Wellbore Genius

DFIT WorkbenchMethod

ISIP back-extrapolation, G-function closure, √t after-closure linear flow, and step-rate analysis on the synthesized injection trace. Edit the inputs to drive every plot in real-time.

Injection schedule

Drives the synthesized pressure trace.

Treating BHP [psi]

Friction [psi/bpm]

Target closure Pc [psi]

Falloff window [min]

Stages

Label

Rate [bpm]

Duration [min]

Diagnostic picks

Auto-derived from the current trace.

ISIP [psi]

7120

90% CI [7120, 7120] · σ 0.0

R² 1.000

Shut-in time [min]

4.00

P @ shutin 7120 psi

Closure Pc [psi]

6935

90% CI [6935, 6935] · σ 0.0

G* 1.01

Pump time tp [min]

4.00

tangent 0.0 psi/G

CIs at 90% — ISIP from analytic OLS SE; Pc from 200-sample residual bootstrap.

Measured DFIT trace

Upload a recorded pressure/rate CSV to drive every plot below with real shut-in data. Auto-detects columns named like t [min], pressure [psi], rate [bpm]. Units in brackets ([s], [kPa], [MPa], [bar], [m3/min], [gpm]) convert on the fly.

Driving plots: synthesized

Choose CSV file

…or paste CSV rows

Sampling cadence diagnostics

Verifies the measured trace is monotonic, has no duplicate timestamps, and samples evenly enough for stable G-function derivatives. Runs on the raw CSV trace before preprocessing.

Idle (synthesized trace)

Load a measured DFIT CSV to run cadence checks.

Preprocessing

Condition the measured trace before ISIP, G-function, and √t picks. Smoothing reduces dP/dG noise; outlier rejection (Hampel filter) clips sensor spikes; baseline correction subtracts a constant or linear pre-shutin drift.

Idle (synthesized trace)

Smoothing

Half-window k [samples] (window = 2k+1)

Outlier removal

MAD multiplier nσ [—] (3 = classic Hampel)

Half-window [samples]

Baseline correction

Leading window if no quiescent prefix [min]

Closure picking (G·dP/dG)

Tune the algorithm and tangent window used to extract G* and Pc from the G-function diagnostic.

algo: tangent-departure

Algorithm

Tangent window G min [-]

Tangent window G max [-]

Departure threshold [%]

Min closure G [-]

Tangent slope (median of G·dP/dG ÷ G inside [0.30, 1.00]) = 0.0 psi/G. Departure threshold and min-closure G only apply where the algorithm uses them.

Plots

Pressure trace, G-function diagnostic, and √Δt after-closure plot.

Stage-by-stage DFIT

Auto-detects every pump-then-shutin segment in the active trace and runs the same ISIP / G-function / closure pipeline on each. Click a stage to drill in; compare ISIP, Pc and net pressure across stages.

1 stage detected

Stage	Avg rate [bpm]	Pump [min]	Falloff [min]	ISIP [psi]	Pc [psi]	G*	Net P [psi]
Inj-1 schedule	5.00	3.00	30.00	7120	6966	1.01	154

Selected: Inj-1

Slice 16…680 (665 samples) · shut-in @ 4.00 min

Step-Rate Test

Edit stabilized rate / pressure pairs. Two-line regression finds the formation parting rate and pressure.

Parting rate [bpm]

4.85

90% CI [5, 5] · σ 0.0

Parting pressure [psi]

7048

90% CI [7040, 7053] · σ 3.9

Matrix slope [psi/bpm]

220.0

Fracture slope [psi/bpm]

45.5

Steps

Rate [bpm]	Stabilized P [psi]

Parting at 4.85 bpm / 7048 psi