the colloidal structure of crude oil and the structure

2005-7-1Gelation of the waxy crude oil studied is suggested to be the result of the association between wax crystals which produces an extended network structure and it is shown that the system displays features common to attractive colloidal gels for one of which fumed silica (Aerosil 200) in paraffin oil rheological data are reported 2019-12-5Asphaltene is a component of crude oil that has been reported to cause severe problems during production and transportation of the oil from the reservoir It is a solid component of the oil that has different structures and molecular makeup which makes it one of the most complex components of the oil This research provides a detailed review of asphaltene properties characteristics and

Relationship Between SARA Fractions and Crude Oil

The components were then related to the Colloidal Instability Index (CII) ratios of resins to asphaltenes (R:A) calculated from the SARA values and related to the Solubility Number S BN for each of crude oil These parameters can be used to mitigate crude oil fouling A good correlation between CII and S

Heavy oils and tar mats exploitation transportation and processing are largely affected by their high viscosities that are explained by composition gradients in oil reservoirs [1] These high viscosities are also related to the presence of asphaltene aggregates [2] The extent of aggregation mechanisms could explain the tar mat formation

1998-6-25If a crude oil is buried deeply and for a long time extensive breaking apart of the carbon chains can occur At the same time most of the sulfur compounds in the oil are broken down Therefore an 'old-deep' crude oil has low viscosity low density and very low sulfur content This combination of properties makes the old-deep crudes the most

2009-1-30The elemental composition of a bitumen depends primarily on its crude source and it is difficult to give geographical generalization The data in Table 1 illustrate this fact showing that various materials from the USA or Canada can have quite different compositions The data in Table 1 come from the impressive work on bitumen chemistry structure and properties realized in the USA as

2014-7-2Aggregate Structure in Heavy Crude Oil: Using a Dissipative Particle Dynamics Based Mesoscale Platform Sheng-Fei Zhang † ‡ Li-Li Sun † ‡ Jun-Bo Xu † Hao Wu † and Hao Wen* † †State Key Laboratory of Multi-Phase Complex System Institute of

Wax crystallization and aggregation in a model crude

2005-10-28The paraffinic (wax) component of crude oils is prone to phase separation (crystallization) at low temperature The temperature at which wax crystals first appear as an oil is cooled is defined as the cloud point (CP) or the wax appearance temperature Wax deposits can form on the walls of pipelines where the temperature of the external environment is below the CP a situation commonly

2018-12-19Introduction and Objectives: Increasing energy costs have attracted oil companies to tap into heavy crude oil reserves Heavy crude oil is a colloidal suspension of aggregates of many compounds (resins and asphaltenes) which give rise to very unusual rheological properties such as non-Newtonian behavior and very high viscosity Such high viscosity leads to difficulties in the production

The present invention relates to a kind of crude oil structure of asphaltene image collecting device comprise IMAQ light path IMAQ end high-pressure bottle the petroleum tank that is connected with described high-pressure bottle described petroleum tank is also connected with described distillation water pot by constant-flux pump The present invention drives observation dish to realize

2019-5-25Large sand bodies in the subsurface are shown to provide a unique laboratory for understanding both reservoirs and crude oils Here we treat the discovery by downhole fluid analysis of a gravitational concentration gradient of asphaltenes the most dense component of crude oil in a 2500-ft column of crude oil in the reservoir The continuous trend of crude oil properties across the field

2010-4-1From this point of view olive oil is the main natural edible oil possessing colloidal structure since it is almost unique among vegetable oils that is consumed without any refining process The main aim of this review is to present some new insights given by colloid and interface science concerning the structure of edible natural oils

PALIVA 7 (2015) 2 S 42 - 47 Effect of asphaltenes on structure of paraffin particles in crude oil 43 aliphatic groups promote better result of an asphaltenes-paraffins interaction and better incorporation of asphal-tenes into the crystal structure of alkanes

Large sand bodies in the subsurface are shown to provide a unique laboratory for understanding both reservoirs and crude oils Here we treat the discovery by downhole fluid analysis of a gravitational concentration gradient of asphaltenes the most

Colloidal Structure of Heavy Crudes and Asphaltene Soltutions Structure collodale des bruts lourds et des suspensions d'asphaltnes By as crude oil or other heavy derivatives Density fluctuations were observed for a vacuum residue br L'industrie ptrolire est souvent confronte a des problmes industriels importants lis

Colloidal macrostructure of crude oil studied by

The asphaltenes and heavy oils are known to have a colloidal structure We used small angle neutron and X-ray scattering in order to analyse different suspensions as : * asphaltenes in different solvents and at different temperatures (same conditions for resins) * mixture of resins and asphaltenes * vacuum residu (noted VR) at different temperatures and from different origins

The fraction among them as so-called SARA fraction helps to calculate Colloidal Index (I c) that indicates the colloidal structure of bitumen It consequently determines rheology and mechanism of bitumen modification Different crude sources provide varied SARA fractions and therefore form diverse Colloidal structures

2014-7-2Aggregate Structure in Heavy Crude Oil: Using a Dissipative Particle Dynamics Based Mesoscale Platform Sheng-Fei Zhang † ‡ Li-Li Sun † ‡ Jun-Bo Xu † Hao Wu † and Hao Wen* † †State Key Laboratory of Multi-Phase Complex System Institute of

2020-7-30constitute the crude oil's colloidal nature [8] The following section theory summarizes some high-technology techniques regarding asphaltene structural characterization Oil production in the Persian Gulf began in the 1950s and to administer the oil and gas fields the Iranian Offshore Oil Company (IOOC) has re-organized its activities

2013-8-15oil (paraffinic oil) and vice versa To disperse two immiscible liquids one needs a third component namely the emulsifier The choice of the emulsifier is crucial in the formation of the emulsion and its long-term stability [1–3] Emulsions may be classified according to the nature of the emulsifier or the structure of the system

further crystallite parameters in different crude oil fractions such as naphthene aromatics polar aromatics and saturate fractions also can be determined by XRD 15 For example AlHumaidan et al 16 studied the in uence of thermal cracking on the molecular structure of asphaltene and their results