Inverion of 4-C borehole flexural waves to determine anisotropy in a fractured carbonate reservoir

摘要

Observations of anisotropy in fractured carbonate reservoirs can yield important information such as the orientation of aligned crack systems and crack density. A new generation of borehole acoustic tools provides the Data necessary to observe anisotropy around the bore- Hole. The flexural waves, excited by two dipole sources Operating perpendicularly to each other in these tools, Are recorded in two perpendicular directions, resulting In four-component flexural wave recordings.