THE HYDROCHEMICAL CHARACTERISTICS OF NON-MARINE OIL-FIELD WATER IN CHINA AND ITS EVOLUTION PATH
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摘要: 储存和循环于含油气盆地的地下水,随着盆地的成生、发育和发展,经历了复杂的水文地球化学过程,水化学成分发生了一系列的变化。本文以大量的油田水化学分析资料为基础,讨论我国陆相盆地油田水化学成分的演变规律。Abstract: Basing on a large number of analytical data, the hydrochemical characteristics of non-marine oil-field water in China and its evolution path are discussed. Along with the generation and development of sedimentary basin, the non-marine oil-field paleowater underwent a series of complicated processes of hydrogeochemical evolution, and eventually transformed into the present status. The hydrochemical composition changed along a main trend with increasing concentrations of anion Cl- and cation Na+. The differences among hydrochemical types depend on the concentrations of secondary ions and the degree of mineralizationi meanwhile, the degree of mineralization and the hydrochemical type show distinct zonation from north to south, reflecting the influences of paleoclimatology and paleohydrochemistry. In addition, the formation, occurrence, and circulation of oil-field water, and the evolution of hydrochemistry accorded with the formation, migration and accumulation of oil and gas. All these were strictly controlled by the second-ordered tectonic elements-sedimentary depressions-within the petroliferous basins and thus appeared as a single complex during hydrochemical evolution. This is an important characteristic of non-marine oil-field water.
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[1] 刘崇禧,我国油田水的离子组合特征,地球化学,第2期,1978年. [2] 中国科学院地质研究所,数学地质引论,地质出版社,1977年. [3] 陈发景等,我国第三纪含油气盆地的沉积建造类型和油气分布,地质学报,第3期,1980年. [4] 段永侯等,准噶尔自流盆地的水文地质特征,地质学报,第1期,1964年. [5] 刘崇禧,我国东部某油田水文地球化学特征,地球化学,第3期,1980年.
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