Abstract

In this paper, ALFA-TEMP-CFS SPINNER logs were carried out in a well-A at a Libya oil field. The intervention objectives were to identify the production profile across the perforation intervals, determine casing integrity, evaluate any flow behind the casing to identify any source of leakage within the wellbore and evaluate the cross-flow profile (if any), under shut-in conditions. The data was acquired through the interval from 9,800 to 10,144 ft.MD. The interpretation results indicated that there is formation activity and a possible casing leak is detected within the interval 10,051 – 10,058ft. In addition, the pressure and temperature at 10,082 ft. MD under shut-in long term 3,446.8 psi, flowing low rate 3,394.3 psi and Flowing High rate 3,386.0. Moreover, the PLT calculation was determined by KAPPA Ea. MERAUD utilizing water hold-up sensor with 0-5% (air) and 100% (water) calibration values with correlation for the water-hydrocarbon vertical producer as well as PVT data provided by the client. Spinner data shows a huge production rate across the two bottom perforations with approximately equal rate distribution. The qualitative water hold-up analysis demonstrates a very weak hydrocarbon response across perforation interval number 6 and drastic hydrocarbon presence across interval 5 with almost equal rates as mentioned above. Across production zones above perforation, interval number 5 and 6 water hold-up shows a response change towards hydrocarbon with a production rate of 30% from the total value only. KAPPA calculation results match with qualitative data analysis. In addition, the Temperature and Spectral Noise tool confirmed PLT sensor results. According to the flowing ALFA and Temperature data, there is approximately equal production from PERF5 and PERF6. Long-term-shut-in temperature shows the same heated gradient within the interval 11,814 – 11,840ft this might be associated with through formation communication between the bottom water saturated reservoirs, this job has been completed successfully by PETECS company (www.petecs.com).