| Title | Migration of High CI-B Molar Ratio, Gas Depleted and Cooler Masakrot Fluids Toward the Central Palayang Bayan Sector of the Bacman Geothermal Production Field, Philippines |
|---|---|
| Authors | R. P. Solis, M. N. Ramos-candelana, 0.0. Maturgo, J. J. Fmgata, and S.G. Ramos |
| Year | 1998 |
| Conference | PNOC-EDC Geothermal Conference |
| Keywords | |
| Abstract | The migration of the high Cl-B molar ratio (70-80), gas-depleted (0.12 % NCG in total discharge) and cooier (24O-25O0C) Masakrot fluids toward the central Palayang Bayan sector of the Bacman geothermal production field is a result of pressure drawdown due to continuous exploitation. n e recharge porn Masakrot has minimised the decline of reservoir pressure (0.70 Mpad in the southern sector wells (Sector IVJ and has resulted in minimal reduction in power output af 2.7MWe af2er 3 yews of exploitation. However, the entry of Masakrot fluid has no impact yet on the NCG level of the field because aflected wells are already low in gas. Unaffected wells remain gasv and are producingfiom the gas-rich two-phase upper feed zones. The Masabotfluid is conveyed to Pal-3D and Pal-ID mainly through the Bayan South fault. The next wells that may be affected by Masakrot fluids through the Makabug and Madanan fmlts could be the well$ in the northern (sector I) and central sectors (Sector III, where the Cl-B molar ratios are alrelldy increasing close to the Masakrot fluid signature. Significant decline in gas levels may follow and alleviate the high NCG problem in Bacman I. The 12 W e decline in power output porn October 1995 to December 1996 is not related to Masakrot fluid incursion, but can be attributed to: I) large pressure drawdown in Pal-8D (6.3 M e ) .and Pa!- 200 (3.2 $We) and 2) cooler water inflows due to casing damage in Pal-I 40 (2. I m e ) . |