Meana Petro

Producción y levantamiento

Análisis de curvas de declinación

Paste a rate history and get an Arps fit — qi, Di and b — with the time to the economic limit, remaining reserves and an EUR.

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Datos de entrada

Historial de caudal

Months from the start of the decline, and the rate. Paste two columns from a spreadsheet.

FilaMonthRate
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

Same units as the rate column.

Added to remaining reserves to give EUR. Leave at zero to see reserves only.

Resultados

Cargando el cálculo…

Este cálculo se ejecutó en tu navegador. Ningún valor que introdujiste se envió a ningún sitio, y nada se guardó.

Cómo se calcula

  • Exponential fits ln q against t; harmonic fits 1/q against t; both are one regression.
  • Hyperbolic scans b from 0.05 to 1.5 and linearises q^(−b) against t at each candidate, keeping the b with the lowest residual sum of squares.
  • On "best fit" the three models compete on residual, so the answer is whichever describes the data rather than whichever was assumed.
  • Reserves integrate the chosen Arps form analytically down to the economic rate; EUR adds the cumulative you enter.

Estándares que habla

Dónde deja de ser cierto

Arps is an empirical curve, not physics. It assumes boundary-dominated flow at constant bottom-hole pressure with no operating change — so a fit over a period containing a workover, a compressor start-up or a choke change describes the intervention, not the reservoir. In unconventional wells the early transient period fits with b well above 1, which is mathematically unbounded and gives reserves that cannot exist; those wells need a terminal exponential decline imposed, and this tool does not impose one for you.

La capacidad que automatiza esto

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