Asphaltene-Induced Precipitation and Deposition During Pressure Depletion on a Porous Medium: An Experimental Investigation and Modeling Approach

Autor:	Simón López-Ramírez, José Luis Mendoza De La Cruz, Víctor Matías-Pérez, C. Duran-Valencia, Francisco J. Argüelles-Vivas
Rok vydání:	2009
Předmět:	Chemistry General Chemical Engineering Energy Engineering and Power Technology Core sample Mineralogy Effective porosity Permeability (earth sciences) Fuel Technology Chemical engineering Bubble point Relative permeability Porous medium Porosity Asphaltene
Zdroj:	Energy & Fuels. 23:5611-5625
ISSN:	1520-5029 0887-0624
DOI:	10.1021/ef9006142
Popis:	Dynamic displacement experiments, simulating temperature and pressure conditions of an oil-bearing formation during primary production stage, were carried out to investigate the processes of asphaltene-induced precipitation and deposition during pressure depletion on a core sample and their effects on the absolute permeability. A representative monophasic-bottom-hole fluid sample and one core of consolidated Bedford limestone were used in coreflood tests. To identify the pressure and temperature conditions at which the asphaltene will begin to precipitate, as well as the bubble-point pressures of the reservoir fluid sample, the light-scattering technique solid detection system (SDS) using a variable volume, visual PVT cell was used. The coreflood test results indicated that the in situ asphaltene precipitation and deposition on porous medium damage absolute permeability and reduce effective porosity as reservoir fluid pressure is reduced until a point near bubble-point pressure. Core impairment, resulting...
Databáze:	OpenAIRE
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