| 摘要 |
A method to post process strain data records acquired by fiber optic instrumentation from Oil and Gas borehole oil well casing or similar installations is provided. A fiber optic Distributed Strain Sensing (DSS) system acquires strain records and a Distributed Temperature Sensing system (DTS) acquires temperature records along the length of the casing. The temperature records are used to derive the strain contributed by temperature which are then subtracted to obtain temperature corrected strain records. The cables are secured to the casing at each collar interval. Permanent strain variations between intervals are caused during the installation and show up as noise on the strain records. These static strain variations obscure new strain variations that are caused by structural movement that the installation is intended to measure. The temperature-corrected strain records are then processed with a digital low pass filter to expose movements in the micro-strain range. |
