Rock/fluid interactions and resulting phase behavior considerations for the scale inhibitor squeeze design of carbonate fields
Book
·
OSTI ID:70050
- AEA Technology, Winfrith (United Kingdom). Petroleum Services
The injection of acidic phosphonate and phosphinopolycarboxylate scale inhibitors into limestone formations has been carefully examined by a combination of rock/inhibitor dissolution experiments and aqueous phase behavior mapping exercises in calcium enriched seawater. Physico-chemical characteristics associated with bulk tests and dynamic core flooding studies were able to establish the complex interplay between acid dissolution of rock, calcium enhancements in the aqueous phase, pH shifts, progression to precipitation phase envelopes, deposition of precipitated inhibitor and core stimulation. Such rock/fluid interaction data enabled appropriate phase behavior maps to be generated with variable calcium loadings to quantitatively describe the development of precipitation boundaries as a function of temperature, pH, inhibitor concentration and calcium level. The combination of phase behavior data with rock dissolution studies has enabled an in-situ description of the fluid flow and depositional environment during flooding.
- OSTI ID:
- 70050
- Report Number(s):
- CONF-940222--
- Country of Publication:
- United States
- Language:
- English
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