Three Dimensional Numerical Modeling of Mindanao Geothermal Production Field, Philippines


E.B. Emoricha, J.B. Omagbon and R.C.M. Malate

Key Words:

Mindanao, Philippines, numerical modeling

Geo Location:

Mt. Apo, Philippines; Mindanao


Stanford Geothermal Workshop







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The three-dimensional numerical model of Mindanao Geothermal Production Field developed to predict reservoir conditions under different exploitation schemes. The numerical model, consisting of 16,411 active blocks was calibrated using TOUGH2 against pre-exploitation state of the reservoir and 13 years production history of the field. Natural state modeling gave good matches to the measured temperatures and pressures, and showed good agreement with the major flow features of the conceptual model. Production history matching was also able to match the field discharge trend. The numerical model also reproduced observed physical properties, such as minor effects of injected fluids and expansion of two-phase region. With the current extraction strategy of the field and planned development of additional 50MWe generation, forecasting runs were also conducted to investigate the viability of the project.

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