Calcite Deposition of Wells Affected by Re-injected Fluids in Palinpinon II Southern Negros Geothermal Production Field, Philippines
- Key words
- calcite deposition, calcite saturation index, reservoir tracer
- Location
- Palinpinon, Philippines; Negros
- Conference
- World Geothermal Congress
- Year
- 2010
- Session
- 27. Corrosion and Scaling
- Language
- English
- Paper number
- 2718
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Abstract
This work investigated the calcite-inhibiting property of re-injected (RI)-fluids. Calcite solubility and calcite saturation indices (CSI) data for wells NJ3D, NJ5D, NJ7D from Y2000 to Y2006 were established. With the use of tracer data and computed void-volume-ratios at each well’s permeable zones, the calcite-inhibition property of RI-fluids was examined.
From this study, the calcite-inhibition property of RI-fluids needs to be re-assessed. It was likely that the available void-volume for deposition in reservoir-rock was the primary factor that dictates how obstructive calcite deposition would be in steam production. The deposition triggered by mixing of in-situ well fluid with RI fluid would be less obstructive in wells with bigger void-volumes than those with smaller void-volumes.
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