![]() The transport capacity of the Norwegian pipeline network is currently about 120 billion Sm 3 dry gas per year. This is a cost-effective and reliable way of transporting gas, and gives Norwegian gas a substantial competitive edge. From dedicated gas transport solutions for individual fields, it has been transformed into an integrated system serving most of the Norwegian continental shelf. Norway’s first large pipelines were laid early in the 1970s, and since then the Norwegian gas transport system has been developed to meet ever-expanding needs (see Gassco’s interactive map of the transport system). This results in efficient recovery of the oil, and the gas is stored for possible recovery in the future.Ī characteristic feature of gas production is that major investments are needed in transport infrastructure. Reinjection is often used to maintain reservoir pressure and displace the oil. On some fields, gas is reinjected into the reservoirs. ![]() Some of the gas is used to generate power on the fields, and small amounts are flared for safety purposes. Naphtha and condensate are liquid at room temperature, while the lighter wet gas components can be made liquid either by cooling or adding pressure. In addition there are heavier condensates which some classify as a separate product. Wet gas, or NGL (Natural Gas Liquids), consists of a mixture of heavier gases (ethane, propane, butanes and naphtha). Dry gas is often referred to as natural gas, and consists mainly of methane, but also a little ethane. When necessary, the gas is separated from the oil before the rich gas is treated in a processing facility that separates the dry and wet gas components. Rich gas, or crude natural gas, is a mixture of various gases. The composition varies from field to field, and the quality of the oil, including how light or heavy (viscous) the oil is, depends on the composition of the hydrocarbons as well as the contents of other substances, such as wax and sulphur. ![]() The production from different reservoirs varies from oil with low gas content to almost dry gas (methane with only small amounts of other gases).Ĭrude oil is a fluid that is a combination of different types of hydrocarbons. To get marketable products, the production from the reservoirs must be separated and treated. The production (well stream) from different reservoirs contains oil, gas and water in various combinations. ![]()
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