Optimization of scale inhibitor squeeze treatments in the Cedar Lake Unit

Conference · Thu Aug 01 04:00:00 EDT 1996

OSTI ID:268225

Przybylinski, J L; Ruggeri, J W ^[1]; Wakley, W D ^[2]; Winfield, M S ^[3]

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1. Petrolite Corp., St. Louis, MO (United States)
2. Amoco E and P Technology Group, Tulsa, OK (United States)
3. Amoco Production Co., Levelland, TX (United States)

Nearly 100 wells were squeezed with scale inhibitor using various combinations of preflush, scale inhibitor pH, amount of scale inhibitor, and amount of overflush. The combinations to be used were determined using a statistical design program. The low (< 1) pH scale inhibitor gave the longest squeeze life in this field. A Xylene/mutual solvent preflush increased squeeze lifetime with the low pH inhibitor. The preflush also had a beneficial effect on oil recovery time. These effects were significant at the 95% confidence level. The amounts of scale inhibitor and overflush had no verifiable effects in the ranges studied. The effects of two uncontrolled variables were also studied. The total dissolved solids (TDS) of the produced brine had near zero effect on squeeze lifetime. The daily water production of the well had a significant effect. Higher water producers had shorter squeeze lifetime. The economics of scale squeeze inhibition was investigated. The most cost-effective strategy in this field appears to be inhibiting only problem wells. However, other factors that could not be quantified in this study could favor field-wide inhibition.

• OSTI ID: 268225
• Report Number(s): CONF-960389--
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CORROSION INHIBITORS
ECONOMIC ANALYSIS
FLUID INJECTION
OIL FIELDS
OIL WELLS
PARAMETRIC ANALYSIS
RESERVOIR ENGINEERING
RESERVOIR FLUIDS
SCALE CONTROL
TEXAS
WATER CHEMISTRY