检索结果-南通市图书馆

DISCOVERY OF C_(30)-steranes IN TERTIARY SEDIMENTS OF SALINE LAKE FACIES

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1989年第11期34卷 933-936页

作者：黄第藩张大江姜春庆 Research Institute of Petroleum Exploration and Development Beijing

Moldowan first reported the identification of C30-steranes. He is of opinion that C30-steranes are novel markers for marine petroleum and sedimentary rocks. Subsequently, the same author, in another paper, further suggested that as a reduced product of early diagenesis, the C30-steranes may be principally derived from propylidene-cholesterol widespread in marine organisms such as diatom,

关键词： C30-steranes 4-methyl steranes biomarker saline lake facies.

GEOCHEMISTRY OF PETROLEUM MIGRATION DURING THE FORMATION OF KARAMAY OIL FIELD

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 1990年第1期33卷 87-97页

作者：黄第藩李晋超张大江 Research Institute of Petroleum Exploration and Development Ministry of Petroleum Industry Beijing 100083 PRC

The phenomena of geochemical migration during the formation of the Karamay Oil Field have been revealed by correlating the compositions of non-hydrocarbon, asphaltene, steranes and terpanes from between oils and rocks. The study on abnormal compaction observed in a deep well, which is located between the source area and the oil field, and the corresponding depletion of hydrocarbons further clarifies the conditions of the migration of oil and gas. Results show that the necessary condition for the formation of this giant oil field is a long distance of lateral migration of oil and gas followed by a redistribution along Ka.-Ur. large fault before accumulation in a large uplift.

关键词： Karamay Oil Field oil-migration geochromatography steranes uncompaetion.

The Diagenesis of Plant Lipids during the Formation of the Krepoljin Coal Basin(Serbia)—Using Multivariate Statistical Analysis in the Saturated Biomarkers

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2008年第6期82卷 1168-1178页

作者： Gordana DEVI Branimir JOVANIEVI Center of Chemistry IChTMNjegoeva 1211000 BelgradeSerbia Faculty of Chemistry University of BelgradePOB 15811001 BelgradeSerbia

The composition of the saturated hydrocarbon fraction of soluble organic matter （bitumen） from the Krepoljin brown coal basin （East Serbia） of Miocene age was investigated. The Krepoljin basin is especially interesting from a geochemical point of view. Namely, by the end of Tertiary Period, the basin was covered by powerful Mesozoic formations of great possibilities, the bedding became hermetically enclosed and protected from subsequent external influences. The nature of early diagenetic processes in the environment with abundant accumulation of organic substance is defined by the molecular content of bitumen through the connections of molecular structures to potential precursors in paleoplant phylla, as well as by the degree of their diagenetic transformations. The hierarchy of parameters based on molecules of saturated hydrocarbons was determined by applying the principal component analysis to the soluble organic matter. The most significant, most ＂loadings＂ values of component CI, are the plant types such as precursors or participants in early diagenetic transformations of steranes Cs27-algal precursor material, Cs28-moulds, Cs29-higher land and water plants; resinous from the group of higher plant gymnosperms （G）; also triterpanes a and β-amirindicotyledonous angiosperms （A） and bacterial and/or terrestrial plants population represented by hopanes/moretanes; as well as the parameters which describe the degree of diagenetic/maturation transformation of precursor biomass, and based on next reactions：（1） shifting of methyl group, influenced by the inorganic sediment constitutents, sterane-rearranged steranes, （2） isomerization in the ring system, ααα→βββ C29 sterane as well as （3） isomerization on chiral center of the side chain sequence R→S C29 sterane S/（S＋R）. Additionally, a pyrite-derived inhibitory effect on the rearrangment of C29 steranes must be taken into account, but not on triterpanes reaction. Non- appearance of statistically important correlations, be

关键词： brown coal diagenetic transformations of saturated biomarkers diagenetic transformations of saturated biomarkers steranes diterpanes and triterpanes principal component

GEOCHEMISTY OF BICYCLIC ALKANES IN SEDIMENTS, COAL AND CRUDE OILS

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 1991年第3期34卷 363-376页

作者：罗斌杰王有孝孟迁祥杨醒华李新宇陈宁 Lanzhou Institute of Geology Academia Sinica

By using GC-MS to analyze the extracts of source rocks, coal and crude oil samplesformed in different sedimentary environments in China, New Zealand and Australia, twenty-two compounds of five types of bicyclic alkanes have been dis covered in the samples. Thispaper makes an exposition of stereochemical structure, abundance and distributive features ofthese compounds and their relation to sedimentary environments and thermal evolution. Furt-thermore, it demonstrates how the abundance ratios of bicyclic alkanes to steranes and ter-panes, drimane to homodramane and the relative abundance of C15,C16,C12-C14 series of bicyclic-alkane compounds can be used to judge and determine types of oil and gas forming environ-ments （the depositive environments of source rocks from which the oil and gas wereformed）, characteristics of source rocks and degree of maturation.

关键词： bicyclic alkanes drimane homodrimane steranes hopanes crude oils sediments