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: SWD induced-seismicity screen — 50,000 bbl/day × 30 days, μ = 30 GPa.

← Back to manual

Results dashboard

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

Injected volume [bbl]Shear modulus G [GPa]

Mw upper bound (McGarr)

4.5

critical

V = 238,481 m³ · G = 30 GPa

Rs / Bo / co @ 5,000 ft

Rs: 667.2 scf/STB

Bo: 1.3435 bbl/STB

co: 1.51e-5 1/psi

Undersaturated

Min casing safety margin

1.17

passes

B 1.17 · C 98.82 · A 2.78

Shoe

TVD: 10,000 ft

P_hyd: 5,215 psi

T: 220 °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	2,500	1,315	2,500	-1,185	Saturated
Transition (interp)	4,779	2,500	2,500	0	P_hyd = P_b
Lower bracket	5,000	2,615	2,500	115	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	107.5	1,315	Saturated	341.8	1.1618	6.73e-6
5,000	145	2,615	Undersat.	667.2	1.3435	1.51e-5
7,500	182.5	3,915	Undersat.	606.9	1.3198	1.10e-5
10,000	220	5,215	Undersat.	552.1	1.3058	8.95e-6

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: 5,215 psi

SF: 98.82

Axial

Rating: 675,954 lbf

Load: 243,325 lbf

SF: 2.78

Passes all design factors.