Technical- Part 9

Question 1

Define 3 essential parts of Data Frac

Answer 1

Pnet, ISIP, BHP

Question 2

• Closure Test

Answer 2

• Step-rate test: gives upper bound of Pc (use pump-in to get lower bound). Plot rate v press in BHP graph
• Flowback test (1/4 of last rate in step test)-inflection points in rate change give Pc at intersection

Question 3

Calibration decline test

Answer 3

• Calibration decline test-use to confirm Pc and Pnet (Pnet=ISIP-Pc), leakoff coefficient, height, Xf,width
  
  • Use G function here

Question 4

Calibration Injection

Answer 4

• Calibration Injection (fluid/rate the same as in pad)-gives fracture geometry (PKN,KGD,Radial)

Question 5

Closure P

Answer 5

• Closure P is avg value of stress acting perpendicular to fracture face where fracture is a 0 height
  
  • Net Pressure = BHP – P_c = ISIP – P_c = ISIP_Post - ISIP_Pre
  • P_BH = P_WB + P_Hyd - P_Fric

Question 6

Data Frac Analysis graph

Answer 6

Question 7

HiWay

Answer 7

• Infinite conductivity channels created between pulsated prop densities (from differential pressure b/t slugs)

Question 8

• Frac Software

Answer 8

• FracCAT-
• FracCADE-modeling software
• FTL-
• PumpSIM-used for Nodal Analysis
• Wellbook-
• MFO-
• OPAL-
• Planar 3d-
• Kinetics-single platform that provides integration from seismic to stimulation design and modeling