Art Original
EVALUASI WATER SHUT OFF MENGGUNAKAN SQUEEZE CEMENTING DALAM MEMBUKA LAPISAN BARU SUMUR X LAPANGAN Y
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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