| 摘要 |
An invention for the filtering, sorting and analysis of microseis- micity induced during production of fluid resources from their reservoirs which allows direct 4 dimensional measurements of all or many of the components of the permeability fields as well as other petrophysical rock properties important to reser- voir analysis and monitoring. The seismicity associated with the per- meability field is identified by its spatial and temporal location in two general conoidal volumes (12), sym- metrically disposed about the injec- tion point (14) in any well being used for this purpose. The seis- micity is generated by fractures hy- draulically linked to the injection well and comprises the permeabil- ity field associated with that well. Mapping of the permeability field identified by this means can also be used for guiding the placement of subsequent infill, development and injection wells. In addition by per- mitting the active deformation field to be seen, it allows potential haz- ards to the field infrastructure to be recognized. By predicting the fluid paths, the invention forms an important adjunct to 4D active seismic analysi s which monitors the migration of fluid fronts.
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