Petromac Wireline Express eliminates CMR stick-slip in UAE

In an offshore well in Abu Dhabi, a CMR log was invalid due to the highly irregular motion of the tool in the wellbore (see tension log on left). Fig.1. Tension profile due to stick-slip on tool Fig.2. Tension profile with tool on taxis Conveying a CMR string on Tool Taxis drastically reduced stick-slip motion and improved data quality On the subsequent well the CMR was run on Tool Taxis, which oriented the tool pad down and ensured good contact with the wellbore. In a deviated well with Tool Taxis, the weight of CMR sonde provides sufficient contact force without the addition of bowsprings and PPCs. Removing the bowspring and PPC has the added benefit of helping to further reduce stick slip motion. The data set was devoid of stick slip artifacts on the 2nd well and the log yielded excellent data (see Fig.2). Fig.3.Eccentered Magnetic resonance tool making good pad contact using Tool Taxis