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Название: PRIMARY PETROLEUM MIGRATION BY MOLECULAR SOLUTION: CONSIDERATION OF NEW DATA
Автор(ы): Leigh C. Price
Аннотация: Previous criticisms of primary petroleum migration by molecular solution have been: (1) the large compositional and molecular weight differences between hydrocarbons most readily dissolved in water and those found in crude oils, and (2) previously-measured aqueous petroleum solubilities were not high enough to account for petroleum deposits using reasonable geologic assumptions. New crude oil aqueous solubility data remove both of these criticisms. Above 275°C, with both increasing gas content and temperature, the solute hydrocarbons become compo-sitionally more and more similar to, and eventually exactly match, the starting material. Mass balance calculations, using experimentally-measured crude oil solubilities, show that between 275° and 375°C, under realistic geologic assumptions, crude oil aqueous solubility is high enough to account for petroleum deposits. These new data also show that molecular solution is not a viable agent of primary petroleum migration below 275°C. Although the new data remove these two criticisms, three others are immediately raised: (1) there is inadequate water in sediments at temperatures between 275° to 375°С for migration by molecular solution, (2) sediment hydrocarbons will be thermally destroyed by these temperatures, and (3) these high temperatures are not present in most petroleum basins. Consideration of existing data suggests these criticisms can be satisfactorily answered. It is therefore concluded that a deep-hot origin of petroleum and its migration by solution could fall within the restraints of the natural system. It is possible much or most of the world's oil has undergone primary migration by molecular solution; however two other mechanisms may also be viable: gaseous solution, and in the case of extremelv rich source rocks, some form of a bulk phase migration.
Библиографическое описание: PRIMARY PETROLEUM MIGRATION BY MOLECULAR SOLUTION: CONSIDERATION OF NEW DATA//Leigh C. Price - Journal of Petroleum Geology, 4, 1, pp. 89-101,1981
Тип публикации: статья
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