Method for determining closure of a hydraulically induced...

Details Method for determining closure of a hydraulically induced... Method for determining closure of a hydraulically induced...

E - Fixed Constructions

21

B

E21B 43/26 (2006.01)

Patent

CA 2209306

A subsurface formation (13) surrounding a borehole (10) is hydraulically fractured when a fracturing fluid is supplied down through the borehole (10) by way of a fluid injection line (19) from the surface (11) of the earth. Pressure drop is measured along the injection line (19) as fracturing fluid flows therethrough. Both fracture closure and minimum in-situ stress are determined at the point where pressure drop is equal only to a hydrostatic pressure difference along the injection line (19).

Il est possible de fracturer hydrauliquement une formation souterraine (13) entourant un forage (10) en injectant dans le forage (10) depuis la surface (11) un liquide à effet fracturant par l'intermédiaire d'une conduite d'injection (19) de fluide. La chute de pression est mesurée le long de la conduite d'injection (19) pendant le passage du fluide d'injection. La fermeture des fractures et la contrainte minimale in-situ sont déterminées aux points où la chute de pression équivaut seulement à la différence de pression hydrostatique le long de la conduite d'injection (19).

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