Wellbore Genius

Wellbore Pressure Sandbox

Live computeWellborePressure(...) output. See field-by-field docs at docs / wellbore-pressure-result.

Field units

Geometry

Total MD [ft]

Total TVD [ft]

ID [in]

Roughness [in]

Boundary

Solve direction

Wellhead pressure [psi]

Fluid & temperature

Fluid model

Density [ppg]

Viscosity [cP]

Surface temp [°F]

Gradient [°F/100ft]

Phase behaviour (annotation only)

The fluid models here are single-phase. Entering a bubble point does not change any computed pressure — it only marks the depth where solution gas would break out, above which this answer is an upper bound on wellhead pressure.

Flag bubble-point crossing

Flow

Include flow (friction + perfs)

Rate [bpm]

Direction

Include kinetic head (½ρv²)

Include perforation friction

N perfs

Perf dia [in]

Headline

Wellhead pressure5,000 psi

bhpPsi8,508 psi

bottomholePressurePsi8,508 psi

Alias invariant: bhpPsi === bottomholePressurePsi holds. Prefer bhpPsi in new code.

Plausibility checks

1 flagged

Velocity

16.9 ft/s

Erosional limit

12.4 ft/s

Reynolds

615,428 · turbulent

Rate

20.00 bpm

Velocity exceeds the erosional limit
Peak velocity 16.9 ft/s is at or above the API RP 14E erosional limit of 12.4 ft/s. Sustained operation at this rate risks tubing wear.

Confidence intervals & score

C · 62/100

σ density [ppg]

σ viscosity [cp]

σ temperature [°F]

σ boundary P [psi]

σ rate [fraction]

Flow sensitivity

Rate 20.00 bpm

Velocity 16.9 ft/s

Reynolds 615,428 (turbulent)

Flow share of σ² 54.6 %

Bottomhole pressure [psi]

8,508 ± 40

95 % CI [8,428, 8,587]

Wellhead pressure [psi]

5,000 ± 40

95 % CI [4,921, 5,079]

Total hydrostatic [psi]

4,750 ± 11

95 % CI [4,729, 4,772]

Probabilistic ranges vs depth

σ depth [ft]

P10–P90 rangeP50P10–P90 spread at bottom: ±52 psi (widest ±52 psi)

Score drivers

Friction dominates uncertainty (σ ≈ 30 psi from ρ/μ/rate tolerance).
Flow terms carry 54.6 % of total variance at 20.00 bpm (16.9 ft/s, Re 615428, turbulent). Changing rate moves the score only as far as that share allows — a mostly-hydrostatic well stays near the same number.
Velocity is 137 % of the API RP 14E erosional limit — score scaled by 0.85.
Boundary pressure tolerance ±25 psi is a leading driver — tighten the gauge or wellhead spec to lift the score.

Seg	TVD [ft]	T [°F] ± 1σ	Hyd [psi] ± 1σ	P@bottom [psi] ± 1σ	95 % CI
0	420	73 ± 5	190 ± 2	5,143 ± 26	[5,092, 5,194]
1	840	78 ± 5	190 ± 2	5,286 ± 27	[5,234, 5,338]
2	1,260	83 ± 5	190 ± 2	5,429 ± 27	[5,376, 5,483]
3	1,680	88 ± 5	190 ± 2	5,572 ± 28	[5,517, 5,627]
4	2,100	93 ± 5	190 ± 2	5,715 ± 29	[5,659, 5,772]
5	2,520	98 ± 5	190 ± 2	5,858 ± 29	[5,800, 5,916]
6	2,940	103 ± 5	190 ± 2	6,001 ± 30	[5,942, 6,060]
7	3,360	108 ± 5	190 ± 2	6,144 ± 31	[6,084, 6,205]
8	3,780	113 ± 5	190 ± 2	6,287 ± 31	[6,226, 6,349]
9	4,200	118 ± 5	190 ± 2	6,430 ± 32	[6,367, 6,493]
10	4,620	123 ± 5	190 ± 2	6,573 ± 33	[6,509, 6,638]
11	5,040	128 ± 5	190 ± 2	6,716 ± 33	[6,651, 6,782]
12	5,460	133 ± 5	190 ± 2	6,860 ± 34	[6,793, 6,926]
13	5,880	138 ± 5	190 ± 2	7,003 ± 35	[6,935, 7,070]
14	6,300	143 ± 5	190 ± 2	7,146 ± 35	[7,077, 7,214]
15	6,720	148 ± 5	190 ± 2	7,289 ± 36	[7,219, 7,359]
16	7,140	153 ± 5	190 ± 2	7,432 ± 36	[7,361, 7,503]
17	7,560	158 ± 5	190 ± 2	7,575 ± 37	[7,503, 7,647]
18	7,980	163 ± 5	190 ± 2	7,718 ± 37	[7,645, 7,791]
19	8,400	168 ± 5	190 ± 2	7,861 ± 38	[7,787, 7,935]
20	8,820	173 ± 5	190 ± 2	8,004 ± 38	[7,929, 8,079]
21	9,240	178 ± 5	190 ± 2	8,147 ± 39	[8,071, 8,223]
22	9,660	183 ± 5	190 ± 2	8,290 ± 39	[8,213, 8,367]
23	10,080	188 ± 5	190 ± 2	8,433 ± 40	[8,355, 8,511]
24	10,500	193 ± 5	190 ± 2	8,576 ± 40	[8,497, 8,655]

