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 Wolfcamp surface-pressure budget — TVD 9,800 ft, MW 8.5 ppg, 4½-in casing.

← 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)

3.4

amber

V = 7,949 m³ · G = 20 GPa

Rs / Bo / co @ 4,900 ft

Rs: 569 scf/STB

Bo: 1.2947 bbl/STB

co: 1.37e-5 1/psi

Saturated

Min casing safety margin

2.06

passes

B 2.06 · C 357.42 · A 3.79

Shoe

TVD: 9,800 ft

P_hyd: 4,346 psi

T: 217 °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]

⚠ OD × wall × yield does not match any API 5CT datasheet entry. Custom string — verify before solving.

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

Casing inputs: 1 warning — review before solving.

Effective ID = 3.826 in · weight = 14.98 lb/ft (used for axial load).

Casing cross-section (schematic)

Inputs used for effective ID & axial area (in)

OD4.500 in

Wall thickness t0.337 in

Geometric ID (OD − 2t)3.826 in

Effective ID (used)3.826 in

Axial area A = π/4 · (OD² − ID_eff²)4.407 in²

Effective ID selectionbranch: geometric

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

idIn (override input)—· finite & > 0?falseOD − 2·t (geometric)3.826in→ ID_eff returned3.826in

picked from OD − 2·t = 4.500 − 2·0.337 = 3.826 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	4,900	2,181	2,500	-319	Saturated
Transition (interp)	5,623	2,500	2,500	0	P_hyd = P_b
Lower bracket	7,350	3,263	2,500	763	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
2,450	106.8	1,098	Saturated	276.8	1.1319	5.37e-6
4,900	143.5	2,181	Saturated	569	1.2947	1.37e-5
7,350	180.3	3,263	Undersat.	610.4	1.3274	1.31e-5
9,800	217	4,346	Undersat.	556.3	1.3119	1.07e-5

Casing check at shoe (TVD = 9,800 ft)

Burst

Rating: 16,476 psi

Load: 8,000 psi

SF: 2.06

Collapse

Rating: 1,553,457 psi

Load: 4,346 psi

SF: 357.42

Axial

Rating: 484,818 lbf

Load: 127,754 lbf

SF: 3.79

Passes all design factors.