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1.
应用非烃技术、多馏分绝对定量技术,在分析苏北金湖凹陷原油、烃源岩地球化学特征、油源对比的基础上,重点对吡咯类含氮化合物在岩一油、油一油运移中的分馏效应进行了研究,并对骨架相似的另两类杂原子化合物一氧芴(二苯并呋喃)、硫芴(二苯并噻吩)的运移分馏效应作了初步探讨.结果表明,金湖凹陷西斜坡原油中吡咯类化合物具有较好的运移分馏效应,油气主体运移方向为东北至西南,相邻的三河次凹为其主要的油源区;杂原子化合物一氧芴、硫芴系列运移分馏效应不及吡咯类;绝对定量技术可弥补常规生物标志物在油气二次运移过程中异构体间分馏效应难以观察的不足,可作为继非烃技术后的另一评价油气运移过程的重要工具.  相似文献   

2.
金湖凹陷西斜坡油气运移分子地球化学研究   总被引:13,自引:0,他引:13  
应用非烃技术、多馏分绝对定量技术,在分析苏北金湖凹陷原油、烃源岩地球化学特征、油源对比的基础上,重点对吡咯类含氮化合物在岩-油、油-油运移中的分馏效应进行了研究,并对骨架相似的另两类杂原子化合物-氧芴 (二苯并呋喃 )、硫芴 (二苯并噻吩 )的运移分馏效应作了初步探讨。结果表明,金湖凹陷西斜坡原油中吡咯类化合物具有较好的运移分馏效应,油气主体运移方向为东北至西南,相邻的三河次凹为其主要的油源区;杂原子化合物-氧芴、硫芴系列运移分馏效应不及吡咯类;绝对定量技术可弥补常规生物标志物在油气二次运移过程中异构体间分馏效应难以观察的不足,可作为继非烃技术后的另一评价油气运移过程的重要工具。  相似文献   

3.
借助于定量GC—MS分析技术,系统分析了一组取自辽河油田生物降解程度不同的原油芳烃馏分中三芴系列的组成特征。结果表明在生物降解过程中三芴系列化合物很容易遭受生物降解。母体三芴化合物在原油轻微降解阶段抗降解能力相似,其相对组成保持基本稳定,仍可指示沉积环境的性质;但进入中等及以上程度降解作用后,抗生物降解能力出现差异,相对组成发生变异,失去其环境意义。在甲基三芴系列中,甲基硫芴的抗降解能力强于甲基芴和甲基氧芴,降解速率不一致,组成特征不断变化,使甲基三芴系列相对组成不能指示沉积环境的性质。“三芴系列”被细菌消耗的速率不同,整个生物降解过程中其相对组成都在发生变化,因此对生物降解原油而言,无论其降解程度如何,“三芴系列”相对组成特征均不能有效的指示沉积环境的性质。  相似文献   

4.
对江汉盆地西南缘12个原油样品中含硫化合物分布特征的研究表明,原油中二苯并噻吩系列化合物和苯并萘并噻吩系列化合物分别占芳烃总量的4.61%~9.79%和0.27%~1.32%,与烃源岩中含硫化合物的含量一致,反映原油中含硫化合物的含量与沉积环境有关.原油含硫化合物的内组成表明,咸水环境有利于二甲基二苯并噻吩和三甲基二苯并噻吩系列化合物的相对富集.4-甲基二苯并噻吩/1-甲基二苯并噻吩峰面积比值(MDR)在低成熟阶段(Ro<0.7%)的变化范围较小,当成熟度进一步增加时,因热稳定性较差的1-甲基二苯并噻吩向其他化合物转化的速度加快,相对丰度降低,而4-甲基二苯并噻吩的相对丰度增加,致使MDR值随成熟度的增加而很快增大.同时,DR值受到沉积条件的影响,可能指示沉积环境的咸水化程度.2 3-甲基二苯并噻吩/二苯并噻吩峰面积比值与4-甲基二苯并噻吩/二苯并噻吩峰面积比值之间表现为正相关,说明2 3-甲基二苯并噻吩与4-甲基二苯并噻吩的形成机理相似,同样受沉积环境和成熟度的影响.  相似文献   

