Wellbore Genius

Unified downhole solver

One solver. One TVD grid. Hydrostatic pressure, temperature staging, black-oil PVT, and casing collapse/burst checks all share inputs and outputs.

Example scenariosLoads vetted inputs and shows the computed values vs the published expected outputs.

Loaded preset from manual: Bakken DFIT calibration — TVD 10,500 ft, BHST 240 °F, MW 9.0 ppg.

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Results dashboard

Live key outputs — updates as you change any input below.

Injected volume [bbl]Shear modulus G [GPa]

Mw upper bound (McGarr)

3.4

amber

V = 7,949 m³ · G = 20 GPa

Rs / Bo / co @ 5,250 ft

Rs: 641.8 scf/STB

Bo: 1.3396 bbl/STB

co: 1.60e-5 1/psi

Saturated

Min casing safety margin

1.17

passes

B 1.17 · C 104.56 · A 2.6

Shoe

TVD: 10,500 ft

P_hyd: 4,929 psi

T: 240 °F

Wellbore & fluid

Surface pressure [psi]Surface temp [°F]Geothermal grad [°F/100 ft]Mud weight [ppg]Bubble point [psi]API gravityGas gravity (air = 1)TVD stations [ft] (comma-separated)

Casing string at shoe

API 5CT preset

Selecting a preset overwrites OD, wall, ID, weight and yield with API 5CT datasheet values. Edit any field below to fine-tune.

OD [in]Wall [in]Yield [psi]ID override [in] (blank = OD − 2t)Nominal weight [lb/ft] (blank = geometric)Internal P at shoe [psi]

Effective ID = 6.184 in · weight = 28.72 lb/ft (used for axial load).

Casing cross-section (schematic)

Inputs used for effective ID & axial area (in)

OD7.000 in

Wall thickness t0.408 in

Geometric ID (OD − 2t)6.184 in

Effective ID (used)6.184 in

Axial area A = π/4 · (OD² − ID_eff²)8.449 in²

Effective ID selectionbranch: geometric

ID_eff = (idIn finite ∧ idIn > 0) ? idIn : (OD − 2·t)

idIn (override input)—· finite & > 0?falseOD − 2·t (geometric)6.184in→ ID_eff returned6.184in

picked from OD − 2·t = 7.000 − 2·0.408 = 6.184 in

Depth profiles

Layers:

Hydrostatic

Temperature

PVT phase

Units:

Tooltip units:

Reformats the shared tooltip + hovered/pinned export only — chart axes stay on psi / °F.

Crosshair:Show

Dash

Opacityauto

Phase transition summary

Station	TVD [ft]	P_hyd [psi]	P_b [psi]	ΔP [psi]	Phase
Upper bracket	5,250	2,472	2,500	-28	Saturated
Transition (interp)	5,310	2,500	2,500	0	P_hyd = P_b
Lower bracket	7,875	3,700	2,500	1,200	Undersaturated

Hydrostatic pressure vs TVD

Bubble point P_b shown as dashed line.

Temperature vs TVD

Linear geothermal gradient.

PVT phase vs depth

Saturated where P_hyd ≤ P_b; transition depth marked.

Depth-staged results

TVD [ft]	T [°F]	P_hyd [psi]	Phase	Rs [scf/STB]	Bo [bbl/STB]	co [1/psi]
0	70	15	Saturated	5.5	1.0034	-2.58e-6
2,625	112.5	1,243	Saturated	316	1.153	6.55e-6
5,250	155	2,472	Saturated	641.8	1.3396	1.60e-5
7,875	197.5	3,700	Undersat.	584.4	1.32	1.20e-5
10,500	240	4,929	Undersat.	524.9	1.3059	9.89e-6

Casing check at shoe (TVD = 10,500 ft)

Burst

Rating: 9,326 psi

Load: 8,000 psi

SF: 1.17

Collapse

Rating: 515,341 psi

Load: 4,929 psi

SF: 104.56

Axial

Rating: 675,954 lbf

Load: 260,103 lbf

SF: 2.6

Passes all design factors.