Wellbore Genius

Downhole Simulator

Performance modeling

v1.0Solver: OK

Proppant trapping

First-order immobilization ODE with per-type multipliers. Default values are the PDF's typical numbers — set m_tot,max to 0 to disable trapping.

Trapping ODE

dm_i,imm/dt = K_imm · (m_i − m_i,imm) · subject to per-type cap (multiplier × m_tot,max) and global cap Σ m_i,imm ≤ m_tot,max. Process is irreversible (washout is modelled separately).

Global parameters

K_imm (min⁻¹)PDF typical: 0.1m_tot,max (lb/ft²)PDF typical: 0.15; 0 disables trappingStage A duration (min)Stage B duration (min)

per-type configuration

Cap multipliers are clamped to ≤ 1.0 (PDF spec). The pumping order column lets you reproduce path-dependence — pump Prop1 in stage A, Prop2 in stage B, and watch which one fills the global cap first.

On	Type	Cap mult.	Per-type cap (lb/ft²)	Mobile A (lb/ft²)	Mobile B (lb/ft²)
	Natural sand		0.150
	Resin-coated sand (RCS)		0.135
	Ceramic / bauxite		0.120
	Ultra-lightweight (ULW)		0.075

Immobilized mass trajectory

Σ immobilized (final)

0.1500 lb/ft²

Global cap utilisation

100.0%

Limiting cap (final step)

global

Steps integrated

100

Type	m_imm (lb/ft²)	Per-type cap (lb/ft²)	% of own cap	Cap-limited?
Natural sand	0.1500	0.1500	100.0%	No
Ceramic / bauxite	0.0000	0.1200	0.0%	Yes

Exports

Download the current trajectory + final state as CSV (per-step rows + per-type summary) or as a PDF report archived alongside other module outputs.