5.
应光国  范璞 《沉积学报》1992,10(2):126-134
本文用GC-MS技术分析了美国南佛罗里达盆地Sunnliand原油和油源岩抽提物中的芳烃,以便探讨碳酸盐岩环境中芳烃的分布特征,并用来重建古环境.Sunnliand原油和油源岩中含较半富的萘、菲、二苯并噻吩和三芳甾烷等化合物,甲基二苯并噻吩异构体呈V型分布.芴、氧芴和硫芴三系列化合物的相对含量以及其他地球化学特征如:Pr/Ph<1、正烷烃在C22-C30范围内呈偶碳优势、无或很少有二环倍半萜、含丰富的含硫芳烃等,指示Sunnliand原油和油源岩形成于海相强还原高盐环境.Sunnliand原油和油源岩中检出的一些化合物如:D环芳构化8,14-断藿烷、长链烷基苯、长链烷基苯并噻吩以及很高的延伸藿烷(C31-C35)和C24、C26四环萜烷表明Sunniland有机质有细菌输入.成熟度参数指示Sunniland原油和油源岩属未成熟至低成熟.  相似文献   

6.
通过色谱-质谱分析,对海拉尔盆地贝尔凹陷35个原油样品进行聚类分析,将之分成4类.Ⅰ类原油是贝尔凹陷原油主体,占分析样品的77%,特点足菲系列含量高,平均值为64.7%,三芳甾类化合物和三芴类化合物含量次之,分别为11.42%和11.81%.Ⅱ类原油为高三芳甾类原油,三芳甾类化合物占芳烃化合物的53.9%,是该类原油的主要成份,非系列化合物含量较低,为32.5%,萘系列含量和三芴化合物含量最低,分别为0.6%和3.54%.Ⅲ类原油为高菲系列和高萤蒽含量原油,菲系列为64%,萤蒽含量高达11%,是其它原油的16倍以上.Ⅳ类原油具有高萘、高三芴化合物和低菲系列化合物的特点,分别占原油芳烃馏分的30%、32%和26%,三芳甾类化合物含量低,占3.6%.这充分说明海拉尔箍地烃源岩沉积期间有不同的沉积环境,原油有不同的牛烃母质.Ⅱ类原油以藻类为主要生烃母质,Ⅲ类原油以高等植物为主,Ⅰ类原油介于Ⅱ类和Ⅲ类原油之间,为混合型生烃母质.Ⅳ原油沉积环境和前三类原油明显不同,为咸水强还原湖相沉积环境.  相似文献   

7.
低熟油、烃源岩中含氮化合物分布规律及其地球化学意义   总被引:18,自引:3,他引:18  
对八面河地区原油、油砂以及不同成熟度和岩性有异的烃源岩中吡咯类化俣物的分布特征及其潜在的地球化学意义进行了探讨。结果表明,随着成熟度的增加,八面河地区烃源岩中吡咯类化合物中屏蔽化程度高的异构体比屏蔽化程度低的异构体富集,咔唑及苯并咔唑系列中低相对分子质量的同系物比高相对分子质量的同系物富集,苯并[a]咔唑比苯并[c]咔唑富集。八面河地区原油中吡咯类化合物有较为明显的运移分馏效应,观察到高、低相对分子质量的同系物间的运移分馏效应比不同类型异构体间的分馏效应更为显著,而前者受成熟度的影响可能相对小于后者;发现吡咯类化合物的油气运移分馏效应不仅体现于不同氮官能团屏蔽、半屏蔽和暴露三类异构体间,同样体现于同一类型的同分导师构体之间,指示此类化合物有较强的活性。吡咯类化俣物与烃类化合物一样具有多方面潜在的地球化学意义。  相似文献   

8.
二连盆地侏罗系烃源岩研究程度较低,但在侏罗系发现有工业油流.本文通过有机岩石学与有机地球化学常规分析,系统研究与评价了此套烃源岩;结合原油与烃源岩的生物标志化合物的对比与分析,探讨其对油源的贡献.结果表明,二连盆地上侏罗统烃源岩有机质丰度低,有机质类型以Ⅲ型为主,成熟度较低,为非或差烃源岩;中下侏罗统有机质丰度较高,有机质类型以Ⅱ2-Ⅲ型为主,成熟度较高,为较好—好烃源岩.侏罗系烃源岩形成于淡水的氧化沉积环境,以陆源高等植物输入为主.此外,阿56井阿尔善组部分原油和图参1井侏罗系原油来源于侏罗系烃源岩.由此推断二连盆地侏罗系烃源岩具有良好的生烃潜力,勘探前景广阔.  相似文献   

