Solubility and phase behavior of polyacrylate scale inhibitors and their implications for precipitation squeeze treatment
Book
·
OSTI ID:113567
The phase behavior of a commercial phosphino-polyacrylate inhibitor (PPAA) in aqueous brine has been characterized as a function of temperature, pH, and the Ca{sup ++} and PPAA concentrations. The quantity of precipitate formed has been determined as a function of the same variables. Contrary to expectations, over a range of conditions the yield of phase-separated PPAA was found to be less than 50% and sometimes as low as 5%. Studies on a sample of isolated precipitate show that it has significant solubility even in brines with high Ca{sup ++} concentration. Ca{sup ++}-induced fractionation of the polymeric inhibitor by molecular weight has been identified as the mechanism responsible for both the observed precipitation and re-dissolution behavior. The implications of these results for the optimization of precipitation squeeze treatments are discussed.
- OSTI ID:
- 113567
- Report Number(s):
- CONF-950207--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Examination of the change in returning molecular weight obtained during inhibitor squeeze treatments using polyacrylate based inhibitors
Mechanistic study and modeling of precipitation scale inhibitor squeeze processes
Rock/fluid interactions and resulting phase behavior considerations for the scale inhibitor squeeze design of carbonate fields
Book
·
Tue Oct 31 23:00:00 EST 1995
·
OSTI ID:113569
Mechanistic study and modeling of precipitation scale inhibitor squeeze processes
Book
·
Tue Oct 31 23:00:00 EST 1995
·
OSTI ID:113570
Rock/fluid interactions and resulting phase behavior considerations for the scale inhibitor squeeze design of carbonate fields
Book
·
Fri Dec 30 23:00:00 EST 1994
·
OSTI ID:70050