In May 2002, PanCanadian Petroleum Limited and Alberta Energy Company Ltd completed their previously announced merger, creating EnCana Corporation.  EnCana is North America's largest independent natural gas producer and gas storage operator. Ninety percent of the Company's assets are in four key North American growth platforms. EnCana is the largest producer and landholder in Western Canada and is a key player in Canada's emerging offshore East Coast basins. In the U.S., EnCana is one of the largest gas explorers and producers in the Rocky Mountain states and has a strong land position in the deepwater Gulf of Mexico.

Both PanCanadian and Alberta Energy Company were clients of eXigent prior to the merger.  PanCanadian had previously acquired the exploration, production, midstream and marketing assets of The Montana Power Company, including the gathering and processing facilities held by its subsidiary, North American Resources Company (NARCO)

NARCO and its successors have been using the GPIS system since 1997 to account for its gas gathering and processing facilities in the D-J Basin in Colorado and the Cut Bank area of Montana.  In June 2002, Encana acquired the Dragon Trail Gas Plant, located in the Piceance Basin of Colorado and Utah, from El Paso Field Services.  The accounting for this processing plant was converted by eXigent from the TIPS system used by El Paso to the GPIS system.

A modified budgeting version of the GPIS system has been used by NARCO to generate detailed 12 month budgets by applying reservoir engineering volumetric projections against existing and projected contractual obligations and allocation methodologies.

Vintage Petroleum, Inc. is a large international energy company headquartered in Tulsa, Oklahoma.

Vintage installed the GPIS system in February 2000, after acquiring a gas processing plant in the Ventura Onshore area of California.  The previous operator of the plant was using the TIPS system to account for the plant and data from the TIPS system was converted over to the GPIS system by eXigent.

CMS Energy, Inc. is a leading world-wide vertically integrated energy company with assets throughout the energy value chain ranging from exploration and production to power distribution.

CMS Field Services, Inc, a wholly owned subsidiary, entered into a license agreement with eXigent and installed the GPIS system in January 2001.  CMS Field Services, Inc. located in Tulsa, Oklahoma, operates four gas processing plants in Oklahoma and Texas.  In August 2003, CMS sold substantially all of its assets, to Cantera Resources, Inc.

Canyon Gas Resources, an affiliate of Cantera Resources, Inc., acquired four gas processing plants and six gathering systems primarily in the Piceance basin of western Colorado and eastern Utah from Tom Brown, Inc.  Canyon Gas Resources, Inc. is headquartered in Denver, Colorado.

The GPIS system was installed by Canyon Gas Resources, Inc. in August 2001.  As part of the installation, eXigent customized the system to track and maintain wellhead nominations, pipeline nominations and shipper imbalances.  In addition, eXigent customized the system to handle certain gathering contracts that had contractual limits on the amount of fuel, loss and unaccounted for gas that could be charged to the shipper.

Cantera Resources, Inc. is a Dallas, Texas based energy company.  In August 2003, Cantera acquired assets from CMS Field Services, Inc., including three of the four gas processing plants operated by CMS Field Services, Inc.   Cantera is continuing to use the GPIS system to account for the plants acquired from CMS.

Enogex Inc., a subsidiary of OGE Energy, is a non-regulated natural gas gathering, processing, transportation, production, and energy services company with principal pipeline operations in Oklahoma, Arkansas, and Texas. OGE Energy also is the parent of Oklahoma Gas and Electric Company, a regulated electric utility with nearly 700,000 customers in Oklahoma and western Arkansas.

After a pilot project, Enogex, Inc. acquired a license for the GPIS system in April 2002.  Extensive customization of the system, including an interface with existing legacy systems for source information, was necessary to account for the unique transactions and contractual obligations for seven straddle gas plants owned and operated by Enogex.  Final testing of the system was completed in July 2002 and Enogex went live on the system in August, for July business.

In April 2003, Frontier Energy Services, LLC acquired a license for the GPIS system from eXigent.  Frontier had recently acquired the Kelton Gas Plant, located in Texas, from Questar Pipeline Company.  Frontier is a midstream energy company located in Tulsa, Oklahoma.

Frontier subsequently acquired the Maljamar Gas Plant, located in New Mexico from Conoco-Phillips in August 2003.  eXigent converted the data from the TIPS system used by Conoco to the GPIS system.

As part of the GPIS installation, eXigent created CDEX revenue files on monthly settlement statements for import into the OGSYS oil and gas accounting software used by Frontier.  

Omimex Canada, Ltd. acquired a license to GPIS in November 2003, after acquiring certain gathering facilities located in Montana from EnCana Oil and Gas (USA) Inc.  These gathering systems had been previously accounted for by EnCana in GPIS.

Aka Energy Group, LLC is a midstream energy subsidiary of the Southern Ute Indian Tribe.  In February 2003, eXigent and AKA entered into an agreement whereby eXigent would perform settlement accounting services, using the GPIS system, for the Gilcrest Gas Plant, located in Colorado.  AKA had recently acquired the gas plant from Southwestern Production.  As part of the agreement, AKA has the right to acquire a license to the GPIS system in the future.

Aka subsequently acquired Frontier Field Services, LLC, including the Kelton and Maljamar Gas Plants.  As part of the acquisition, Aka entered into a management agreement with Frontier Field Services, LLC, whereby Frontier will continue to operate and manage the Kelton and Maljamar Gas Plants, which are accounted for in the GPIS system.

Buena Vista Hills, LLC is a joint venture managed by Crimson Resource Management with offices in Denver, Colorado.  Buena Vista Hills owns and operates a gas processing plant and associated wells in the Elk Hills area near Bakersfield, California.

Since July 2000, eXigent has performed the settlement accounting activities for the gas processing plant on an outsourced basis.

Whiting Petroleum Corporation is engaged in oil and natural gas exploitation, acquisition and exploration activities primarily in the Gulf Coast/Permian Basin, Rocky Mountain, Michigan and Mid-Continent regions of the United States. 

In October 2002, Whiting Petroleum Corporation acquired oil and gas assets from Romer Swanson Energy Company ("RSEC"), an independent oil and gas company located in Denver, Colorado.  The assets acquired by Whiting included two gas processing plants located in Michigan originally acquired in December 2000 by RSEC from Marathon Petroleum.  

eXigent has performed the settlement accounting activities for these plants, using the GPIS system, on an outsourced contract basis since the original acquisition by RSEC. 

Luff Exploration Co. is an independent oil and gas exploration and production company with headquarters in Denver, Colorado.  eXigent developed a database application for Luff that captures field operation data including well operations and well servicing activities.  In March 2004, eXigent completed and installed a database application to track and maintain land agreements (lease and surface type agreements) for Luff.