before the development of the north sea oil fields
41heavy oil and tar sand — Introduction crude oils (crude oil) below 20° API gravity are usually considered to be heavy. The lighter conventional crudes are often waterflooded to enhance recovery. The injection of water into the reservoir helps to maintain reservoir… …
42History of the Netherlands — This article is part of a series Early History …
43harbours and sea works — Introduction harbour also spelled harbor any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… …
44work, history of the organization of — Introduction history of the methods by which society structures the activities and labour necessary to its survival. work is essential in providing the basic physical needs of food, clothing, and shelter. But work involves more than the use …
452002 world oil market chronology — *January 1: The OPEC crude oil production quota cuts of 1.5 million barrels per day, announced on December 28, officially go into effect for six months. Crude oil production or export cuts of convert|462500|oilbbl/d|m3/d by five non OPEC oil… …
46Economic geography of the United Kingdom — A lump of coal, surrounded by fish Halford John Mackinder, Britain and the British Seas, 1904 The economic geography of the United Kingdom reflects its high position in the current economic league tables, as well as reflecting its long history as …
47Operation Sea Lion — Part of Western Front of the Second World War Operational scope …
48Cinema of the United Kingdom — List of British films 1888 1919 1920s 1930s 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 …
49Agriculture in the United Kingdom — A combine harvester in Scotland Agriculture in the United Kingdom uses around 71% of the country s land area and contributes about 0.6% of its gross value added. The UK produces less than 60% of the food it eats and the industry s share of the… …
50History of the petroleum industry in Canada — The Canadian petroleum industry arose in parallel with that of the United States. Because of Canada s unique geography, geology, resources and patterns of settlement, however, it developed in quite different ways. The evolution of the petroleum… …
