Asphaltenes represent the heaviest and most polar fraction of crude oil. The interaction asphaltenes with other fractions oil can affect its overall polarity stability. Because complex nature molecules constituting asphaltenes, determining asphaltenes—and, thereby, predicting their stability—is, however, difficult. A more practical way to estimate instability would have important implications in production performance. In this study, we present a method combining dielectric constant...

Complex molecular structure, high impurity content, and self-association tendency of asphaltenes make the determination their phase behavior very difficult. Because asphaltene is indicative stability within bulk oil, it important to understand its stability. Various production flow assurance challenges related precipitation unstable can be prevented by proper comprehension This study provides a data set on 11 different asphaltenes, which helps us complicated nature components crude oils that...

Molecular dynamics simulations have been employed to investigate the effect of molecular polydispersity on aggregation asphaltene. To make large combinatorial space possible asphaltene blends accessible a systematic study via simulation, an upfront unsupervised machine-learning approach (clustering) was identify reduced set model molecules representative diversity For these molecules, single shown broad range behaviors, driven by their structural features: size aromatic core, length...

Abstract Changing thermodynamic and compositional conditions of producing fields can cause decreased asphaltene stability initiate aggregation, subsequent precipitation, eventual deposition within flowlines. Usage inhibitors that prevent aggregation tackle the problem right at inception is widely preferred. However, such chemistries were observed to be counter-productive led higher in many cases. Thus, raising question what approach works best for assessing stability: Dispersion or...

Abstract Asphaltenes and resins are the polar saturates aromatics nonpolar fractions of crude oil. The mutual interaction within oil results in different overall polarity. With onset asphaltene precipitation, polarity starts to change drastically this affects stability more. This study investigates their individual impact on precipitation. Two samples with content, API gravity, viscosity were divided into Saturates, Aromatics, Resins, (SARA) fractions. oils SARA characterized by Fourier...

Summary Asphaltenes precipitation within reservoir pores or production flowlines can severely hamper the petroleum-extraction process. Although effect of temperature and pressure on asphaltene deposition is well-known, manner in which variations oil composition affect asphaltenes-precipitation mechanism requires more clarity. This work investigates crude-oil compositional change stability. The impact analyzed by preparing pseudocomponents through blending crude with their own saturates...

Abstract The in-situ combustion (ISC) is highly effective thermal enhanced oil recovery process in which high displacement efficiencies can be accomplished. While several physical and chemical factors affect the ISC performance, there a little knowledge about how each parameter changes fate. In this study, we investigate catalytic effect of clay on different crude types. Six one-dimensional tube experiments were conducted three samples; one from Mexico two Alberta, Canada. behavior sample...

Abstract Significant effort has been dedicated to understand the variables affecting asphaltene precipitation. Based on years of research, it is well known how such as temperature and pressure can affect deposition asphaltenes. However, much less understood about effect that characteristics have tendency towards precipitation different crude oils. We characterize extensively a series n-pentane extracted asphaltenes construct novel correlations with stability their corresponding 11 bitumen...

Abstract Asphaltene precipitation can severely hamper the petroleum extraction by plugging pores or in production lines. Although effect of temperature and pressure on asphaltene deposition is well known, how variations oil composition affect mechanism requires more clarity. This work investigates compositional changes stability. The impact explained preparing pseudo-components blending crude with their own saturate fractions. A systematic characterization 11 different bitumen samples...

We will investigate the effect of temperature on wettability. First, we list and summarize different schools thoughts from previous literature describing wettability changes for sandstone carbonate reservoirs at elevated temperature. Next, describe properties that affect wettability: how they alter are affected by After that, present indications current measurement techniques. Following this, case studies change influences reservoir characteristics field performance during thermal recovery...

Abstract Maintaining overall asphaltene stability is imperative for a successful flow assurance treatment program. However, complex interactions between the polar fraction and other components in crude oil or reservoir minerals makes assessment extremely challenging. These can contribute towards precipitation subsequent deposition of unstable clusters comprising impurities such as paraffin, organics, inorganic mineral composites. This study investigates impact salts on inhibitor performance...

