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GET-03 Water?rock interaction

PNOC EDC mitigating measures to silica scaling

Adriano Jr. Cabel, PNOC Energy Development Corporation (Philippines)
Arnel Mejorada, PNOC Energy Development Corporation (Philippines)
Edwin Alcober, PNOC Energy Development Corporation (Philippines)
Erlindo Jr. Angcoy, PNOC Energy Development Corporation (Philippines)
Gabriel Aragon, PNOC Energy Development Corporation (Philippines)
James Nogara, PNOC Energy Development Corporation (Philippines)
Ramonito Solis, PNOC Energy Development Corporation (Philippines)
Orlando Maturgo, PNOC Energy Development Corporation (Philippines)
Godofredo Barroca, PNOC Energy Development Corporation (Philippines)
Fidel See, PNOC Energy Development Corporation (Philippines)
 

PNOC-EDC undertook various measures to cope with of amorphous silica scaling in the exploitation of its different geothermal fields. These include brine pH modification through acid treatment, polymerization experiments and evaluation and use of chemical inhibitors. The methods and studies were varied and suited depending on the brine chemistry of the field such that pilot test set-ups were designed to replicate actual conditions addressing silica scaling either in surface facilities or in wellbore formation that decreases acceptance of injection wells.
The pilot test set-ups can also be utilized to evaluate efficiency of different chemical inhibitors and gauge their suitability to field operations thereby saving significant costs prior to actual applications. Silica scales induced when using different kinds of inhibitors can be characterized to evaluate their acceptability to present operations. The results of the different silica inhibition studies allowed PNOC-EDC to overcome limitations to energy conversion from geothermal fluids thereby maximizing power generation.