| Title | Erosion in South Sambaloran FCRS Facilities, Tongonan, Leyte |
|---|---|
| Authors | Erlindo C. Angcoy Jr., Edwin H. Alcober, Sylvia G. Ramos, Josephine B. Rossell and Maribel C. Zaide-Delfin |
| Year | 2005 |
| Conference | PNOC-EDC Geothermal Conference |
| Keywords | |
| Abstract | The dry discharge with elevated total suspended solids (TSS) of wells 301D and 306D in South Sambaloran sector of Tongonan Geothermal Field promoted erosion in the Fluid Collection and Reinjection System (FCRS) facilities. The problem manifested starting 2002 in the hastened erosion of wells 301D and 306D two-phase lines, branchline elbows, and of Separator Vessel 609 (SV-609) internal parts. Hot brine wellhead washing in wells 301D and 306D were commissioned in 2003 to wash the discharge fluids and minimize the sandblasting effects of the TSS in the dry medium. The mitigating measure yielded the following results after a year of operation: (1) considerable decrease (from í½520 mm maximum to í½12 mm maximum) in the amount of solids deposit in historically marked areas in the FCRS lines and equipment; (2) significant decline in the erosion rates of wells 301D and 306D two-phase lines, branchline elbows, and in SV-609 internal parts. Although the washed condition erosion rates are still higher than the acceptable erosion rate of 0.12 mm/year, a reduction of 57.45% - 86.65% from the baseline values (0.47 ¿C 1.96 mm/yr) during the unwashed period was recorded in the erosion rates in the FCRS facilities. However, steam loss (0.3 ¿C 0.35 MW) due to condensation in the washed fluids at recommended wash flows was observed. |