Relative and absolute error models for subterranean wells

Details Relative and absolute error models for subterranean wells Relative and absolute error models for subterranean wells

G - Physics

01

V

G01V 3/18 (2006.01) G01V 3/26 (2006.01) G01V 3/34 (2006.01) E21B 47/00 (2006.01)

Patent

CA 2754152

A relative error model is used to compute a relative uncertainty in the position of a first well with respect to a second well. This relative uncertainty may be computed in real time during drilling and may be used in making subsequent steering decisions during drilling. Moreover, an absolute uncertainty in the position of a first well may be obtained by combining an absolute uncertainty in the position of a second well and the relative uncertainty in the position of the first well with respect to the second well.

Selon l'invention, un modèle d'erreur relative est utilisé pour calculer une incertitude relative dans la position d'un premier puits par rapport à un second puits. Cette incertitude relative peut être calculée en temps réel durant le forage et peut être utilisée pour prendre d'autres décisions de conduite à tenir durant le forage. De plus, une incertitude absolue dans la position d'un premier puits peut être obtenue en combinant une incertitude absolue dans la position d'un second puits et l'incertitude relative dans la position du premier puits par rapport au second puits.

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