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Acid Gas Injection (AGI) Design

Gas processing · H₂S/CO₂ disposal · API 617/618 / GPSA §16

Stream & Pressures

Acid gas rate

MMscfd

Suction pressure

psia

Discharge (surface) pressure

psia

Suction temperature

°F

Composition & Gas Props

H₂S

mol%

CO₂

mol%

k (Cp/Cv)

Z factor

Adiabatic efficiency

Well / Reservoir (optional)

Well depth

ft

Fracture gradient

psi/ft

Dense-phase density

lb/ft³

Engineering Basis

Stages n = ⌈ln(Pd/Ps)/ln(r_max)⌉, equal ratio r = (Pd/Ps)^1/n.
Power = n·(ṁ/MW)·Z·R·T₁·(k/(k−1))·[r^(k−1)/k−1]/η (intercooled).
Bottomhole ≈ discharge + ρ_dense·depth/144; fracture = gradient·depth; margin = frac − BHP.
Acid gas must be dehydrated (mol sieve / TEG) to prevent hydrate & wet-acid-gas corrosion (GPSA §20).
Standards: API STD 617/618, GPSA EDB 14th Ed §16/§13/§20.