Meana Petro

Producción y levantamiento

Prueba de restauración — permeabilidad y daño

A Horner plot from your shut-in pressures, with the semilog slope turned into permeability, skin, p* and flow efficiency.

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Datos de entrada

Build-up data

Shut-in time in hours, and the pressure at that time.

FilaΔtPressure
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Increase until the line is straight and the R² stops improving.

Roca y fluido

1/psi. Typically 1×10⁻⁵ to 2×10⁻⁵.

Resultados

Cargando el cálculo…

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Cómo se calcula

  • Horner time (tp + Δt)/Δt on a log axis against shut-in pressure; the late-time points form the radial-flow straight line.
  • k = 162.6·q·B·μ/(m·h) from the slope m of that line.
  • s = 1.151·[(P₁hr − Pwf)/m − log₁₀(k/(φμct·rw²)) + 3.2275], with P₁hr read off the fitted line rather than off the data.
  • p* is the line extrapolated to a Horner time of 1; ΔPskin = 0.87·m·s.

Estándares que habla

Dónde deja de ser cierto

Horner analysis assumes an infinite-acting homogeneous reservoir, a single constant rate before shut-in, and that the line you fitted is radial flow rather than storage or a boundary. Real tests break at least one of those routinely. p* is not average reservoir pressure — it needs a Matthews–Brons–Hazebroek correction for the drainage shape, which this tool does not apply. A derivative plot decides where the radial line is; a semilog plot alone can be fitted to almost anything, which is why the fit window is yours to move.

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