东营凹陷幔源流体对原油生物标志化合物的影响研究

A large number of mantle-derived fluid activities occurred in the Dongying Sag. On the basis of the studies on the geochemical characteristics of these fluids in this sag, the spatial distribution of biomarkers in petroleum and their relationships with the parameters of mantle-derived fluids were studied, to reveal the influence of mantle-derived fluids on the biomarkers and to evaluate the reliability of these biomarkers when applied to oil-source correlation and maturity analysis. Most biomarkers used in oil correlation kept the characteristics of their sources during burial thermal evolution. Even some of them were not influenced by mantle derived fluids, such as the relative content of C27-C29 steroid（ααα20R）and C21/C23 tricyclic terpane. However, Pr/Ph and C35/C34 hopanes were sensitive to both heat energy and materiel input by the mantle-derived fluids. γ-waxnae/C30hopanes and C24 tetracyclic terpanes /C26 tricyclic terpanes responded only to thermal influence by mantle-derived fluids. They did not chemically reacted with the mantle-derived fluids. Fluorene series compounds reacted with hydrogen and / or carbon dioxide from the mantle. Mantle-derived fluids affected most maturity index. The huge thermal energy with mantle-devied fluids weakened the relationship between the maturity parameters and depth. Among them, pregnane/C27-29 steroid and Ts/(Ts+Tm) were more sensitive to the heat of the fluids. ααα20S/(20S+20R) took the second place. αββ/(ααα+αββ) and 22S/(22S+22R) were not thermally influenced by the mantle-derived fluid. Besides, the substance of mantle-derived fluids reacted with fragrants, hopanes or moretanoids and thus altered the values of MPI1, MPI2, MPR, C30 hopanes/(C30 hopanes + moretanoids) and alkyl-diben zothiophene/diben zothiophene. The thermal alernation of phenanthrene series and their spatial distribution show that the heat energy carried by mantle-derived fluids was not fierce but spread widely in Dongying Sag, which is favorable to hydrocarbon generation with little destroy. In sum, mantle-derived fluids affected biomarkers through thermal energy and chemical reactions and changed the values of oil-source correlation and maturity parameters in the deep-seated fault belts. Therefore, in the deep-seated fault belts, oil-source correlation should be restudied and the new parameters need to be explored.

广州地区气溶胶有机质的定量研究

本文以采自广州郊区、市区及交通枢纽区的气溶胶样品为对象，首次定量（部分半定量）分析了可溶有机质中烃类、脂肪酸及酮类的组成。广州地区气溶胶类脂物的产率范围10.66 ～ 73.90μg/m~3，主要由燃料残余物、植物蜡及少量的多环芳烃组成。植物蜡组份的存在可由>C23的正构烷烃的锯齿型分布、微量倍半及二萜类（如卡达烯、α－雪松烯）的存在等特征来判定；石油残余物可由低分子量烃类含量增多、总烃中鼓包的存在、地质上成熟的藿烷类及甾类的分布等特征来识别；微生物对气溶胶有机质的贡献主要体现在