Scale inhibition in geothermal operations: experiments with Dequest 2060 phosphonate in Republic's East Mesa Field
Two calcium carbonate (CaCO/sub 3/) scale inhibition tests have been performed at East Mesa wells number 16-29 and number 56-30. The first test at well number 16-29 could not be finished due to downhole pump problems. However, two inhibitor concentration runs were completed and a third run started before the pump failed. A follow-up test at well number 56-30 was completed according to the original plan. Typical power plant conditions (i.e., pressure and temperature drops, flow conditions) were simulated by using test loops (pipe diameters of eight inches at well number 16-29 and twelve inches at well number 56-30) and field separators. Untreated East Mesa brine exhibits a calcium carbonate scale tendency as soon as the pressure is dropped below 75 psig. The uninhibited brine from well number 16-29 formed a maximum scale thickness of 0.5 inch in an eight inch ID pipe after a 92.75 hour test run at an average production rate of 375,000 lb/hr. The brine from well number 56-30 formed a maximum scale thickness of 1.25 inches in a twelve inch ID pipe after a 104 hour test run at an average production rate of 722,000 lb/hr. The principal conclusions of this test work are listed.
- Research Organization:
- Vetter Research, Costa Mesa, CA (USA); Republic Geothermal, Inc., Santa Fe Springs, CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6020239
- Report Number(s):
- LBL-9089
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CORROSION INHIBITORS
TESTING
EAST MESA GEOTHERMAL FIELD
GEOTHERMAL FLUIDS
SCALING
CALCIUM CARBONATES
GEOTHERMAL POWER PLANTS
GEOTHERMAL WELLS
INJECTION WELLS
PIPES
SIMULATION
TEST FACILITIES
THICKNESS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
DIMENSIONS
FLUIDS
GEOTHERMAL FIELDS
OXYGEN COMPOUNDS
POWER PLANTS
THERMAL POWER PLANTS
WELLS
Geothermal Legacy
150903* - Geothermal Engineering- Corrosion
Scaling & Materials Development