9.
曹洁  魏仙样  严小鳙  李玉宏  魏建设 《地质通报》2012,31(10):1639-1644
根据对祥探8井华力西末期风化壳原油地球化学特征的分析,原油具有饱和烃含量高,芳烃、非烃、沥青质含量低和全油C同位素轻的特点,生物标志化合物藿烷系列具有C30藿烷含量高,伽马蜡烷含量相对较高等特点,指示生烃母质类型好,沉积环境为高含盐的还原环境,烃源岩演化程度较高。与祥探9井烃源岩生物标志化合物特征一致,指示与石炭系烃源岩具有良好的亲缘关系。  相似文献   

10.
东濮凹陷盐湖相原油中杂原子化合物研究薄弱。采用高分辨率质谱技术、结合色谱-质谱,对东濮凹陷盐湖相、淡水湖相原油、烃源岩中的含氮、氧化合物进行了检测。结果表明,原油中含有丰富的氮、氧化合物, N1、O1和O2占绝对优势;随成熟度增加,N1和O1类化合物相对丰度增加、O2类化合物相对丰度降低、氮/氧化合物的缩合度增加、烷基侧链碳数范围降低,提出了多项氮、氧化合物的成熟度辅助识别指标,建立了DBE15/DBE9-N1和DBE15+/DBE14--N1与折算镜质体反射率之间的定量关系式。通过对氮、氧化合物的油-油、油-岩对比,认为东濮凹陷盐湖相原油主要来自成熟烃源岩。基于高分辨率质谱的氮、氧化合物具有重要的成熟度评价、油源对比、油气运移示踪的应用前景。  相似文献   

11.
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.  相似文献   

12.
Robert L. Linnen   《Lithos》2005,80(1-4):267-280
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.  相似文献   

13.
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.  相似文献   

14.
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).  相似文献   

15.
正The Kuqa depression deposited thick rock salt,which has a lower density than surrounding rocks.When salt bodies form a certain scale,obvious negative gravity anomalies can be detected in the surface.Therefore,gravitational method can quickly obtain the shape,plane distribution of deep-seated salt bodies and overall tectonic morphology of the basin.  相似文献   

16.
正1 Introduction The Pingluoba brine,which characterized as high concentration with sodium,potassium,boron,lithium,and rubidium,possess great development value.The main composition of the brine can be summarized to the  相似文献   

17.
正1 Introduction In the present paper,MgCl2·6H2O,FeCl3·6H2O,and CeCl3·6H2O were used as raw materials in the precipitationhydrothermal method to synthesize MgF eC e hydrotalcite.The effects of the Fe:Ce molar ratio on the composition,crystal structure,and thermal stability of hydrotalcite are examined.Energy-dispersive X-ray spectroscopy(EDS),X-  相似文献   

18.
正1 Introduction Crystallization is one of important unit operations in the chemical production process,which requires not only the crystal product with high purity and yield,but also the available particle size of the crystal products to ensure product quality.Crystallization process is affected by  相似文献   

19.
正Dear Authors and Readers:First of all,on behalf of the new Editorial Board,I would like to express our sincere appreciation for your continuing support of our journal.This journal,founded in 1922,is the oldest geological journal in China.As the flagship journal of the Geological Society of China,it has become more and more influential in earth sciences in China and beyond.The journal is now indexed by SCI,CA and more than 20 other databases,with an impact  相似文献   

20.
正20141283 Bai Daoyuan(Hunan Institute of Geological Survey,Changsha 410016,China);Zhong Xiang Nature,Origin and Tectonic Setting of Jinzhou Basin in the South Segment of Xuefeng Orogen(Geology in China,ISSN1000-3657,CN11-1167/P,40(4),2013,p.1079-1091,10 illus.,47 refs.)Key words:foreland basins,strike-slip faults,Hunan Province  相似文献   

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