BAB IVPENGUMPULAN DAN PENGOLAHAN DATA

4.1 Data Di Lapangan Matoa MT-30Berikut adalah perhitungan untuk Sumur MT-30. Data yang digunakan untuk perencanaan ini diambil pada tanggal 13 Maret 2015. Water-Cut ( WC ) = 98,4 % Laju Alir Minyak(Qo) = 112 BOPD Laju Alir total (QL) = 7000 BFPD Water Specific Gravity (SGw) = 0,984 Oil Specific Gravity (SGo) = 0,013 API Gravity = 38 Static Fluid Level (SFL) = 0 ft Working Fluid Level (WFL) = 3500 ft Tekanan Tubing = 180 Psi ID Tubing = 6.2 inch Kedalaman Sumur = 9656 ft Mid Perforasi (Datum) = 9585 ft Qtest = 3749 bpd Pstatik = 4221 psi Productivity Index = 18.92 bfpd/psi Pwf = 4022 psi Qmax = 45309 bfpd Top Perforasi = 9686 ft Mid Perforasi (Datum) = 9585 ft Pump Setting Depth (PSD) TVD = 4000 ft Tubing Friction 2 = 2.14 Tubing Friction 2 = 2.44 Tubing Friction 3 = 3.44.2 Perhitungan4.2.1 Penentuan Specific Gravity Fluida 1. Specific gravity air = Water Cut x SG Air = 0,984 x 1 = 0,984 2. Specific gravity minyak = Oil Cut x SG minyak= (1-0,984) x 0,792 = 0,013 3. SG Fluida Campuran = SG air + SG minyak = 0,984 + 0,013 = 0,997 4. Gradient Fluida (Gf) = SG Fluida Campuran x 0,433 Psi/ft = 0,997 x 0,433 Psi/ft = 0,44 Psi/ft

4.2.2 Penentuan Kapasitas Produksi Sumur Max Head Drawdown (ft) = Top Interval - Static Fluid Level= 9585 ft 0 ft = 9585ft Max Fluid Gradient Drawdown (psi) = Max Head DD x Avg Fluid Gradient= 9585 ft x 0.433 psi/ft= 4221 psiMax Flow = Max FG DD x Productivity Index= 4221 psi x 18.92 bpd/psi= 79854 bpdHead Friction = 2.0830 []Head Friction 2= 2.0830 []= 688 ft loss/ 1000ftHead Friction 2= 2.0830 []= 363 ft loss/ 1000ftHead Friction 3= 2.0830 []= 72 ft loss/ 1000ft

4.2.3 Perhitungan Total Depth Head di 7000 bpd1. Productivity Index= = = 18,92 bpd/psi2. Pressure Drawdown= Q req / Productivity Index = 7000 bpd / 18.92 bpd/psi = 370 psi 3. Head Drawdown = Pressure Drawdown /Average Fluid Gradient = 370 psi/ 0.44 psi/ft = 840 ft 4. Flowing Fluid Level = Pressure Drawdown + Fluid Level Static= 840 ft + 0= 840 ft5. Friction Loss 2 @7000bpd= Pump Depth x = 4000 ft x = 1451 ft5. Well Head Pressure Loss = Well Head Pressure / FG Salt Water= 180 psi / 0.44166 = 408 ft6. Total Depth Head= Flowing FL +Frict Loss + WHP Loss= 840 ft +1451ft + 408 ft= 2699 ft4.2.4 Perhitungan Jumlah Stage Pompa yang dibutuhkan1. Head Pompa QN-70= 56 ft/StagesJumlah Stages= = = 48 Stages

4.2.5. Perhitungan Daya yang dibutuhkanDaya yang dibutuhkan Pompa = 1.8 hp/stage Total Daya yang dibutuhkan Pompa= Jumlah Stages x Daya yang dibutuhkan Pompa= 48 Stages x 1.8 hp/stage= 88 hpMax Shaft Rating = 140 hpMax Head Operating Range= Total Dynamic Head= 2699 ftMax Pressure Operating Range= Total Dynamic Head x Average Fluid Gradient= 2699 ft x 0.44= 1192 psiMax Housing Pressure rating= 5000 psi

4.2.6 Perkiraan Pump Setting Depth (PSD)1. Pump Setting Depth Minimum = Working Fluid Level + = 3500 ft + = 3909,1 ft

2. Pump Setting Depth Maximum = midfer - = 9585 ft - = 9175,9 ft Gambar 4.1 Variasi kedalaman pompa pada sumur

4.3 Pembahasan

IV-5