An investigation on asphaltene precipitation potential for light and heavy oils, during natural depletion

Alireza Hajizadeh, Reza Rostami Ravari, Mahmood Amani, Shedid A. Shedid

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

Abstract

Asphaltene and wax deposition during production of many Iranian reservoirs has become a serious problem. In order to investigate the asphaltene precipitation behavior of various Iranian light and heavy oils and to predict their best method of prevention and/or curing the problem a comprehensive research study was launched. This article describes the precipitation potential of various reservoir oils, (8 samples, light and heavy) during their deposition. Three-phase equilibrium calculation of NGHIEM et al., is used. In the method pure asphaltene in the oil is considered as solid. The heavy part of the oil is split as precipitating and nonprecipitating. The results of the study, which compares the onset and quantity of asphaltene precipitation of the oil samples revealed; a) the precipitation potential in the light oils depends strongly on the nature of asphaltene molecules in the oil which varies from one to another, b) Light oils behave in a more complicated fashion than heavy oils, c) The volatile oils were more unstable and the ratio of precipitation to the heavy fraction of the oil is highest. The paper describes the foregoing in detail.

Original languageEnglish
Title of host publicationSociety of Petroleum Engineers - Nigeria Annual International Conference and Exhibition 2008, NAICE 2008
PublisherSociety of Petroleum Engineers
ISBN (Print)9781613990742
Publication statusPublished - 1 Jan 2008
EventNigeria Annual International Conference and Exhibition 2008, NAICE 2008 - Abuja, Nigeria
Duration: 4 Aug 20086 Aug 2008

Other

OtherNigeria Annual International Conference and Exhibition 2008, NAICE 2008
CountryNigeria
CityAbuja
Period4/8/086/8/08

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ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology

Cite this

Hajizadeh, A., Ravari, R. R., Amani, M., & Shedid, S. A. (2008). An investigation on asphaltene precipitation potential for light and heavy oils, during natural depletion. In Society of Petroleum Engineers - Nigeria Annual International Conference and Exhibition 2008, NAICE 2008 Society of Petroleum Engineers.