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: Permian 5½-in 17 lb/ft P-110 casing check — TVD 9,500 ft, internal 9,800 psi.

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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 @ 4,750 ft

Rs: 590.2 scf/STB

Bo: 1.3039 bbl/STB

co: 1.40e-5 1/psi

Saturated

Min casing safety margin

1.24

passes

B 1.24 · C 256.34 · A 3.95

Shoe

TVD: 9,500 ft

P_hyd: 4,461 psi

T: 212.5 °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 = 4.892 in · weight = 16.87 lb/ft (used for axial load).

Casing cross-section (schematic)

Inputs used for effective ID & axial area (in)

OD5.500 in

Wall thickness t0.304 in

Geometric ID (OD − 2t)4.892 in

Effective ID (used)4.892 in

Axial area A = π/4 · (OD² − ID_eff²)4.962 in²

Effective ID selectionbranch: geometric

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

idIn (override input)—· finite & > 0?falseOD − 2·t (geometric)4.892in→ ID_eff returned4.892in

picked from OD − 2·t = 5.500 − 2·0.304 = 4.892 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	4,750	2,238	2,500	-262	Saturated
Transition (interp)	5,310	2,500	2,500	0	P_hyd = P_b
Lower bracket	7,125	3,349	2,500	849	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
2,375	105.6	1,126	Saturated	286.1	1.1354	5.48e-6
4,750	141.3	2,238	Saturated	590.2	1.3039	1.40e-5
7,125	176.9	3,349	Undersat.	615.6	1.3267	1.27e-5
9,500	212.5	4,461	Undersat.	562.7	1.3115	1.03e-5

Casing check at shoe (TVD = 9,500 ft)

Burst

Rating: 12,160 psi

Load: 9,800 psi

SF: 1.24

Collapse

Rating: 1,143,443 psi

Load: 4,461 psi

SF: 256.34

Axial

Rating: 545,865 lbf

Load: 138,212 lbf

SF: 3.95

Passes all design factors.