Wellbore models GWELL, GWNACL, and HOLA: User's guide

Technical Report · Tue Oct 01 00:00:00 EDT 1991

DOI:https://doi.org/10.2172/5785189· OSTI ID:5785189

Aunzo, Z P ^[1]; Bjornsson, G ^[2]; Bodvarsson, G S ^[3]

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1. PNOC Energy Development Corp., Metro Manila (Philippines). Geothermal Div.
2. Icelandic National Energy Authority, Reykjavik (Iceland)
3. Lawrence Berkeley Lab., CA (United States)

This report describes three multi-component, multi-feedzone geothermal wellbore simulators developed. These simulators reproduce the measured flowing temperature and pressure profiles in flowing wells and determine the relative contribution, fluid properties (e.g., enthalpy, temperature) and fluid composition (e.g. CO{sub 2}, NaCl) of each feedzone for a given discharge condition. The three related wellbore simulators that will be discussed here are HOLA, GWELL and GWNACL. HOLA is a multi-feedzone geothermal wellbore simulator for pure water, modified after the wellbore simulator developed by Bjornsson, 1987 and can now handle deviated wells. The other two simulators GWELL and GWNACL are modified versions of HOLO that can handle H{sub 2}O CO{sub 2} and H{sub 2}O-NaCl systems, respectively. These simulators can handle both single and two-phase flows in vertical and inclined pipes and calculate the flowing temperature and pressure profiles in the well. The simulators solve numerically the differential equations that describe the steady-state energy, mass and momentum flow in a pipe. The codes allow for multiple feedzones, variable grid spacing and well radius. Theses codes were developed using FORTRAN language on the UNIX system.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5785189
• Report Number(s): LBL-31428; ON: DE92009494
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
BOREHOLES
COMPUTERIZED SIMULATION
GEOTHERMAL WELLS
BLOOD FLOW
FLOW MODELS
FORTRAN
G CODES
H CODES
MANUALS
MATHEMATICAL MODELS
PIPES
STEADY-STATE CONDITIONS
WELLHEADS
CAVITIES
COMPUTER CODES
DOCUMENT TYPES
PROGRAMMING LANGUAGES
SIMULATION
WELLS
Geothermal Legacy
150303* - Geothermal Exploration & Exploration Technology- Exploratory Drilling & Well Logging
990200 - Mathematics & Computers