Field data collection

From the left: Lars Bjarne Røvang, Sigrid Volden Slungaard, Sveinung Erland, Thomas Djønne and Knut Bendik Christiansen.

The respective operators report updated volume profiles with associated compositions to Gassco for no less than 184 fields and discoveries on the Norwegian continental shelf (NCS).

This Gassco main data collection (GMDC) exercise is coordinated with the revised national budget (RNB) process conducted by the Norwegian Petroleum Directorate (NPD). This acquires data from all fields and discoveries, while the GMDC covers only those which contain gas.

Conducting quality assurance of all the spreadsheets received by Gassco is a considerable job. Thomas Djønne, who is responsible for the GMDC process, has put together a solid team to deal with the information in a good and efficient manner. Personnel from all the company’s units are involved.

A significant proportion of the projects in Gassco relate to the need for transport or processing of natural gas. To determine the commercial impact of a project, a base volume – the expected quantity of gas to be used in the calculations – must be obtained.

The GMDC provides the input for defining various types of base volumes. Generic bases are established which the project groups can use as the starting point for their analyses. A group generally wants to establish specific sensitivities, and the base volume is then usually adjusted for the relevant project.

Using the right base volume for the right purpose is important. Gassco’s annual transport plan is usually the first project to utilise updated base volumes from the GMDC.

New tools
Gassco has now adopted the Oracle Business Intelligence Enterprise Edition (OBIEE) as a new computer tool to help carry out quality assurance of the data in a more efficient way. This simplifies visualisation of the data and will provide useful answers to the question of how Gassco can continue to optimise the process.

Profiles to 2088
Gassco now asks the operators to provide data right up to 2088 – in other words, a 70-year perspective compared with the 25-year horizon used earlier. It also acquires information about resource class 7. This means that Gassco learns where the operators have made discoveries which have yet to be fully evaluated.

These resource estimates accordingly involve greater uncertainty, but nevertheless provide valuable knowledge for discharging Gassco’s architect role.

The company’s goal is to improve its products continuously in close dialogue with the field operators.