Opal Plant Overview

Presented to the Wyoming Pipeline Authority

March 23, 2004

WHERE is Opal?

WHY is Opal Expanding?

Williams’ Continued Response to Market Demand Major Export Point for Wyoming Production Liquidity and Demand at the Opal Hub Development of the Pinedale Anticline Infill Drilling in the Jonah Field Future Development of the “Mesa” Renewed Activity in the Moxa Field Kern River 2003 Capacity Expansion Planned Expansion of Northwest P/L Availability of Take-away Capacity on MAPL Opportunity to Partner with Mt. West/Willbros

WHAT is Opal?

Four Cryogenic Processing Plants:

Plant Avg. capacityTXP-1 245 MMcf/dTXP-2 165 MMcf/dTXP-3 380 MMcf/dTXP-4 360 MMcf/d

TOTAL 1,150 MMcf/d

WHAT is Opal?

The Opal Plant also Provides Blending and Dehydration Services:

Processing Blending TOTAL (MMcf/d) (MMcf/d) (MMcf/d)

TXP-1, 2, 3 790 250 1,040

New TXP-4 360 100 460

TOTAL 1,150 350 1,500

…and 1.0 Bcf of glycol dehydration for Jonah/Pinedale.

WHAT is Opal?

Distribution of Throughput Capacity

TXP-1

TXP-2

TXP-3

TXP-4

Blending

WHAT is Opal?

NGL Production for Opal:

Plant Ave. Production TXP-1 14,000 bbl/d TXP-2 7,000 bbl/d TXP-3 24,000 bbl/d TXP-4 11,000 bbl/d

TOTAL 56,000 bbl/d

WHO is Opal?

SUPPLY: The Big Hitters

BP America ChevronTexaco

ConocoPhillips Devon Energy EnCana Oil & Gas EOG Resources ExxonMobil Company Shell E&P Company Ultra Petroleum Co.

Westport Resources

WHO is Opal?

TAKE-AWAY CAPACITY: Interstate Pipelines

(MMcf/d)1) CIG/El Paso 1502) Kern River 1,5003) Northwest 600 (West)

250 (South)

TOTAL 2,500

20% 20% 27% 26% 18% 16% 15% 9% 8%

38% 41%47% 47%

48%43% 39%

41% 36%

40% 36%23% 22%

27%32% 39% 41% 48%

0%

20%

40%

60%

80%

100%

1995 1996 1997 1998 1999 2000 2001 2002 2003

Alberta/Kingsgate British Columbia/Sumas Domestic/Opal

NWPL Supply Diversity

TXP-4 Expansion Diagram

DemethanizerTower

Molecular Sieve Dehydrators

Solar Taurus 70-T10302SRecompressorSite Rated 8,550 Hp

Gas-to-Gas Exchanger

Discharge Gas Coolers

Inlet Filter Separator

Process Building Area with Expander and Plate Fin Exchangers

Product Surge Vessels

NGL Product Cooler

TXP-4 Gas Processing Plant

TXP-4 Site Construction

TXP-4 Demethanizer Tower

Taurus 70 Recompressor

TXP-4 Recompressor Building

Opal Processing Plant Panorama

Warm Wyoming Welcome at Opal