Production logging in horizontal wells has been challenging due to phase stratification and complex flow regimes. New technologies were introduced to properly characterize such flow dynamics; however, adding a new complex completion strategy, such as a slotted liner, raises the challenge to a new level. When a slotted liner is not equipped with a hanger, two flow paths become possible—one inside the slotted liner and the other outside it—with possible fluid exchange between the two paths. Production logging tools can only see the inner flow. The lack of information about the outer flow raises uncertainties about the real producing zone(s) and may affect the success of future well intervention operations.

We describe a new methodology that combines multiphase production logging measurements with distributed temperature survey data. Both sets of data were acquired simultaneously during conveyance of the production logging tool on coiled tubing. The production logging data offers insights into phase distribution and enables production profiling inside the slotted liner; distributed temperature data solves for total formation production. Combining the two interpretations enables quantification of flow in each of the two paths and helps identify the fluid exchange between them, which would otherwise be misinterpreted as fluid entry from the formation. The result of this integrated interpretation methodology is accurate determination of zonal contributions.

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