Analisis Interpretasi Log Untuk Menentukan Interval Perforasi Pada Lapangan #PWN# Untuk Menurunkan Produksi Air Di Sumur “RS-1”

The RS-1 well has 5 perforation intervals, of which 3 are still in production, namely at a depth of 1080 ft – 1090 ft, 1162 ft – 1168 ft, and 1174 ft – 1184 ft, while the intervals 1184 ft – 1192 ft, 1217 ft -1227 ft have isolated using a cup packer assembly. Where the interval 1080 ft 1090 ft is known to have a 99% water cut, the 1162 ft – 1168 ft interval has a 98% water cut, and the 1174 ft – 1184 ft interval has a 98% water cut. There are several ways that can be used to reduce water production, including water shut-off, recompletion and relative permeability modifier. The method used to reduce the water cut value and increase oil production in the RS-1 well is the recompletion method. Log data analysis of the five intervals needs to be done to determine the performance of the interval. Based on the log data, the five intervals in the RS-1 well were squeezed cementing. Furthermore, the results of the analysis show that the interval of 1080 ft – 1090 ft will not be reproduced based on the consideration of the surrounding wells. . While the intervals 1177 ft – 1180 ft, 1184 ft – 1192 ft and 1217 ft – 1227 will not be reproduced because based on log data analysis it is known that these intervals are not economical because they are in the water zone. The interval to be perforated is the 1162 ft – 1168 ft interval which is seen from the RST log data that still contains hydrocarbons, with an average SO of 18%, an interval of 1173 ft-1177 ft with an average SO of 18% and an interval of 1180 ft-1184 ft with SO on average 30% of the total content before production. After reperforation, it is necessary to determine the critical flow rate of the well. The results of the calculation of the Craft and Hawkins method show that the critical flow rate to prevent water coning is 15.5 bopd while the actual flow rate is 32.65 bopd