Stability and Rheological Behavior of Aqueous Foams for Underbalanced Drilling

Y. Rojas, S. Kakadjian, A. Aponte, R. Márquez, G. Sánchez

Research output: Contribution to conferenceConference presentation/ephemerapeer-review

21 Citations (Scopus)


This paper presents evaluations of stability and theological behavior of aqueous foam formulations. The stability of these systems was evaluated by the Ross-Miles method, using half-life measurements, and was studied as a function of the type and concentration of surfactants, polymers and salts. The effect of contaminants such as crude oil is also examined. A capillary tube viscometer was used to perform the rheological studies. The effect of variables such as quality of the foam, pressure system, tube diameter and polymer type is shown. Results were corrected for wall slip effect and normalized by using equalized volume corrections. Results indicated that the sensitivity of the foam to contamination with oil and salts depends on the chemistry of the foaming agent system and crude oil used. The rheological evaluations showed that the flow behavior is highly dependent on the foam quality for a given pressure, the chemistry of polymer and the tube diameter.

Original languageEnglish
Number of pages11
Publication statusPublished - 1 Dec 2001
EventSPE International Symposium on Oilfield Chemistry - Houston, TX, United States
Duration: 13 Feb 200116 Feb 2001


ConferenceSPE International Symposium on Oilfield Chemistry
Country/TerritoryUnited States
CityHouston, TX


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