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1.
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
2.
沉积物中NSO杂环芳烃的分布特征及其地球化学意义 总被引：9，自引：4，他引：9
对金湖凹陷原油和烃源岩中分子骨架结构相似，分别含N，S，O的三类杂环芳烃－吡咯类，硫芴和氧芴系列的分布特征及其应用进行了初步探讨,烃源岩中这三类杂原子化合物的丰度一般高于原油，其在油，岩中的丰度差异按含N，O和S化合物的顺序依次降低，指示三类化合物吸附性依次降低，原油和烃源岩中三类杂原子化合物丰度具有较好的正相关性，并与芴系列具有良好的多项式关系，暗示三类杂原子化合物在原生和（或）后生作用与干酪根降解方式上可能有某些相似性与相关性，在未熟一低熟阶段，随着成熟度的增加，三类化合物的丰度逐渐增加，指示成熟度对其有一定的控制作用，NSO化合物在油气运移，成熟度评价和指相等方面具有重要意义。 相似文献
3.
八面河油田原油中吡咯类化合物及与其具有类似骨架的杂原子芳烃－二苯并噻吩、二苯并呋喃等具有较为明显的运移分馏效应，指示八面河断裂构造带中北部断裂、构造较为发育地带为主要油气注入点，绝大部分油气自主要注入点沿地层上倾方向作侧向运移；广北斜坡带运移分馏效应不太明显，反映各油气单元间连通性较差及油源、油气运聚成藏过程较为复杂；滩海一带原油具有较强的运移分馏效应，指示原油具有非原地性。含氮化合物运移分馏效应反映，断层、不整合面为八面河油田油气运移的主要通道，牛庄、广利洼陷为八面河油田可能的油源区，反映绝大多数油气主要来自正常生油门窗内的成熟烃源岩。 相似文献
4.
八面河油田油气运聚、成藏模式探讨 总被引：11，自引：2，他引：11
八面河油田原油中吡咯类化合物及与其具有类似骨架的杂原子芳烃—二苯并噻吩、二苯并呋喃等具有较为明显的运移分馏效应 ,指示八面河断裂构造带中北部断裂、构造较为发育地带为主要油气注入点 ,绝大部分油气自主要注入点沿地层上倾方向作侧向运移 ;广北斜坡带运移分馏效应不太明显 ,反映各油气单元间连通性较差及油源、油气运聚成藏过程较为复杂 ;滩海一带原油具有较强的运移分馏效应 ,指示原油具有非原地性 .含氮化合物运移分馏效应反映 ,断层、不整合面为八面河油田油气运移的主要通道 ,牛庄、广利洼陷为八面河油田可能的油源区 ,反映绝大多数油气主要来自正常生油门窗内的成熟烃源岩 . 相似文献
5.
苏北盆地溱潼凹陷油气运聚模式 总被引：2，自引：0，他引：2
通过对苏北盆地溱潼凹陷不同构造带部分具代表性油藏原油的饱和烃、芳烃生物标志物和吡咯类含氮化合物分布特征的分析,结合油区构造研究和油源对比成果,讨论了研究区油气的运移方向与运聚模式。结果表明,研究区不同构造带原油中吡咯类含氮化合物分馏效应存在差别,处于断阶带南侧的成熟原油运移效应明显,来源于其西北侧的俞垛次凹始新统阜宁组二段烃源岩;断阶带北侧的原油运移分馏效应较差,推测其主要来源于北侧的储家楼次凹阜宁组二段烃源岩,以短距离侧向运移为主;内斜坡带原油主要来自于储家楼深凹阜宁组二段烃源岩,沿其构造带上倾方向自西南到东北方向,含氮化合物分馏效应明显;坡垒带与外斜坡带阜宁组三段原油成熟度偏低,吡咯类含氮化合物浓度较高,原油自东北向西南方向以短距离运移为主,主要来自于深凹的低熟烃源岩。不同构造带的油气成藏模式也不一致,断阶带为阶梯状断块油气聚集模式,内斜坡带与坡垒带主要分布受断层控制的断块—岩性油藏,外斜坡带为反向正断层垒块控油模式。 相似文献
6.
