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 black-oil PVT — 35°API, γg 0.75, pb 2,500 psia, BHST 240 °F.

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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 @ 5,000 ft

Rs: 503.7 scf/STB

Bo: 1.2697 bbl/STB

co: 1.32e-5 1/psi

Saturated

Min casing safety margin

1.17

passes

B 1.17 · C 128.24 · A 2.67

Shoe

TVD: 10,000 ft

P_hyd: 4,019 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

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Phase transition summary

Station	TVD [ft]	P_hyd [psi]	P_b [psi]	ΔP [psi]	Phase
Upper bracket	5,000	2,017	2,500	-483	Saturated
Transition (interp)	6,207	2,500	2,500	0	P_hyd = P_b
Lower bracket	7,500	3,018	2,500	518	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
2,500	112.5	1,016	Saturated	249	1.1229	5.21e-6
5,000	155	2,017	Saturated	503.7	1.2697	1.32e-5
7,500	197.5	3,018	Undersat.	584.4	1.329	1.47e-5
10,000	240	4,019	Undersat.	524.9	1.3132	1.21e-5

Casing check at shoe (TVD = 10,000 ft)

Burst

Rating: 9,326 psi

Load: 8,000 psi

SF: 1.17

Collapse

Rating: 515,341 psi

Load: 4,019 psi

SF: 128.24

Axial

Rating: 675,954 lbf

Load: 253,427 lbf

SF: 2.67

Passes all design factors.