Permanent seismic source
AssigneeIfp
InventorPatrick Meynier
Life of this patent
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Abstract
The present invention relates to a system for emitting seismic waves in an underground formation traversed by a well comprising a casing (10). The system comprises a casing seal (1) allowing passage of a magnetic field, an active part generating seismic waves, made up of magnetic-field active elements (4) and arranged outside the casing seal, and a mobile magnetic field induction source (8) arranged inside the casing seal. The invention also relates to a method implementing the seismic wave emission system.
Claims29
1-11. (canceled)
A system for emitting seismic waves in an underground formation traversed by a well comprising:
- a casing, a casing seal for allowing passage of a magnetic field, an active part for generating seismic waves, including elements disposed outside the casing seal, which are activated by a magnetic field which cause deformation thereof which provides generation of the seismic waves and a mobile magnetic field induction source disposed inside casing seal.
A method in a system including a casing, a casing seal for allowing passage of a magnetic field, an active part for generating seismic waves, including elements disposed outside the casing seal, which are activated by a magnetic field which cause deformation thereof which provides generation of the seismic waves and a mobile magnetic field induction source disposed inside casing seal, comprising:
- activating the active elements disposed outside the casing of a well with a magnetic field emitted by the mobile magnetic field induction source disposed within the casing of the well and which passes through the casing of the well.
Dependencies are inferred from the claim text.