of crude oil

Bai, Yujie; Cao, Guangwen; Nan, Xiaohan; Li, Shining; An, Hongxin; Wang, Xin; Wang, Zhe

doi:10.1016/j.petrol.2021.108484

Cited by 14 publications

(7 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The flexural compressive strength of 1% microcapsules is 2% to 5% higher than that of ordinary mortar. The addition of microcapsules also involves a small amount of fluosilicate curing agent, which has a certain strengthening effect on cement-based materials when the dosage is low [40]. The microcapsule also contains a certain amount of cellulose, which is likely to be decomposed into sugars in the process of high-temperature drying.…”

Section: Mechanical Properties Of Microcapsule-based Self-healing Cementitious Composites 41 Effects Of Microcapsule Content On Compressimentioning

confidence: 99%

Preparation and Mechanical Properties of Microcapsule-Based Self-Healing Cementitious Composites

et al. 2021

View full text Add to dashboard Cite

Self-healing concrete designs can protect against deterioration and improve durability. However, there is no unified conclusion regarding the effective preparation and mechanical properties of self-healing concrete. In this paper, microcapsules are used in cement-based materials, the reasonable dosage of microcapsules is determined, and the self-healing performance of the microcapsule self-healing system under different curing agents is explored. The microcapsules and curing agent are shown to enhance the flexural and compressive strength of mortar specimens at relatively low contents. The optimal microcapsule content in terms of compressive strength is 1–3%. When the content of the microcapsule reaches 7%, the strength of the specimen decreases by approximately 30%. Sodium fluorosilicate is better-suited to the microcapsule self-healing cement-based system than the other two fluorosilicates, potassium fluorosilicate and magnesium, which have similarly poor healing performance as curing agents. Healing time also appears to significantly influence the microcapsule self-healing system; mortar specimens that healed for 28 days are significantly higher than those that healed for 7 days. This work may provide a valuable reference for the design and preparation of self-healing cementitious composite structures.

show abstract

Section: Mechanical Properties Of Microcapsule-based Self-healing Cementitious Composites 41 Effects Of Microcapsule Content On Compressimentioning

confidence: 99%

Preparation and Mechanical Properties of Microcapsule-Based Self-Healing Cementitious Composites

et al. 2021

View full text Add to dashboard Cite

show abstract

“…However, there have been few studies on the effect of higher valence cations, especially the universal Fe(III) species (Fe 3+ and its hydrolysates) in stratum water, on the emulsion stability. In addition, in recent years, with the extensive use of acid fracturing in the oilfield, the flowback acid oil is seriously emulsified and the demulsification is more difficult . This not only causes great trouble in the field treatment but also causes great economic losses to the oilfield enterprises.…”

Section: Introductionmentioning

confidence: 99%

“…This not only causes great trouble in the field treatment but also causes great economic losses to the oilfield enterprises. Compared with the conventionally produced fluid, the pH of the acid flowback fluid is lower, resulting in a larger amount of Fe(III) species due to the acid corrosion of metal pipes, which further improves the emulsification of the flowback fluid, leading to a more complex demulsification. , Therefore, it is essential to study the effect of Fe(III) species on the emulsion stability.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with the conventionally produced fluid, the pH of the acid flowback fluid is lower, resulting in a larger amount of Fe(III) species due to the acid corrosion of metal pipes, which further improves the emulsification of the flowback fluid, leading to a more complex demulsification. 19,20 Therefore, it is essential to study the effect of Fe(III) species on the emulsion stability. Due to a lack of investigations on the effect of Fe(III) species on the stability of emulsions emulsified by an anionic surfactant, sodium dodecyl benzenesulfonate (SDBS), a common surfactant in oilfields, was used as an emulsifier in this work.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Fe(III) Species on the Stability of a Water-Model Oil Emulsion with an Anionic Sulfonate Surfactant as an Emulsifier

