Priyanka Juyal

Priyanka Juyal
Nalco Energy Services, An Ecolab Company · Flow Assurance Research (Ultradeep Water)

Ph.D

About

25
Publications
3,385
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707
Citations

Publications

Publications (25)
Chapter
Asphaltenes deposition remains the most challenging flow assurance issue in oil production processes. Asphaltene-related problems such as formation damage, deposition in pipelines, stabilization of water-in-oil emulsions, and catalyst deactivation are the results of asphaltene structure, crude oil composition and operating conditions. In this chapt...
Article
Asphaltenes, among the most complex components in crude oil, vary in their molecular structure, composition, and self assembly in porous media. This complexity makes it a challenge in laboratory characterization methods. In the present work, a novel microfluidic device was designed to access in-situ transient, high-fidelity information on asphalten...
Article
Precipitation of calcium naphthenate soaps from acidic crude oils poses significant operational challenges. Calcium naphthenate deposition in oil fields results from the interaction of family of special polycyclic tetracarboxylic acids known as ARN acids with divalent metal ions (Ca2+) present in produced water. Calcium naphthenate scaling is being...
Article
Lithium cationization can significantly extend the compositional range for analysis of petroleum components by positive electrospray ionization [(+) ESI], by accessing species that lack a basic nitrogen atom and, hence, are not seen by conventional (+) ESI that relies on protonation as the primary ionization mechanism. Here, various solvent composi...
Article
Silver cationization constitutes a complementary approach for analysis of petroleum components with positive-ion electrospray ionization (ESI) mass spectrometry and accesses species that lack a basic nitrogen atom and, hence, are not observed by conventional positive ESI. Four samples of different origin [Canadian bitumen, Canadian bitumen heavy va...
Article
Ultrahigh-resolution Fourier transform ion cyclotron resonance mass spectrometry (FTICR MS) enables the direct characterization of complex mixtures without prior fractionation. High mass resolution can distinguish peaks separated by as little as 1.1 mDa), and high mass accuracy enables assignment of elemental compositions in mixtures that contain t...
Article
Molecular characterization of asphaltenes by conventional analytical techniques is a challenge because of their compositional complexity, high heteroatom content, and asphaltene aggregate formation at low concentrations. Thus, most common characterization techniques rely on bulk properties or solution-phase behavior (solubility). Proposed over 20 y...
Article
An alternative method to extract, quantify, and characterize water-soluble organic (WSO) species in produced water from steam-assisted gravity drainage (SAGD) is evaluated by various techniques. Here, we use a 70:30 mixture of cyclohexane/butyl acetate as the solvent for extraction of WSO species from produced water. The ability of the 70:30 cycloh...
Article
Here, we present a case study on a Wyoming well with known asphaltene deposition issues as a result of natural depletion. Field deposits and crude oil from the same well were collected for analysis. Compositional differences between field deposits, lab-generated capillary deposits, and C7-precipitated asphaltenes were determined by Fourier transfor...
Article
Restabilization of asphaltenes after they precipitate out in the production systems can be of great industrial significance with respect to remediation. Here, we discuss the redispersion of asphaltenes in the hydrocarbon phase aided by treatment chemicals in the laboratory using the asphaltene dispersancy test (ADT), Turbiscan, and modified ADT met...
Article
A platform in the Campos Basin of Brazil experienced paraffin deposition issues in the inner-field flowline. The paraffin deposition rate was relatively low; however the deposited wax was hard and very sticky making pigging of the line difficult. Comprehensive advanced analyses and characterization of the crude oil and the deposit were conducted to...
Article
Full-text available
Aging refers to the deterioration of hydrocarbon fluids that manifests as changes in the physicochemical characteristics of the fluid upon exposure to ambient conditions. In order to understand the effect of aging of crude oils on asphaltene inhibitor product recommendation, simulated aging studies were performed on a crude oil from Wyoming with kn...
Article
For live oils, the effect of pressure (amount of dissolved gas) on the wax appearance temperature (WAT) can be quite pronounced. Here, we describe the use of high-pressure micro-differential scanning calorimetry (HP-μDSC) as an effective technique to determine the WAT for live oils. The effect of increasing equilibration time on WAT is described an...
Article
We describe the detailed analysis and characterization of an unusual blue crude oil and a deposit from the monoethylene glycol (MEG) regeneration unit (MRU) on an offshore crude oil production platform. To characterize the deposit and the components in the crude oil that give it such a distinct blue hue, we investigated the samples with comprehensi...
Article
Organic solid deposition control (OSDC) is a live oil test capable of simulating the production conditions of oil streams and can generate asphaltene deposits under production system conditions. OSDC can also simulate gas lift conditions because the producers are looking for artificial lift methods to produce oil from low-energy reservoirs. In this...
Conference Paper
Many oilfield operators face flow assurance challenges associated with the deposition of naphthenate solids and formation of sodium soaps in production equipment. Calcium and sodium naphthenates are respectively solid deposits and emulsions formed by the interaction of naphthenic acids with divalent (Ca2+, Mg2+) or monovalent (Na+, K+) ions in prod...
Conference Paper
Water and oil emulsions are problematic in the petroleum industry due to the associated production losses and cost of breaking the emulsions with chemical additives. Previous high resolution mass spectrometric results have suggested that the acidic portion of interfacial material (IM) is enriched in specific Ox and SOx species relative to the paren...
Conference Paper
Crude oil compound classes that are not sufficiently acidic or basic to yield simple protonation/deprotonation with dilute weak acids and bases are not efficiently ionized by electrospray ionization. However, reagents/solvent systems that can react with nitrogen, sulfur and oxygen in near-neutral species without major alterations in the molecular s...
Article
Molecular characterization of sulfur-containing species in petroleum is important because sulfur-containing compounds are detrimental to the environment and the refining processes. In a recent report, the sulfur-containing compounds in a vacuum bottom residue (VBR) were methylated to enhance their detectability by electrospray ionization (ESI) mass...
Article
Asphaltenes are naturally occurring components of crude oil and have been the subject of many studies that have involved a variety of methods to determine their complex structure, their association in crude oil with resins, and their agglomeration phenomena. Yet, the molecular structures of asphaltenes have not been fully elucidated. It is especial...
Article
Different N-substituted derivatives of urea, thiourea and guanidine have been synthesised and characterised for structural information by FT-IR and 13C NMR spectroscopy. Accelerated stability tests have been done to evaluate their sediment inhibition and dispersant characteristics on distillate fuels containing high proportions of unstable componen...
Article
Alkylamino derivatives of different N-Heterocyclic systems like the azoles, azines and piperazines have been synthesized and characterized for structural information by FT-IR and C NMR spectroscopy. Accelerated stability tests have been done to evaluate their sediment inhibition and dispersant characteristics on distillate fuels containing high pro...
Article
This paper summarizes the synthesis of some amino acid esters and their derivatives. The structural characteristics of these derivatives have been studied by IR, H and C NMR spectroscopy. Evaluation of their efficacy with respect to gum and sediment inhibition and dispersant characteristics in highly unstable distillate fuel blends has been carried...
Article
Nine different derivatives of alkyloxy alkylamino propanols were synthesised from epichlorohydrin, straight or branched chain primary and secondary alcohols and tertiary alkyl primary amines as well as straight chain primary amine. Their sedimentation inhibition characteristics in distillate fuels of various compositions were studied in comparison...

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