This work examines the upward natural or forced flow of geothermal fluids in liquid-dominated wells. The objective of the project is to develop a model that would adequately describe these flows and would yield predictions of use to geothermal engineers and plant designers. The unique part of this model is that it takes into account the presence and the effect of noncondensable gases, such as CO2, in the flow as well as the salts, such as NaCl. In the subsequent sections the two-phase flow equations are developed and solved with the help of a computer program. The results obtained agree well with experimental data and qualitative expectations.

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