Pratama, R. Fikri (2025) Evaluasi Water Shut Off Menggunakan Squeeze Cementing Dalam Membuka Lapisan Baru Sumur X Lapangan Y. Other thesis, Universitas Islam Riau.

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Abstract

Increase in water production is a problem that often occurs in oil production wells. This is due to the length of time the well has been producing or the damage that occurs in the production well formation. Well x is an oil well that was first produced since 1984 with an initial production of 2279 BOPD with a water cut of 0.14%. With a vertical well type, the total depth is 2300 ft. There are 4 perforations at the beginning of production, namely at intervals, 2104-2109 ft, 2112-2122 ft, 2133-2138 ft, and 2144-2154 ft. However, as time goes by the water cut of well x increases, the results of the K.S chan diagnostic plot analysis on well “X, the graph shows the slope between WOR and WOR derivative indicating water coning. Log interpretation of well x in Y field using GR log shows 6 perforation points with low values (deflection to the left) indicating that the layer is a permeable zone, while the SP log curve on the track shows a change towards positive deflection of the shale baseline indicating a shale zone. In the calculation of the volume of cement slurry well x has 5 perforation points, in the results of the author's calculation the number of barrels used for cementing is 98.04 bbl with 380 sacks of cement. of course, the difference in the amount of cement volume required between the author's results and the actual calculation data. This is because the actual calculation uses 50% excess volume for safety reasons. The production optimization carried out is to carry out water shut off work, it can be concluded from the production data 2 years before and 2 years after the squeeze cementing operation that the purpose of the squeeze cementing operation, namely water shut off, has been achieved. The value of water cut in well x is reduced to 31% watercut, the value of water production is reduced to 825,758 bbl/day, and the value of oil production is increased to 6159 bbl/day.

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