Analysis of internal wellbore flow

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6300053

Ripperda, M; Bodvarsson, G S

Most two-phase geothermal wells are located in fractured rocks and intersect a few major feedzones. It is well known that internal wellbore flow between feedzones often occurs during warmup or pressure recovery periods. The internal flow can occur even when the reservoir is initially in pressure equilibrium because of the different phase composition that develops within the wellbore. Internal flow can cause large apparent pressure drawdowns and significantly affect pressure and temperature surveys as well as pressure buildup tests. This paper presents an analytic method for using static pressure surveys to calculate internal flowrates between two zones when the reservoir characteristics are known. Conversely, the transmissivity of the feedzone with the lowest transmissivity can be calculated from measurements of internal flowrates and wellbore pressures. 3 refs., 6 figs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6300053
• Report Number(s): LBL-26826; CONF-880111-8; ON: DE89009973
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150902 -- Geothermal Engineering-- Fluid Transmission
150904* -- Geothermal Engineering-- Geothermal Reservoir & Well Performance
150906 -- Geothermal Engineering-- Reservoir Stimulation & Extraction Technology
DATA
ENERGY
ENERGY SOURCES
EQUATIONS
FLOW RATE
FLUID FLOW
FRACTURED RESERVOIRS
GEOTHERMAL ENERGY
GEOTHERMAL WELLS
Geothermal Legacy
INFORMATION
NUMERICAL DATA
RENEWABLE ENERGY SOURCES
RESERVOIR PRESSURE
TWO-PHASE FLOW
WELLS