Potential of Ultrasonic Generators for Use in Oil Wells and Heavy Crude Oil/Bitumen Transportation Facilities

Islam, M.R.

doi:10.1007/978-1-4757-9293-5_7

Cited by 7 publications

(4 citation statements)

References 19 publications

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“…Asphaltene is an undesirable and destructive product of petroleum production because of many problems related to its deposition. The tendency of Asphaltene to aggregate and precipitate onto surfaces depends on changing at reservoir conditions such as the oil composition, reservoir pressure and ambient temperature [2][3][4] and its deposition can cause obstructions in flow within the production systems, reducing of the hydrocarbon effective mobility ( ⁄ ) by a) pore throat blockage b) And absorbing on to the rock and altering wet ability of formation c) increasing the reservoir fluid viscosity and also can have effect on the petro physical properties of porosity and permeability [5][6][7][8] during several processes mainly drilling ,coring , well completion , production , work over and injection of water or chemical for enhanced recovery [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Influences of Asphaltene Deposition on Formation Damage and Gas Coning

Riazi¹

2018

BJSTR

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Asphaltene deposition in porous media would lead to reduction of effective pore/throat radius when the pressure of reservoir fluid drops below the onset of Asphaltene flocculation pressure. Therefore, causing major problems such as formation damage, more pressure drop around the well-bore, increased tendency to water and gas coning and subsequently disruption the oil production rate and the economical oil recovery. The main objective of this study is to estimate the gas coning height in the vicinity of the production well-bore due to Asphaltene induced formation damage and investigate the effect of various flow rates on gas coning height using information of two reservoirs. The results prove Asphaltene damages the reservoir by reducing rock permeability and porosity and progressive increase of the skin factor and which can result in productivity impairment. So, it is important to clearly investigate formation damages because removing them is so expensive and sometimes impossible.

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Section: Introductionmentioning

confidence: 99%

Influences of Asphaltene Deposition on Formation Damage and Gas Coning

Riazi¹

2018

BJSTR

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“…For example, ultrasonic processing has demonstrated great potential in pipeline descaling and cleaning, improved transportation, and refining and production processes such as upgrading (i.e., the rate and efficiency of molecular weight reduction) under ambient conditions. [7][8][9][10][11][12][13][14][15] However, detailed information is currently unavailable on the impacts of primary ultrasonic process variables such as discrete frequencies and sparge gases on the molecular weight reduction of asphaltene samples. Moreover, this is the first investigation that evaluates sonochemical upgrading of asphaltene in terms of number average molecular weight, a direct and quantitative measure.…”

Section: Introductionmentioning

confidence: 99%

“…Over the past two decades, ultrasonic treatment has been investigated as a potential alternative to traditional cracking processes. For example, ultrasonic processing has demonstrated great potential in pipeline descaling and cleaning, improved transportation, and refining and production processes such as upgrading (i.e., the rate and efficiency of molecular weight reduction) under ambient conditions. − …”

Section: Introductionmentioning

confidence: 99%

Impacts of Sonochemical Process Variables on Number Average Molecular Weight Reduction of Asphaltene

Kang

Hua

Xiao

2006

Ind. Eng. Chem. Res.

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Athabasca asphaltene was ultrasonically processed under a variety of conditions. Five discrete ultrasonic frequencies and four saturating gases were explored. The kinetics of the reduction in the number average molecular weight (NAMW) were determined by vapor pressure osmometry measurements and UV/visible spectrophotometric measurements. The NAMWs decreased significantly after short treatment times (from ∼1200 to ∼470 g/mol in 15 min). The observed reduction in the NAMWs of asphaltene was greatest at 358 kHz. At a frequency of 205 kHz, the observed reduction in NAMW was fastest with a mixture of Ar/H 2 (50%/50% v/v), whereas saturating with hydrogen, air, and oxygen gases exhibited minimal effect on the kinetics. Visible light absorption spectra of asphaltene samples demonstrate that heptane soluble fractions increase by >50% after sonochemical treatment as an upgrading process.

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“…Miscible and immiscible flooding operations exhibit suitable environments for such precipitation. In some cases, asphaltene precipitation can occur during natural depletion and oil transportation and, commonly, during well stimulation (Islam, 1995). Changes in temperature, pressure, and composition during oil production can destabilize the colloidal dispersion of asphaltenes in oil (Hirschberg, 1984).…”

Section: Introductionmentioning

confidence: 99%

A Comprehensive Expert System for Diagnosing and Assessing Formation Damage

2006

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TX 75083-3836 U.S.A., fax 01-972-952-9435. AbstractAn expert system capable of diagnosing the potential of formation damage caused by clay swelling, fines migration, inorganic scale deposition, and organic scale precipitation was developed and implemented. In this manuscript, we present results for the expert modules pertaining to asphaltene precipitation and asphaltic sludging. These modules estimate heuristically the potential for asphaltene precipitation, and for asphaltene sludge due to acidizing.Rules of thumb pertaining to asphaltene precipitation caused by solubility incompatibility between crude and solvent were collected. Membership functions to fuzzify these rules were constructed. The asphaltene module is capable of estimating the potential of asphaltene precipitation for a wide range of phase-behavior reservoir conditions, and for a much wider range of live and stock-tank crude compositions than what can normally be handled by a human expert. The acid sludge module makes its judgment based on factors such as acid strength, acid type, solvent preflush, iron control additives, Ferrous and Ferric ion concentrations, mutual solvent concentration, corrosion inhibitor type, and surfactant types used. A model has been formulated to predict the amount of asphaltene sludge that is likely to form as a consequence of crude-acid contact.A graphical user interface using various templates for data input and modules output has been built to make the expert system user friendly. The expert modules have been validated using a range of field data. This expert system gives the advantage of automating the diagnosis process pertaining to formation damage.

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Potential of Ultrasonic Generators for Use in Oil Wells and Heavy Crude Oil/Bitumen Transportation Facilities

Cited by 7 publications

References 19 publications

Influences of Asphaltene Deposition on Formation Damage and Gas Coning

Influences of Asphaltene Deposition on Formation Damage and Gas Coning

Impacts of Sonochemical Process Variables on Number Average Molecular Weight Reduction of Asphaltene

A Comprehensive Expert System for Diagnosing and Assessing Formation Damage

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