Asphaltene Inhibitor Squeezing- What Can We Learn From Scale Inhibitor Squeezing? (ABSTRACT)

摘要

Scale inhibitor squeezing is a well defined process, in which the technology has rapidly developed over the last decade, both in terms of chemical development and placement techniques. Conversely squeezing of asphaltene inhibitor chemicals still seems to rely on a more "pump it and see" approach. In this poster we present some results of laboratory testing that has been performed on asphaltene inhibitors, where we have applied some of the principals and techniques used for scale inhibitor testing to show that selection of the best performing asphaltene inhibitor will not necessarily be the optimum choice for squeezing. Whilst performance testing with respect to inhibition is important, we also look at how these inhibitors adsorb and desorb onto rock surfaces utilising simple static adsorption tests, sandpack and full core flood test procedures. The results of this testing has allowed us to modify the chemistry of conventional asphaltene inhibitors to maximise their retention time in the reservoir and so potentially improve squeeze Wetimes.