Title:

A Fluid Property Module for the TOUGH2 Simulator for Saline Brines with Non-Condensible Gas

Authors:

A. Battistelli, C. Calore, and K. Pruess

Conference:

Stanford Geothermal Workshop

Year:

1993

Session:

Well Test and Wellbore

Language:

English

File Size:

861KB

View File:

Abstract:

A new equation-of-state module has been developed for the TOUGH2 simulator, belonging to the MULKOM family of computer codes developed at LBL. This EOS module is able to handle three-component mixtures of water, sodium chloride, and a non-condensible gas. It can describe liquid and gas phases, and ķincludes precipitation and dissolution of solid salt. The dependence of density, viscosity, enthalpy, and vapor pressure of brine on salt concentration is taken into account, as well as the effects of salinity on gas solubility in the liquid phase and related heat of solution. The main assumptions made in developing this EOS module are discussed, together with the correlations employed to calculate the thermophysical properties of multiphase multicomponent mixtures. At present the non-condensible gas can be chosen to be air, C02, CH4, H2, or N2. This paper focuses on H20-NaCI-CO mixtures and describes new correlations oztained from fitting of published experimental data. Illustrative results for geothermal reservoir depletion in the presence of salinity and non-condensible gas are presented. We demonstrate and analyze effects of vapor pressure lowering and gas solubility decrease from salinity, and loss of reservoir porosity and permeability from salt precipitation during boiling of brines.


ec2-3-88-185-100.compute-1.amazonaws.com, you have accessed 0 records today.

Press the Back button in your browser, or search again.

Copyright 1993, Stanford Geothermal Program: Readers who download papers from this site should honor the copyright of the original authors and may not copy or distribute the work further without the permission of the original publisher.


Attend the nwxt Stanford Geothermal Workshop, click here for details.

Accessed by: ec2-3-88-185-100.compute-1.amazonaws.com (3.88.185.100)
Accessed: Thursday 28th of March 2024 10:30:46 PM