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Introduction

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FAQ

What is WellSim ?

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Getting familiar with WellSim

Entering well geometry

Entering well data

Discharge simulations

Improving a discharge simulation

Output simulations

Tips for using WellSim

Changing how WellSim looks

Reservoir drawdown simulation

Injection simulations

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Reference

How WellSim works

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References

Glossary

Installing WellSim

For evaluation

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References

• Ambastha, A.K., and Gudmundsson, J.S. (1986) Pressure profiles in two-phase geothermal wells: comparison of field data and model calculations. Proc. 11th Workshop on Geothermal Reservoir Engineering, Stanford University, California, pp. 277-281.

• Andersen, G., Probst, A., Murray, L. and Butler, S. (1992) An accurate model for geothermal fluids as represented by H2O-CO2-NaCl mixtures. Proc. 17th Workshop on Geothermal Reservoir Engineering, Stanford University, California.

• Barelli, A., Corsi, R., Del Pizzo, G., and Scali, C. (1982) A two-phase flow model for geothermal wells in the presence of non-condensable gas. Geothermics 11, pp. 175-191.

• Bjornsson, G. (1987) A multi-feedzone geothermal wellbore simulator. M.Sc. thesis, University of California Berkeley.

• Bjornsson, G., and Bodvarsson, G.S. (1987) A multi-feedzone wellbore simulator. Geothermal Resources Council Trans. 11, pp. 503-507.

• Brill, J.P., and Arirachakaran, S.J. (1992) State of the art in multiphase flow. J. Pet. Tech., pp. 538-541.

• Bodvarsson, G.S., and Witherspoon, P.A. (1985) Flowrate decline of steam wells in fractured geothermal reservoirs. Proc. 10th Workshop on Geothermal Reservoir Engineering, Stanford University, California, p. 105.

• Clotworthy, A.W. (1994) Managing decline: optimizing generation by prediction of two-phase flow well productivities. Proc. 19th Workshop on Geothermal Reservoir Engineering, Stanford University, California.

• Ellis, A.J. and Mahon, W.A.J. (1977) Chemistry and Geothermal Systems. Academic Press, New York.

• Freeston, D.H., and Gunn, C.I.M (1993) Wellbore simulation - case studies. Proc. 18th Workshop on Geothermal Reservoir Engineering, Stanford University, California.

• Freeston, D.H., and Hadgu, T. (1986) Calculation of output characteristics of shallow wells. Proc. 8th N.Z. Geothermal Workshop. Auckland University, pp. 69-73.

• Gould, T.L., (1974) Vertical two-phase steam-water flow in geothermal wells. J. Pet. Tech. pp. 833-842.

• Goyal, K.., Miller, C.P., and Lippmann, M.J. (1980) Effect of measured wellhead parameters and well scaling on the computed downhole conditions in Cerro Prieto wells. Proc. 6th Workshop on Geothermal Reservoir Engineering, Stanford University, California, pp. 130-138.

• Grant, M.A., Donaldson, I.G., and Bixley, P.F. (1982) Geothermal Reservoir Engineering. Academic Press, New York.

• Gunn, C.I.M., and Freeston, D.H.. (1993) The revised lower bound method - analysis of flowing pressure/temperature surveys from geothermal wells. Geothermal Resources Council Trans. 17, pp. 491-498.

• Gunn, C.I.M., Freeston, D.H., and Hadgu, T. (1992) Principles for wellbore simulator validation and calibration using matching analysis - II. Case study - Well Rotokawa 5, New Zealand. Geothermics, Vol. 21, No. 3, pp. 363-376.

• Haas, J.L. (1976) Physical properties of the coexisting phases and thermochemical properties of the H2O component in boiling NaCl solutions. Geological Survey Bull. 1421-A.

• Hadgu, T., Zimmerman, R.W., and Bodvarsson, G.S. (1993) Coupling of a reservoir simulator and a wellbore simulator for geothermal applications. Geothermal Resources Council Trans., Vol. 17, pp. 499-505.

• Hadgu, T. (1989) Vertical two-phase flow studies and modeling of flow in geothermal wells. Ph.D. thesis, Auckland University.

• Hadgu, T., and Freeston, D.H. (1990) A multi-purpose wellbore simulator. Geothermal Resources Council Trans. 14, pp. 1279-1286.

• Hagedorn, A.R., and Brown, K.E. (1965) Experimental study of pressure gradients occuring during continuous two-phase flow in small-diameter vertical conduits. J. Pet. Tech. pp. 475-484.

• Kjaran, S.P., and Eliasson, J. (1983) Geothermal Reservoir Engineering Lecture Notes, Report 1983-8, UNU Geothermal Training Program, Iceland.

• Michaelides, E.E., and Shafaie, F.F. (1986) A numerical study of geothermal well flow with salts and non-condensables present. Trans. ASME, J. Energy Resources Tech. 108, pp. 140-146.

• Miller, A., and Orell, A. (1982) A model for two-phase flashing flow in geothermal wells. Proc. 7th International Heat Transfer Conference, Munich, pp. 437-442.

• Murray, L., and Gunn, C. (1993) Toward integrating geothermal reservoir and wellbore simulation: TETRAD and WELLSIM. Proc. 15th New Zealand Geothermal Workshop, Auckland University, pp. 279-284.

• Nathenson, M. (1974) Flashing flow in hot-water geothermal wells. J. Res. U.S. Geological Survey, 2, pp. 743-751.

• Pritchett, J.W., Rice, M.H. and Riney, T.D. (1981) Equation-of-State for Water-Carbon Dioxide Mixtures: Implications for Baca Reservoir. Report by Systems, Science and Software, La Jolla, California, submitted to Union Geothermal Oil Company of New Mexico and Public Service Company of New Mexico.

• Probst, A., Gunn, C., and Andersen, G. (1992) A preliminary comparison of pressure drop models used in simulating geothermal production wells. Proc. 14th New Zealand Geothermal Workshop, Auckland University, pp. 139-144.

• Pudyastuti, K., Razali, Y., Sudarman, S., and Prabowo, H. (1993) Optimization of completion size for Sibayak geothermal field.

• Ramey, H.J. (1962) Wellbore heat transmission. J. Pet. Tech., pp. 427-435.

• Razali, Y., and Gunn, C. (1992) Important considerations for optimizing geothermal wellbore diameters - Indonesian case studies. Unpublished discussion paper.

• Rumi, O. (1972) Some considerations on the flowrate/pressure curve of the steam wells at Larderello. Geothermics, Vol. 1, No. 1, pp. 13-23.

• Ryley, D.J. (1980) Analysis of the flow in the reservoir-well system, in Kestin ed., Sourcebook on the Production of Electricity from Geothermal Energy, U.S. Department of Energy, Washington DC.

• Tachimori, M. (1982) A numerical simulation model for vertical flow in geothermal wells. Proc. 8th Workshop on Geothermal Reservoir Engineering, Stanford University, California, pp. 155-160.

• Upadhyay, R.N., Hartz, J.D., Tomkoria, B.N., and Gulati, M.S. (1977) Comparison of calculated and observed pressure drops in geothermal wells producing steam-water mixtures. Soc. of Pet. Eng. of ASME, pp. 1-10.

• Wallis, G.B. (1969) One-dimensional two-phase flow. McGraw-Hill, New York.

• Wallis, G.B. (1982) Review - theoretical models of gas-liquid flows, J. of Fluids Eng., 104, pp. 279-283.