Zheng

Wang

et al. 2022

ACS Omega

View full text Add to dashboard Cite

The stability of an emulsion has an important effect on enhancing oil recovery. However, the effect of ions with different valences on the stability of the emulsion emulsified by an ionic surfactant is not fully understood. In this study, the effects of Fe(III) species on the stability, microscopic morphology of droplets, interfacial properties, and rheological properties of water-model oil emulsions emulsified by sodium dodecyl benzenesulfonate (SDBS) were explored. The effect of Fe(III) species on the stability of a W/O crude oil emulsion was also explored. The stability experiment results show that the addition of the Fe(III) species impairs the stability of the model oil-in-water (O/W) emulsion, in which the O/W model oil emulsion is inverted to a water-in-model oil (W/O) emulsion at ∼99 ppm. With the increase of Fe(III) species concentration, stable W/O model oil and W/O crude oil emulsions are obtained. The rheological results indicated that the existence of the Fe(III) species has a remarkable effect on the viscosity and viscoelastic behaviors of the water-model oil emulsion. The calculation results based on Derjaguin−Landau−Verwey−Overbeek (DLVO) theory are in accord with the stability experiment results. Furthermore, the addition of EO groups makes the phase inversion point appear at a higher Fe(III) species concentration, forming a more stable W/O model oil emulsion and a more unstable O/W model oil emulsion. The experimental results are helpful to comprehensively understand the effect of Fe(III) species on the stability of an emulsion emulsified by an anionic sulfonate surfactant, which can help to enhance the oil recovery.

show abstract

“…Lots of reports have reported about the positive effect of inorganic part-injection fluid interaction on improving percolation ability or negative effects on wellbore (Herz-Thyhsen et al, 2021;Xue et al 2018;Zhang et al 2017;Gao and Li 2018;Bai et al 2021). Some reports did mention the negative effects of water occupying pore space by comparing adsorption test under different humidity (Zhu et al 2021;Li et al 2021;Whitelaw et al 2019;Yang 2020); these reports always recognized organic pores by pore diameter, but this method is not accurate especially when there are large organic pores; furthermore, pore size distribution curves acquired by nitrogen adsorption experiments can be influenced by pretreatment including heating, evacuation, and extreme low temperature, and it cannot reveal the absolute value of pore diameter, thus recognizing organic pores by the measured diameter is not convincing.…”

Section: Introductionmentioning

confidence: 99%

Moisture influence on organic pore structure of shale

Ning

Kang

2021

Arab J Geosci

View full text Add to dashboard Cite

In lots of reports, improvement of shale percolation ability by shale-hydration has been reported, some researchers even regard low hydraulic fluid flowback rate as an advantage; they mainly focused on inorganic pores and fractures because brittleness of inorganic minerals decides the fracturing effects, but organic pores occupy large proportion of shale pores. In order to discover the moisture influence on organic pores, we prepare 4 samples by adjusting water content reaching 9.37%, 35.97%, 61.6%, and 80.45% and observe and quantitatively analyze 10,343 pore changes before and after processing of the 4 samples through SEM and image processing software, respectively, meanwhile, match the incremental water invasion rate curve with the dry pore size distribution curve. We also compare the water invasion mass of normal shale sample and organic partially removed sample. This paper first visually observes and counts the influence of hydration on organic shale pores through analysis of pore number, diameter, kurtosis, median, area, and characteristic lengths; discovers hydration and dehydration jointly cause the expected changes; the whole procedure contains two opposite mechanisms, pore closure or deformation caused by squeeze and enlarged pores or newborn fractures caused by water flush. Based on experimental and analysis results, conclusions are drawn that organic pores can be influenced by moisture, water flush and clay hydration expansion work jointly, and water flush function is weak when moisture is low, but it becomes stronger with the sufficient moisture. Therefore, sufficient soak time is beneficial to development.

show abstract

Effect of sodium fluosilicate particles in acidification flowback fluid on emulsification stability of crude oil

Cited by 14 publications

References 11 publications

Preparation and Mechanical Properties of Microcapsule-Based Self-Healing Cementitious Composites

Preparation and Mechanical Properties of Microcapsule-Based Self-Healing Cementitious Composites

Effect of Fe(III) Species on the Stability of a Water-Model Oil Emulsion with an Anionic Sulfonate Surfactant as an Emulsifier

Moisture influence on organic pore structure of shale

Contact Info

Product

Resources

About