Process for removing and preventing near-wellbore damage due...

Details Process for removing and preventing near-wellbore damage due... Process for removing and preventing near-wellbore damage due...

E - Fixed Constructions

21

B

E21B 37/06 (2006.01) C09K 8/524 (2006.01) E21B 43/40 (2006.01)

Patent

CA 2132041

- 23 - ABSTRACT OF THE DISCLOSURE In accordance with the present invention, there is now provided a method for removing asphaltene deposits in a well environment such as the wellbore and near- wellbore regions, comprising the injection of deasphalted oil therein to solubilize the asphaltene deposits obstructing the well environment. More specifically, the method of the invention comprises the injection of deasphalted oil into the wellbore and the near-wellbore formation followed by a soaking period and a production period. The method of the present invention has the great advantage of readily dissolving precipitated asphaltene in a well environment without other costly treatments such as the use of solvents like xylene or toluene. Furthermore, the present method does not require the incorporation of any additives in the deasphalted oil.

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