Color changes of spores and pollen grains from different modern plants and recent sediments of different sedimentary facies with rising temperatures under laboratory conditions have been observed, and correlations hav...Color changes of spores and pollen grains from different modern plants and recent sediments of different sedimentary facies with rising temperatures under laboratory conditions have been observed, and correlations have also been made. Changes in color from yellow through brown to black with rising temperatures are common with respect to all fresh spores and pollen grains either from modern plants or from recent sediments of different sedimentary facies. Nevertheless, at the same temperature there may exist certain differences in color between different sporo-pollen, species. These differences may be attributed to the original differences in the sporoderm thickness and ornamentation of spores and pollen grains. For this reason, sporo-pollen fossils with similar sporoderm thickness and ornamentation are considered as the best candidate to be adOpted in observing their color changes in an attempt to determine the degree of maturation of organic matter in source rocks.展开更多
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...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.展开更多
文摘Color changes of spores and pollen grains from different modern plants and recent sediments of different sedimentary facies with rising temperatures under laboratory conditions have been observed, and correlations have also been made. Changes in color from yellow through brown to black with rising temperatures are common with respect to all fresh spores and pollen grains either from modern plants or from recent sediments of different sedimentary facies. Nevertheless, at the same temperature there may exist certain differences in color between different sporo-pollen, species. These differences may be attributed to the original differences in the sporoderm thickness and ornamentation of spores and pollen grains. For this reason, sporo-pollen fossils with similar sporoderm thickness and ornamentation are considered as the best candidate to be adOpted in observing their color changes in an attempt to determine the degree of maturation of organic matter in source rocks.
文摘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.
