TX 75083-3836, U.S.A., fax 01-972-952-9435. AbstractOccurrence of asphaltene deposition in producing formation constitutes one of the most serious problems currently encountered in the petroleum industry in many areas of the world. Reversibility of asphaltene deposition represents crucial argument and controversy in laboratory research of the petroleum industry. Deep understanding of this phenomenon is the key for treatment the problem of asphaltene deposition.

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