B35 the comparison of effects of immiscible injection of natural/nitrogen gases on asphaltene precipitation process

A. Hajizadeh, R. Rostami Ravari, Mahmood Amani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Asphaltene and wax deposition in the course of production of many Iranian reservoirs has become a serious problem. In order to investigate the effect of injecting rich and dry natural gases and also nitrogen, on the asphaltene precipitation process a comprehensive research study was launched. Three phase equilibrium calculation of NGHIEM and his co-workers is used. In the method pure asphaltene in the oil is considered as solid and the heavy part of the oil is split as precipitating and nonprecipitating. The provided model is able to describe the phase behavior of reservoir oil encountered with a compositional disturbance caused by injecting light fluids into the reservoir during the production period. In this work, first, the natural depletion model of each case is constructed and then the changes of behavior by injecting rich and dry natural gases and also high nitrogen content gas is investigated. Also the change in onset of asphaltene precipitation for different injections is shown. The achieved results show that the nitrogen gas has more moderate effect on precipitation process compared to more vigorous effect of dry and rich gases.

Original languageEnglish
Title of host publication1st International Petroleum Conference and Exhibition
PublisherEuropean Association of Geoscientists and Engineers, EAGE
Publication statusPublished - 2009
Externally publishedYes
Event1st International Petroleum Conference and Exhibition - Shiraz, Iran, Islamic Republic of
Duration: 4 May 20096 May 2009

Other

Other1st International Petroleum Conference and Exhibition
CountryIran, Islamic Republic of
CityShiraz
Period4/5/096/5/09

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ASJC Scopus subject areas

  • Geochemistry and Petrology

Cite this

Hajizadeh, A., Rostami Ravari, R., & Amani, M. (2009). B35 the comparison of effects of immiscible injection of natural/nitrogen gases on asphaltene precipitation process. In 1st International Petroleum Conference and Exhibition European Association of Geoscientists and Engineers, EAGE.