Asphaltenes represent the most polar solubility fraction of crude oil. The polar-polar interactions between asphaltene-water, asphaltene-clay, or asphaltene-asphaltene molecules can cause severe flow assurance issues in oilfield such as formation highly stable emulsion, pore-throat blockages within reservoir, and plugging production transportation flowlines. A novel approach understanding these through thermo-electric measurements is presented this study, which evaluate overall asphaltene...

Abstract Organic deposition formed at high temperatures in oil and gas production systems is commonly linked to instability of asphaltenes. Recent studies revealed that deposits collected offshore wells produced Gulf Mexico exhibited compositional variation pointing a more complex fouling process than solely related the asphaltene fractions. To better understand mechanism external factors could contribute this precipitation, crude oils their respective from field were characterized for...

Summary The stability of asphaltenes in crude oil is influenced by various factors, including interactions with reservoir components such as brine and rock formations. While previous research has focused on pressure temperature effects, a comprehensive understanding the combined impact asphaltene lacking. This study investigates individual influences formations stability. First, 11 samples from diverse locations were characterized using API gravity, viscosity, saturates, aromatics, resins,...

Abstract Recent studies revealed that solids from lab-generated deposits often exhibit compositional differences those of field deposits, pointing to a more complex fouling process in operations. The objective this work was understand and apply knowledge deposit characteristics order design conduct laboratory experiments which yield solid with comparable fingerprints. This approach allows reliable product development recommendation strategy be adopted for increased success the applications....

Asphaltenes represent a highly polar component of crude oil, insoluble in n-alkanes and soluble aromatic solvents. The interactions between asphaltene-water, asphaltene-clay, or asphaltene-asphaltene molecules can cause severe flow assurance issues an oil field. Such could lead to pore-throat blockages within the reservoir plugging production transportation flowlines. To overcome these issues, it is necessary first understand overall stability dispersancy state asphaltenes native crude. Most...

Abstract Changing thermodynamic and compositional conditions of producing fields can cause decreased asphaltene stability initiate aggregation, subsequent precipitation, eventual deposition within flowlines. Usage inhibitors that prevent aggregation tackle the problem right at inception is widely preferred. However, such chemistries were observed to be counter-productive led higher in many cases. Thus, raising question what approach works best for assessing stability: Dispersion or...

Abstract Asphaltene precipitation and deposition is a major flow assurance issue faced by the oil gas industry. The complex nature non-uniform molecular structure of asphaltenes complicates efforts to accurately assess their stability. Moreover, developing test methodologies with strong laboratory-to-field correlation presents additional challenges. focus this study discuss successful validation application novel method for monitoring optimizing performance an asphaltene inhibitor over...

Abstract The importance of obtaining a perfect core petroleum reservoir is undisputed. Despite tremendous advances in coring techniques, some basic problems remain as challenging ever. One these the unconsolidated formations. Most side-wall cores result partially damaged cores, totally or no at all, especially This proposed technique promises to greatly improve recovery, quality and longevity core, thereby resulting much better interpretation. Freezing has long been used preserve on surface,...

Abstract Asphaltene precipitation and deposition is a major flow assurance issue faced by the oil gas industry. The complex nature non-uniform molecular structure of asphaltenes complicates efforts to accurately assess their stability. Moreover, developing test methodologies with strong laboratory-to-field correlation presents additional challenges. focus this study discuss successful validation application novel method for determination monitoring asphaltene stability in Gulf Mexico...

Abstract Changing thermodynamic and compositional conditions of producing fields can cause decreased asphaltene stability initiate aggregation, subsequent precipitation, eventual deposition within flowlines. Usage inhibitors that prevent aggregation tackle the problem right at inception is widely preferred. However, such chemistries were observed to be counter-productive led higher in many cases. Thus, raising question what approach works best for assessing stability: Dispersion or...