Volúmenes de pozo y tiempo de circulación
Annular and string volumes section by section, then the strokes and the minutes to bottoms-up and to a full circulation.
Perforación
MAASP y gradiente de fractura desde LOT/FIT
Turn a leak-off or integrity test into a fracture gradient, a maximum allowable mud weight and the surface pressure the shoe will take.
Cargando el cálculo…
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Cómo se calcula
- Formation strength at the shoe = 0.052 × test mud weight × shoe TVD + surface test pressure.
- Fracture gradient = strength / shoe TVD; equivalent mud weight = gradient / 0.052.
- MAASP = (maximum allowable MW − current MW) × 0.052 × shoe TVD, with the allowable MW reduced by whatever safety margin you set.
- Kick tolerance is expressed as the equivalent mud weight at total depth that the shoe can still support.
Estándares que habla
Dónde deja de ser cierto
The test measures the weakest point exposed at the time it was run, which is usually just below the shoe but not always — an unseen weak bed deeper in the open hole will fail first and this number will not warn you. Leak-off also changes after the hole has been open for days, and ballooning formations give a leak-off that is partly elastic and partly real. Re-test rather than re-use an old number on a long open-hole section.
La capacidad que automatiza esto
- DR-02Detección Temprana de Influjo y Control de PozoA kick is formation fluid entering the wellbore. Left unchecked it becomes a blowout. This watches eleven sensor streams and warns the crew minutes earlier than pit-volume alarms do.
- DR-04Predicción de Estabilidad del PozoPredicts the mud weight window that keeps the hole open — not too light and it caves, not too heavy and it fractures.
Herramientas relacionadas
ECD y presión de fondo circulante
Annular pressure loss, flow regime and the equivalent circulating density the formation actually sees while the pumps are running.
Hidráulica de barrena y selección de boquillas
Total flow area, nozzle pressure drop, HSI and jet impact force — plus the nozzle size that would put the optimum share of pump pressure at the bit.
Survey direccional — curvatura mínima
Paste MD, inclination and azimuth and get TVD, northings, eastings, dogleg severity, vertical section and closure — with the well path drawn.