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Sistem Sirkulasi Lumpur Pemboran

Lost Circulation

Penyebab

  • Pemompaan yang mengejutkan
  • Tekanan pompa terlalu tinggi
  • Lumpur terlalu kental
  • Gel strength terlalu besar

Pencegahan

  • Penggunaan bahan penyumbat
  • Menjaga berat lumpur tetap minimum

Volume Lumpur pada Trayek 17.5" Kedalaman 1004.90m

Volume Displacement

OD² - ID²

V = x L

1029.4

= 41.125 bbls

Volume Sring

ID²

V = x L

1029.4

= 52.712 bbls

Volume Lubang

OH²

V = x L

1029.4

= 708.069

Volume Annulus

V = V lubang - (V displacement + V string)

= 614.232 bbls

Waktu Sirkulasi Lumpur

Diameter liner pompa = 6"

Panjang liner pompa = 9.25"

Efisiensi pompa = 96%

SPM pompa 1, 2, dan 3 = 96 spm

Pump Output = 0.000243 x d² x p x efisiensi

= 0.0777 bbl/stroke

V string

Down stroke =

Pump Output

= 678.404 stroke

V annulus

Lag stroke =

Pump Output

= 7905.173 stroke

Down stroke + Lag stroke

Surface to surface time =

SPM1 + SPM2 + SPM3

= 29 menit 48 detik

Sistem Sirkulasi Lumpur Pemboran

Volume Sirkulasi Lumpur pada Trayek 17.5" dan Gangguan Operasinya

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