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Locating the relative trajectory of a relief well drilled to kill a blowout well

  • US 4,480,701 A
  • Filed: 09/08/1982
  • Issued: 11/06/1984
  • Est. Priority Date: 09/08/1982
  • Status: Expired due to Fees
First Claim
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1. A method of locating a relative trajectory of a relief well with respect to a blowout well intersecting subsurface formations at known depths comprising the steps of:

  • determining at what depths said blowout well intersects said subsurface formations;

    logging said relief well for some measurable parameter which indicates said subsurface formations to produce a measured parameter log indicating where said relief well intersects said subsurface formations;

    selecting from said log correlation points at which said relief well and said blowout well intersect the same subsurface formations; and

    locating the relative trajectory of said relief well with respect to said blowout well from bore hole length differences between formation intersection depths in said relief well and blowout well taken between the same correlation points.

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