Abstract
Production logging, especially in highly deviated, horizontal wells still exhibits challenges due to multi-phase, complicated flow regimes in undulating long well bores in open hole completions. Because of the advances in measurement technology and interpretation techniques, production logging objectives can be achieved in more challenging conditions; the improved confidence in the result is crucial to associated decisions and well interventions.
In this paper, we present four field examples that used the latest technological advances and the best practices in integrated production logging in horizontal wells with openhole completions using either coiled tubing or tractor conveyance. The first example detected a super-permeability zone and a changing water salinity profile in the wellbore. The second example identified crossflow in a shut-in multilateral well; subsequent workover revived the oil production to initial production levels. The third example provides a discussion of the effective design of tractor-conveyed horizontal production logging to identify water entry and define the flow profile. The last example relates the first use of a new, compact, integrated production logging tool that pinpointed water entries in a horizontal openhole completion. This compact production logging system provides comprehensive, continuous data for the analysis of complex horizontal flow behavior.
The results of these field examples show how the application of the latest advances in horizontal production logging operations can significantly improve our understanding of well behavior and reservoir characterization. Combining these advantages with effective remedial action and workover operations can increase production and extend the life of horizontal openhole producing wells.
