Analysis of tracer and thermal transients during reinjection

Technical Report · Sun Oct 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/10154229· OSTI ID:10154229

Kocabas, I

This work studied tracer and thermal transients during reinjection in geothermal reserviors and developed a new technique which combines the results from interwell tracer tests and thermal injection-backflow tests to estimate the thermal breakthrough times. Tracer tests are essential to determine the degree of connectivity between the injection wells and the producing wells. To analyze the tracer return profiles quantitatively, we employed three mathematical models namely, the convection-dispersion (CD) model, matrix diffusion (MD) model, and the Avodnin (AD) model, which were developed to study tracer and heat transport in a single vertical fracture. We considered three types of tracer tests namely, interwell tracer tests without recirculation, interwell tracer tests with recirculation, and injection-backflow tracer tests. To estimate the model parameters, we used a nonlinear regression program to match tracer return profiles to the solutions.

• Research Organization: Stanford Univ., CA (United States). Stanford Geothermal Program
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AS07-84ID12529
• OSTI ID: 10154229
• Report Number(s): SGP-TR--127; ON: DE92016028
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
150200
152000
58 GEOSCIENCES
580000
FLOW MODELS
FLOW RATE
FLUID FLOW
FRACTURED RESERVOIRS
GEOLOGY AND HYDROLOGY OF GEOTHERMAL SYSTEMS
GEOSCIENCES
GEOTHERMAL DATA AND THEORY
GEOTHERMAL SYSTEMS
INJECTION WELLS
MATHEMATICAL MODELS
POROSITY
RESERVOIR PRESSURE
RESERVOIR ROCK
RESERVOIR TEMPERATURE