| Title | Recent Experiences in Acid Stimulation Technology by PNOC-Energy Development Corporation, Philippines |
|---|---|
| Authors | Balbino C. BuÒing, Ramonchito Cedric M. Malate, Alexander M. Lacanilao, Francis Xavier M. Sta Ana and Zosimo F. Sarmiento |
| Year | 1995 |
| Conference | World Geothermal Congress |
| Keywords | acid stimulation, geothermal wells, Philippines |
| Abstract | Ten geothermal wells have been acid-stimuated by PNOC-EDC due to various natures of suspected wellbore problems ranging from inherently low permabilities to damage by either drilling mud or injected brine silica deposits. The acid treatment of the wells produced varying results from a low of 60% to a high of 911% improvement in capacity. Downhole temperature, pressure and spinner (TPS) measurements explain the apparent marginal improvement in some of the wells while actual capacity tests on earlier acidized wells confirm significant increases in individual well performance. The same measurements suggest possibilities for optimizing future acid treatments of geothermal wells with wellbore damage. |