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Pre-build gate

Well approval

Submit the well's depth, rock, stress and completion parameters. Every relation the platform uses downstream — pore-pressure gradient, effective stress, poroelastic closure, treating pressure, completion geometry, slurry loading and Darcy inflow — is evaluated as written. A contradiction blocks approval instead of quietly flowing into the reservoir build.

Audit measured data instead
Approved with cautions
Nothing contradicts, but some numbers sit off normal ranges. Read the cautions before the plan inherits them.
9
Consistent
1
Cautions
0
Contradictions
1
Not submitted
Build the pad planReservoir risk screen
Well parameters
Optional entries can stay at 0 — the checks that need them are reported as not submitted rather than guessed.

Rock and depth

Read off a log, core report or offset well.

Pressure and stress

Closure from a pressure test; pore pressure at mid-pay.

Completion

The design decisions the plan will be built from.

Treatment and expected performance

Optional. Leave at 0 and the matching checks are skipped rather than guessed.

Pore-pressure gradient
Consistent
p_pore = G_pore × TVD

4,300 psi at 9,090 ft is a normal-to-overpressured gradient.

Equation gives
0.30–0.75 psi/ft (normal to moderately overpressured)
Submitted
0.473 psi/ft
Effective closure stress
Consistent
σ'_min = σ_min − p_pore > 0

Closure exceeds pore pressure by 3,200 psi, so the interval holds a fracture closed as expected.

Equation gives
> 0 psi
Submitted
3,200 psi
Closure below vertical stress
Consistent
σ_min < σ_v = 1.0 psi/ft × TVD

Minimum horizontal stress sits below the overburden, so a vertical fracture is the expected geometry.

Equation gives
< 9,090 psi
Submitted
7,500 psi (0.825 psi/ft)
Closure against the poroelastic relation
Caution
σ_min = p_pore + [ν/(1−ν)] × (σ_v − p_pore)

Entered closure is 32.7% off the relation's 5,651 psi. A gap this size means tectonic strain, so do not let the elastic constants alone set stress downstream.

Equation gives
5,651 psi from ν = 0.22
Submitted
7,500 psi
Treating pressure against the equipment limit
Consistent
p_surf = (σ_min + p_net) − 0.052 ρ TVD + friction

The limit clears the friction-free floor of 4,235 psi with 5,265 psi to spare.

Equation gives
≥ 4,235 psi at zero friction
Submitted
9,500 psi limit
Stages, spacing and lateral length agree
Consistent
L_lateral = n_stages × Δ_stage

The completion covers the lateral to within 0.3%.

Equation gives
10,000 ft entered lateral
Submitted
9,975 ft from 57 × 175 ft
Perforation cluster spacing
Consistent
Δ_cluster = Δ_stage ÷ clusters per stage

21.9 ft between clusters is a standard layout.

Equation gives
8–80 ft between clusters
Submitted
21.9 ft
Average proppant concentration
Consistent
c_avg = proppant per ft ÷ (42 × slurry bbl per ft)

0.95 lb/gal average is a normal slickwater loading.

Equation gives
0.2–4.0 lb/gal average
Submitted
0.95 lb/gal
Geothermal gradient
Consistent
T = T_surface + G_T × TVD

0.0132 °F/ft is a normal basin gradient.

Equation gives
0.008–0.025 °F/ft
Submitted
0.0132 °F/ft
Permeability against the porosity trend
Trend, not a law
Consistent
log₁₀ k ≈ 38.6 φ − 5.93 (tight-rock trend, not a law)

Permeability sits -0.07 decades from the trend for 7 % porosity — inside the spread real rock shows.

Equation gives
0.000592 mD ±2 decades
Submitted
0.0005 mD
Claimed rate against Darcy inflow
Not submitted
q = 0.00708 k h Δp / (μ B ln(r_e/r_w))

Needs an expected rate, a flowing bottomhole pressure and a fluid viscosity.

Numbers the checks derived
midPayTvdFt9,090
porePressureGradientPsiPerFt0.473
closureGradientPsiPerFt0.825
verticalStressPsi9,090
effectiveClosureStressPsi3,200
poroelasticClosurePsi5,651
completionLengthFt9,975
clusterSpacingFt21.88
avgProppantConcLbPerGal0.952
Assumptions behind the verdicts
  • Mid-pay TVD taken as top of pay + half the pay thickness = 9,090 ft.
  • Vertical stress from an overburden gradient of 1 psi/ft.
  • Hydrostatic head from 0.052 psi/ft per lb/gal.
  • Surface temperature assumed 70 °F for the geothermal gradient.