Simple Interpretations Of Chemical Transients In Multi-Feed, Two-Phase Geothermal Wells- Examples From Philippine Geothermal Fields

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Journal Article: Simple Interpretations Of Chemical Transients In Multi-Feed, Two-Phase Geothermal Wells- Examples From Philippine Geothermal Fields

Abstract
The main process responsible for the extreme variations in chloride concentrations in the water discharged by selected multi-feed, two-phase geothermal wells in the Philippines is steam addition brought about by fluid flashing in the formation or by a shallow and distinct steam zone. Correlation of enthalpy with chloride data over a span of seven years for well 106, Tongonan field, revealed the entry of reservoir fluid from the hotter portion of the field as the well responded to exploitation. Using a plot of discharge enthalpy versus total chloride, the deep chloride near well OP-3D, which is drilled at the periphery of the Bacon-Manito field, has been determined at about 8700 mg/kg. This is somewhat higher than the inferred chloride level of 7000 mg/kg in the postulated main geothermal reservoir. The competing effects of returns of reinjected water and flashing in the formation on the observed chloride concentrations in the discharge water of well PN-20D, Palinpinon field, have been segregated using the technique described above.

Authors 
J. R. Ruaya, R. P. Solis, R. R. Solana and J. S. Seastres Jr








Published Journal 
Geothermics, 1991





DOI 
Not Provided
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Citation

J. R. Ruaya,R. P. Solis,R. R. Solana,J. S. Seastres Jr. 1991. Simple Interpretations Of Chemical Transients In Multi-Feed, Two-Phase Geothermal Wells- Examples From Philippine Geothermal Fields. Geothermics. (!) .