应用含氮化合物探讨新疆轮南油田油气运移 总被引：28，自引：2，他引：26
新疆轮南地区原油中含有丰富的吡咯类含氮化合物,不同层系或相同层系原油中吡咯类化合物总体分布型式相似,但绝对丰富与相对颁布差异明显,显示显著的油气运移分馏效应。分析结果表明,奥陶系原油与三叠系、侏罗系原油具不同成藏期次与油气运移方向,奥陶系、石炭系原油运移方向为自西而东,主要注入点在轮南、桑塔木断垒带的西南侧;三叠系、株罗系原油主要通过断层运移、聚集成藏,在后期构造演化过程中发生侧向分配调整。吡咯类 相似文献
7.
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
8.
南堡凹陷油气源尚不清晰.首次采用单体烃碳同位素、结合生物标志物对全凹陷范围的原油和烃源岩进行了精细地球化学研究.分析表明, 拾场次洼沙三段烃源岩(Ⅰ类)发育高丰度的4-甲基甾烷与硫芴系列、贫伽玛蜡烷, 单体烃碳同位素为"斜直线型", 相关原油分布于高柳深层; 南堡凹陷南部沙二+三段源岩(Ⅱ类)伽玛蜡烷较发育, 但4-甲基甾烷不太发育, 其他特征类似于Ⅰ类源岩, 相关原油发现于潜山; 南堡凹陷沙一段-东三段烃源岩(Ⅲ类)富含重排甾烷与孕甾烷系列, 单体烃碳同位素较轻且近"W"型, 相关原油主要分布于南堡4、5号构造带.发现南堡油田1、2号构造带、老爷庙、高柳中浅层原油具有界于Ⅱ、Ⅲ类源岩(及相关原油)间的同位素与生标特征, 系混源油, 定量预测出混源油中沙二+三段源岩的贡献最高达82%.本研究关于Es2+3系南堡凹陷重要的油气源的认识不同于以往研究, 为该区进一步油气勘探提供了重要依据. 相似文献
9.
原油芳烃中三芴系列化合物的环境指示作用 总被引：8，自引：1，他引：7
原油芳烃组分中的三芴(硫芴、氧芴和芴)系列化合物被认为源于同一母质,他们的含量变化常被认为是原始沉积环境的反映.通过对南阳凹陷、江汉盆地、准噶尔盆地和珠江口盆地等地区64个原油芳烃组分中三芴系列化合物的分析,发现利用新图版来区分原油母质形成的原始环境,比用简单的三角图效果好;用硫芴系列/氧芴系列与姥植比作图来判别环境也能取得用伽马蜡烷指数与姥植比同样效果. 相似文献
10.
东营凹陷北部陡坡带稠油成藏机理与油气运聚特征 总被引：6，自引：1，他引：5
东营凹陷北部陡坡带的王庄—宁海地区发现了大量稠油 ,但原油的成因及其成藏机理仍不甚了解 .在以往原油成因与油源调查基础上 ,利用非烃含氮化合物及包裹体均一化温度对该区进行油气运移方向与相对距离、成藏时间与期次的分析 .结果表明 ,东营凹陷北部带原油具有由南而北的运移分馏效应 ,反映北部陡坡带原油来自南部的利津洼陷 ;王庄—宁海地区原油总体具有由东而西的运移分馏效应 ,其东、西两侧各有一主要油气注气点 .王庄—宁海原油烃类与非烃组成与分布特征揭示该区油气具有混合聚集特征 .包裹体测试反映王庄—宁海地区油藏主要为晚期成藏 ,距今小于 5Ma ;而靠近生油中心地带包裹体具有早期成藏的记录 (± 36Ma) . 相似文献
11.
