Wellbore Genius

Real-well input

Type your well's true as-drilled bottom, staged footage, tubular annulus and measured Fann lab curve, then run the stage solver. Nothing here is imported from a saved record — the numbers you enter are the ones solved, and the draft is kept on this device.

My well: 18,500 ft as-drilled bottom, 40 stages over 8,300 ft (208 ft/stage), 4 tubular rows, 6 measured Fann readings (best fit Herschel–Bulkley).

Depth & footage

As-drilled bottom and the completed interval the stages are laid out over.

Well name

As-drilled bottom (ft)

Stage interval top (ft)

Stages

Staged footage8,300 ft

Footage per stage207.5 ft

Rate, density & gradients

PV/YP are the advisor-side fallback dials the lab curve is scored against.

Pump rate (gpm)

Mud weight (ppg)

Fracture gradient (ppg)

Closure gradient (ppg)

PV (fallback) (cP)

YP (fallback) (lbf/100ft²)

Rheology law

Annulus

Casing, liner and work string as run. The solver clips this tally at every stage depth.

Component	Kind	OD (in)	ID (in)	Top (ft)	Shoe (ft)

Lab curve

Raw Fann rpm / dial readings. Both laws are regressed here; the winner drives the run.

Spring factor

Shear-rate factor

Sample temperature (°F)

rpm	Dial (°)	In fit

Herschel–Bulkley

Best fit

n 0.737 · K 0.2903 · τ₀ 3.43 · R² 0.9999

Power-law

n 0.453 · K 1.8797 · τ₀ 0.00 · R² 0.9518

Stage solve

Every stage solved on the Fann lab Herschel–Bulkley fit of 6 measured readings: n = 0.737, K = 0.2903 lbf·sⁿ/100ft², τ₀ = 3.43 lbf/100ft² (R² 0.9999). Advisor column uses PV 18 cP / YP 12.2 lbf/100ft² estimated dials.

Worst ECD drift

−0.003 ppg

stage 1

Worst budget drift

+3 psi

stage 1

Tightest lab budget

1,650 psi

0 exhausted

Stages flagged

0 / 40

0 over frac

Stage	Depth (ft)	ECD lab (ppg)	ECD advisor (ppg)	Drift (ppg)	Surface budget (psi)	Closure margin (psi)	Flags
Stage 1	18,396	13.121	13.124	−0.003	2,945	1,797	clear
Stage 2	18,189	13.121	13.124	−0.003	2,912	1,777	clear
Stage 3	17,981	13.121	13.124	−0.003	2,879	1,757	clear
Stage 4	17,774	13.121	13.124	−0.003	2,846	1,737	clear
Stage 5	17,566	13.121	13.124	−0.003	2,813	1,716	clear
Stage 6	17,359	13.121	13.124	−0.003	2,779	1,696	clear
Stage 7	17,151	13.121	13.124	−0.003	2,746	1,676	clear
Stage 8	16,944	13.121	13.124	−0.003	2,713	1,656	clear
Stage 9	16,736	13.121	13.124	−0.003	2,680	1,635	clear
Stage 10	16,529	13.121	13.124	−0.003	2,646	1,615	clear
Stage 11	16,321	13.121	13.124	−0.003	2,613	1,595	clear
Stage 12	16,114	13.121	13.124	−0.003	2,580	1,575	clear
Stage 13	15,906	13.121	13.124	−0.003	2,547	1,554	clear
Stage 14	15,699	13.121	13.124	−0.003	2,514	1,534	clear
Stage 15	15,491	13.121	13.124	−0.003	2,480	1,514	clear
Stage 16	15,284	13.121	13.124	−0.003	2,447	1,493	clear
Stage 17	15,076	13.121	13.124	−0.003	2,414	1,473	clear
Stage 18	14,869	13.121	13.124	−0.003	2,381	1,453	clear
Stage 19	14,661	13.121	13.124	−0.003	2,347	1,433	clear
Stage 20	14,454	13.121	13.124	−0.003	2,314	1,412	clear
Stage 21	14,246	13.121	13.124	−0.003	2,281	1,392	clear
Stage 22	14,039	13.121	13.124	−0.003	2,248	1,372	clear
Stage 23	13,831	13.121	13.124	−0.003	2,215	1,352	clear
Stage 24	13,624	13.121	13.124	−0.003	2,181	1,331	clear
Stage 25	13,416	13.121	13.124	−0.003	2,148	1,311	clear
Stage 26	13,209	13.121	13.124	−0.003	2,115	1,291	clear
Stage 27	13,001	13.121	13.124	−0.003	2,082	1,270	clear
Stage 28	12,794	13.121	13.124	−0.003	2,049	1,250	clear
Stage 29	12,586	13.121	13.124	−0.003	2,015	1,230	clear
Stage 30	12,379	13.121	13.124	−0.003	1,982	1,210	clear
Stage 31	12,171	13.121	13.124	−0.003	1,949	1,189	clear
Stage 32	11,964	13.121	13.124	−0.003	1,916	1,169	clear
Stage 33	11,756	13.121	13.124	−0.003	1,882	1,149	clear
Stage 34	11,549	13.121	13.124	−0.003	1,849	1,129	clear
Stage 35	11,341	13.121	13.124	−0.003	1,816	1,108	clear
Stage 36	11,134	13.121	13.124	−0.003	1,783	1,088	clear
Stage 37	10,926	13.121	13.124	−0.003	1,750	1,068	clear
Stage 38	10,719	13.121	13.124	−0.003	1,716	1,047	clear
Stage 39	10,511	13.121	13.124	−0.003	1,683	1,027	clear
Stage 40	10,304	13.121	13.124	−0.003	1,650	1,007	clear