Method for monitoring a subsoil zone, particularly during stimulated fracturing operations
AssigneeCggveritas Services SA
InventorJulien Meunier
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Abstract
The invention relates to a method for monitoring a subsoil zone, wherein a plurality of receivers are arranged on a surface of the soil or near said surface, straight above a geological zone to be monitored, comprising the following steps: generating a set of reference seismic data recording seismic data by means of said receivers; correlating the seismic data recorded (52) with the reference seismic data; comparing each trace of the correlated data, with correlated traces located in a vicinity of said trace, in order to evaluate a similarity of each correlated trace with the adjacent correlated traces, detecting a microseismic event occurring in the subsoil zone by analysing said similarity. This method enables real-time monitoring.
Claims11
Method for monitoring a subsoil zone by means of a plurality of seismic receivers arranged on the surface or near said surface, comprising the following steps:
- generating a set of reference seismic data,
- recording seismic data with said receivers,
- correlating the recorded seismic data with the reference seismic data,
- comparing each correlated data trace with correlated traces located in a vicinity of said trace, in order to evaluate a similarity of each correlated trace with adjacent correlated traces, and
- detecting a microseismic event occurring in the subsoil zone by analysing said similarity.
Method for monitoring a fracturing operation in a well by means of a plurality of seismic receivers arranged about the well on the soil surface or near said surface, comprising the following steps:
- generating a set of reference seismic data following a perforation shot in the well,
- recording the seismic data of with said receivers,
- correlating the seismic data recorded with the reference seismic data,
- comparing each correlated data trace with correlated traces located in a vicinity of said trace, in order to evaluate the similarity of each correlated trace with the adjacent correlated traces, and
- detecting a microseismic event occurring in the subsoil zone by analysing said similarity.
Dependencies are inferred from the claim text.