Positive orientation provides 100% FMI image coverage in Iraq

Preventing rotation of imaging tools is desirable to prevent image overlap. This is particularly important in large wellbores where borehole coverage is lower. In 12.25” hole FMI wellbore coverage is only 52%. Whilst repeat passes can be made to try to cover the remaining area, the tool will typically follow the same path each time, leaving a large portion of the wellbore unlogged. In Iraq, Tool Taxis were used to perform two sequential runs in a 12.25” wellbore. The first run with the tool oriented at 0°, and the second run with the tool rotated by 45°. The combined images increased the wellbore wall coverage from 52% to 100% – a vital piece of information in a geologically challenging field. Micro-resistivity imaging tools such as OBMI, FMI and NGI are also negatively affected by stick slip motion caused by overpulls. Petromac Tool Taxis help to smooth the tool motion, and the result is clear, crisp imaging logs. Dual FMI passes at 0° and 45° provide 100% coverage in 12.25” hole Fig.1. Combined passes of Formation Imager at 0° and 45° in 12.25” hole yielded an excellent log, with