Pressure breakdown

Hydrostatic4,750.2 psi

Friction-1,174.2 psi

Kinetic0.0 psi

Perf friction-68.4 psi

Net Δp (BHP − WHP)+3,507.6 psi

Avg density8.70 ppg

PVT converged in 2 iter

Segments (25 rows)

#	Tubular	MD top [ft]	MD bot [ft]	TVD bot [ft]	T [°F]	ρ [ppg]	μ [cP]	Hydro [psi]	Fric [psi]	P @ bot [psi]
0	4.50 in string	0	600	420	72.5	8.70	1.00	190.0	-47.0	5,143
1	4.50 in string	600	1,200	840	77.6	8.70	1.00	190.0	-47.0	5,286
2	4.50 in string	1,200	1,800	1,260	82.6	8.70	1.00	190.0	-47.0	5,429
3	4.50 in string	1,800	2,400	1,680	87.6	8.70	1.00	190.0	-47.0	5,572
4	4.50 in string	2,400	3,000	2,100	92.7	8.70	1.00	190.0	-47.0	5,715
5	4.50 in string	3,000	3,600	2,520	97.7	8.70	1.00	190.0	-47.0	5,858
6	4.50 in string	3,600	4,200	2,940	102.8	8.70	1.00	190.0	-47.0	6,001
7	4.50 in string	4,200	4,800	3,360	107.8	8.70	1.00	190.0	-47.0	6,144
8	4.50 in string	4,800	5,400	3,780	112.8	8.70	1.00	190.0	-47.0	6,287
9	4.50 in string	5,400	6,000	4,200	117.9	8.70	1.00	190.0	-47.0	6,430
10	4.50 in string	6,000	6,600	4,620	122.9	8.70	1.00	190.0	-47.0	6,573
11	4.50 in string	6,600	7,200	5,040	128.0	8.70	1.00	190.0	-47.0	6,716
12	4.50 in string	7,200	7,800	5,460	133.0	8.70	1.00	190.0	-47.0	6,860
13	4.50 in string	7,800	8,400	5,880	138.0	8.70	1.00	190.0	-47.0	7,003
14	4.50 in string	8,400	9,000	6,300	143.1	8.70	1.00	190.0	-47.0	7,146
15	4.50 in string	9,000	9,600	6,720	148.1	8.70	1.00	190.0	-47.0	7,289
16	4.50 in string	9,600	10,200	7,140	153.2	8.70	1.00	190.0	-47.0	7,432
17	4.50 in string	10,200	10,800	7,560	158.2	8.70	1.00	190.0	-47.0	7,575
18	4.50 in string	10,800	11,400	7,980	163.2	8.70	1.00	190.0	-47.0	7,718
19	4.50 in string	11,400	12,000	8,400	168.3	8.70	1.00	190.0	-47.0	7,861
20	4.50 in string	12,000	12,600	8,820	173.3	8.70	1.00	190.0	-47.0	8,004
21	4.50 in string	12,600	13,200	9,240	178.4	8.70	1.00	190.0	-47.0	8,147
22	4.50 in string	13,200	13,800	9,660	183.4	8.70	1.00	190.0	-47.0	8,290
23	4.50 in string	13,800	14,400	10,080	188.4	8.70	1.00	190.0	-47.0	8,433
24	4.50 in string	14,400	15,000	10,500	193.5	8.70	1.00	190.0	-47.0	8,576