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Enron Mail |
This is in response to your request of 3-26-2001 regarding the expansion of TW pipeline system in West Texas. Current Facility Capacity Summary Compression capacity at WT-1= 420 mmcf/d Compression capacity at WT-2= 550 mmcf/d Pipeline capacity from WT-1 to Station-9= 550 mmcf/d Pipeline capacity from WT-2 to WT-1 flowing north= 250 mmcf/d ( when WT-1 operates at 950#). Pipeline/ compression capacity at WT-2 flowing south 550 mmcf/d Two scenarios have been considered in order to increase the capacity of WT-1 and WT-2 from 550 to 750 mmc/fd flowing north to Station #9 and west to Station #8. Scenario-1: The following assumptions have been made for this scenario: Gas supply availability WT-1 307 mmcf/d ( i.e.Atoka=150, Maljamar=45, GPM Zia=30 mmf/d and Crawford =82 mmcf/d). Elpaso 90 mmcf/d NGPL Eddy 40 mmcf/d From WT-2 to WT-1 250 mmcf/d Duke (WT-1 discharge) 63 mmcf/d Total 750 mmc/d Criteria used for hydraulic modeling were: Suction pressure at WT-1 =615 psig Zia pressure =650 psig. WT-1 discharge =950 psig. WT-2 discharge =1030 psig. Suction pressure at Station-9 =750 psig. Station-8 Ps=725 psig and Pd =1000 psig Facility requirements and the associated costs ( level "A" release 30%?): Loop the existing 24" (discharge side of WT-1) with 18.50 mi of 36". $20,000,000 Add a 4000 hp booster unit on 36"/24" 23 miles north of WT-1. $5,000,000 Add a 4000 hp at Station-8 (current capa=590 mmcf/d). $5,000,000 Total cost of scenario-1 $30,000,000 Scenario-2: Assumptions: Available supply at WT-1 307 mmcf/d NNG-Waha area to WT-2 443 mmcf/d Total 750 mmcf/d Criteria used for hydraulic modeling were: Suction pressure at WT-2 = 710 psig. NNG-Waha pressure = 870 psig. Discharge pressure at WT-2 = 1032 psig Suction pressure at WT-1 = 615 psig Discharge pressure at WT-1 = 900 psig Suction pressure at Station-9 = 735 psig Sation-8 Ps=725 and Pd =1000 psig Facility requirements and the associated costs ( level "A" release ?30%): 10 miles of 24" looped with 12"-Halley lateral and $ 800,000 interconnect facilities at TW/NNG Halley interconnect. 10.44 miles of 30" looped with 24" discharge side of WT-2. $ 9,000,000 Add a 6000 hp booster unit on 36"/24" 23 north of WT-1. $ 7,500,000 18.50 miles of 36" looped with the existing 24" (WT-1 discharge) $ 20,000,000 Add 4000 hp at Station-8 (current capa= 590 mmcf/d) $ 5,000,000 Total cost of scenario-2 $42,300,000 Note: This is a preliminary scope and cost estimate and no discussions on the facility specs were made to other internal or external units at this time. If you have any questions please call me at #33158.
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