松辽盆地白垩纪孢粉颜色指数与有机质成熟度  

THERMOMETAMORPHISM OF POLLEN IN DAQING OIL FIELD

作　　者：赵传本[1] 

机构地区：[1]大庆油田科学研究设计

出　　处：《地球化学》1981年第3期301-307,共7页Geochimica

摘　　要：The relatiouship between posen colour and the degree of maturity of organic material is discussed with regard to petroleum formation and evolution as typified by Daqing oil field in Cretaceous system, central Songliao basin, Northeast China. Colour variation of pollen is considered as a function of sedimentary environment and metamorphism. Pollen colour is divided into seven grades and the degree of metamorphism is studied in terms of this colour index. Results show that the pollen colonr index of the strata at depth of 1000-3000m (stratigraphieally from the first section of Liangjiang formation to the upper Quantou formation) ranges from 2.5 to 5, corresponding to an ancient temperature of 60--140℃. This is the most.optimum strata for oil-generation. Strata beneath the lower Quantou formation under 3000 m with colour index in excess of 5 and ancient temperature of over 140℃ should be favorable for gas accumulation. For strata at shallower depth than 100O m, stratigraphically above the second section of Liengjiang formation, which is characterized by a colour index of 1--1.5 and a temperature of lower than 600℃, the maturity degree is lower than that necessary for oil-generation.The relationship between pollen colour and the degree of maturity of organic material is discussed with regard to petroleum formation and evolution as typified by Daqing oil field in Cretaceous system, central Songliao basin, Northeast China. Colour yariation of pollen is considered as a function of sedimentary environment and meta-morphism. Pollen colour ,is divided into seven grades and the degree of metamorphism is studied in terms of this colour index. Results show that the pollen colour index of the strata at depth of 1000-3000 m (stratigraphically from the first section of Liangjiang formation to the upper Quantou formation) ranges from 2.5 to 5, corres-ponding to an ancient temperature of 60-140℃. This is the most optimum strata for oil-generation. Strata beneath the lower Quantou formation under 3000 m with colour index in excess of 5 and ancient temperature of over 140℃ should be favorable for gas accumulation. For strata at shallower depth than 1000 m, stratigraphically above the second section of Liengjiang formation, which is characterized by a colour index of 1-1.5 and a temperature of lower than 60℃, the maturity degree is lower than that necessary for oil-generation.

关 键 词：白垩纪 孢粉颜色指数 松辽盆地 有机质成熟度 孢粉化石 

分 类 号：P534.53[天文地球—古生物学与地层学] P575.6[天文地球—地质学]