Results of flow-meter measure- ments in Soultz-sous-Forts well GPK4 - - PowerPoint PPT Presentation
Results of flow-meter measure- ments in Soultz-sous-Forts well GPK4 and implications for the fracturing mechanism in crystalline rock R. Jung, M. Pfender, P. Nami, T. Tischner ENGINE Workshop 3 Ittingen 29./30.06.2006 Relevant features of
ENGINE Workshop 3 Ittingen 29./30.06.2006
Relevant features of the wells
STIMULATION GPK4 – Part 1 – Pressure in GPK-4
STIMULATION GPK4 – Part 2 – Pressure in GPK-4
Temperature logs in GPK4 below 3500 m
Temperature [°C]
caliperlog & flow logs GPK4
Post-Frac Test GPK4; Test 05FEB22
0.01 0.1 1 10 100
time after start injection (h)
0.1 1 10 100
delta_p / derivative (bar)
derivative pressure
Data Fit
22-Feb 24-Feb 26-Feb 28-Feb 420 460 500 540 580 downhole pressure 4700m (bar) 20 40 60 80 Injection rate (l/s) q Data
Fit
a) before b) after stimulation a b
2.5 l/s
Solling Detfurth Volpriehausen
3700 m 3800 m 3900 m 4000 m 4100 m
Perforation & Frac 1 1.000 m³ Perforation & Frac 2 20.000 m³ GeneSys-Horstberg
130 140 150 160 Temperatur (°C) 4000 3900 3800 3700 3600 Teufe (m)
1E-3 0.01 0.1 1 10 0.1 1 10
Log-Log plot
Zeit Druck Steigung ½
10 20 30 Inflow (m3/h) 4300 4250 4200 4150 4100 4050
Silt- stone Sand- stone
Conglo- merates
Volcanics
60m
0.01 0.1 1 10 100 1000 time (h), since 14.01.03 0.1 1 10 100 pressure difference / derivative (bar)
factor 4 pressure derivative data fit
Parameter (h=60m): Slope of pressure/derivative
4 2
k Tf ⋅
Tf = 0.1 Dm at k = 0.35 mD Duration of bilinear flow xf > 120m