DRILLBYTE MUD HYDRAULICS ANALYSISClient GNPOCWell Balome-2Data Printed on Sat Apr 24 22:05:08 2004

INPUT DATA

Bit Depth : 3441.00 m Hydraulics Model : Power Law Weakest Fmtn Depth : 2185.00 m Mud Density : 1.26 g/cc Fracture Gradient : 1.69 g/ccMax Allowed Flow Rate : 420 gal/min PIPE ANNULUS Max Allowed Pressure : 2800 psi Power k 12.4062 12.4062 #sec^n/Cft^2 Actual Flow Rate : 420 gal/min Power n 0.31922 0.31922 Rate of Penetration : 4.00 m/hr PV 22.00 22.00 cP Cuttings Density : 2.50 g/cc YP 32.00 32.00 Pa Cuttings Diameter : 0.250 in 300 rpm 88 88 Cuttings Shape : Spherical 600 rpm 110 110 Cuttings Thickness : - Bit TFA : 0.8038 in^2 Bit Nozzles : 18,18,20

BASIC RESULTS @ 420 gal/min

Section HOLE PIPE VOLUMES/CAPACITIES VELOCITIES Flow Top diam OD ID Hole Pipe Annulus Slip Annulus Critical Regime m in in in bbl bbl bbl m/min m/min m/minSurface 8.835 5.000 4.252 543.6 125.9 369.5 3.50 59.14 233.53 LAM2185.00 8.500 5.000 4.252 183.6 45.9 120.1 3.97 66.41 237.71 LAM2982.39 8.500 5.000 2.795 100.6 10.9 65.8 3.97 66.41 237.71 LAM3419.29 8.500 6.890 2.874 3.1 0.4 1.1 8.41 126.63 276.04 LAM3432.70 8.500 6.772 1.454 1.9 0.1 0.7 7.94 118.90 272.34 LAM

VOLUMES

Annular Volume : 557.1 bbl Pipe Capacity : 183.1 bblCirculating Volume : 740.2 bbl Pipe Displacement : 92.5 bblTotal Hole Volume : 832.8 bbl Hydrostatic Pressure : 5447 psi

RESULTS AT VARIOUS FLOW RATES

(MINIMUM) (ACTUAL)Flow Rate gal/min : 25 420Flow Regime at TD : LAMINAR LAMINARJet Velocity ft/sec : 9.9 167.6Impact Force lbf : 1.3 383.5Hydraulic Power hhp : 0.0 64.7Power/Area hp/in^2 : 0.0 1.2Bit Loss psi : 1 264% Bit Loss : 0.1 12.6Pipe Loss psi : 335 1105Annular Loss psi : 291 719Cuttings Loss psi : 186 10Surface Loss psi : 0 8MWD Loss psi : 2 11Motor/Turbine Loss psi : 6 102Total Loss psi : 813 2106Circ Pressure psi : 5925 6176ECD @ TD g/cc : 1.33 1.43ECD @ Shoe g/cc : 1.32 1.40ECD @ Weakest Depth g/cc : 1.32 1.40

COMMENTS

ECD @ TD (cuttings) g/cc : 1.37 1.43At a Flow rate of 420 gal/minRecommended Minimum Flow to maintain cuttings transport is 25 gal/minRecommended Maximum Flow to maintain laminar flow is 916 gal/min