E. M. Prasolov S. A. Sergeev B. V. Belyatsky E. S. Bogomolov K. A. Gruzdov I. N. Kapitonov R. Sh. Krymsky V. O. Khalenev 《Geochemistry International》2018,56(1):46-64
This paper reports the first results of a study of 11 isotope systems (3He/4He, 40Ar/36Ar, 34S/32S, 65Cu/63Cu, 62Ni/60Ni, 87Sr/86Sr, 143Nd/144Nd, 206–208Pb/204Pb, Hf–Nd, U–Pb, and Re–Os) in the rocks and ores of the Cu–Ni–PGE deposits of the Norilsk ore district. Almost all the results were obtained at the Center of Isotopic Research of the Karpinskii All-Russia Research Institute of Geology. The use of a number of independent genetic isotopic signatures and comprehensive isotopic knowledge provided a methodic basis for the interpretation of approximately 5000 isotopic analyses of various elements. The presence of materials from two sources, crust and mantle, was detected in the composition of the rocks and ores. The contribution of the crustal source is especially significant in the paleofluids (gas–liquid microinclusions) of the ore-forming medium. Crustal solutions were probably a transport medium during ore formation. Air argon is dominant in the ores, which indicates a connection between the paleofluids and the atmosphere. This suggests intense groundwater circulation during the crystallization of ore minerals. The age of the rocks and ores of the Norilsk deposits was determined. The stage of orebody formation is restricted to a narrow age interval of 250 ± 10 Ma. An isotopic criterion was proposed for the ore-bearing potential of mafic intrusions in the Norilsk–Taimyr region. It includes several interrelated isotopic ratios of various elements: He, Ar, S, and others. 相似文献
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奥地利安东帕有限公司 《岩矿测试》2009,28(3):306-306
最新的流行病学研究表明,空气中较高浓度的悬浮细颗粒可能对人类的健康有不利的影响。根据该项研究显示,由于心脏病、慢性呼吸问题和肺功能指标恶化而导致死亡率的升高与细尘粒子有关。这些研究结果已经促使欧盟于1999年4月出台了限制空气中二氧化硫、二氧化氮、氧化氮、铅和颗粒物含量的法案(1999/30/EC),对各项指标包括对可吸入PM10颗粒的浓度提出了新的限制性指标。PM10颗粒是指可以通过预分级器分离采集的气体动力学直径小于10μm的细颗粒。目前研究的兴趣重点逐步偏向PM2.5这些更细微颗粒物,PM2.5这种颗粒物对健康有明显的不利影响。在欧盟指令2008/50/EC中,对PM10和PM2.5都提 相似文献
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S. Viswanathan K. Surya Prakash Rao B. Mahabaleswar 《Journal of the Geological Society of India》2013,82(6):621-627
Komatiites are mantle-derived ultramafic volcanic rocks. Komatiites have been discovered in several States of India, notably in Karnataka. Studies on the distribution of trace-elements in the komatiites of India are very few. This paper proposes a simple, accurate, precise, rapid, and non-destructive wavelength-dispersive x-ray fluorescence (WDXRF) spectrometric technique for determining Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th in komatiites, and discusses the accuracy, precision, limits of detection, x-ray spectral-line interferences, inter-element effects, speed, advantages, and limitations of the technique. The accuracy of the technique is excellent (within 3%) for Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Zr, Nb, Ba, Pb, and Th and very good (within 4%) for Y. The precision is also excellent (within 3%) for Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th. The limits of detection are: 1 ppm for Sc and V; 2 ppm for Cr, Co, and Ni; 3 ppm for Cu, Zn, Rb, and Sr; 4 ppm for Y and Zr; 6 ppm for Nb; 10 ppm for Ba; 13 ppm for Pb; and 14 ppm for Th. The time taken for determining Sc, V, Cr, Co, Ni, Cu, Zn, Rb, Sr, Y, Zr, Nb, Ba, Pb, and Th in a batch of 24 samples of komatiites, for a replication of four analyses per sample, by one operator, using a manual WDXRF spectrometer, is only 60 hours. 相似文献
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《Applied Geochemistry》2001,16(2):137-159
Five hundred and ninety-eight samples of terrestrial moss (Hylocomium splendens and Pleurozium schreberi) collected from a 188,000 km2 area of the central Barents region (NE Norway, N Finland, NW Russia) were analysed by ICP-AES and ICP-MS. Analytical results for Al, B, Ba, Ca, K, La, Mg, Mn, Na, P, Rb, Si, Sr, Th, U and Y concentrations are reported here. Graphical methods of data analysis, such as geochemical maps, cumulative frequency diagrams, boxplots and scatterplots, are used to interpret the origin of the patterns for these elements. None of the elements reported here are emitted in significant amounts from the smelting industry on the Kola Peninsula. Despite the conventional view that moss chemistry reflects atmospheric element input, the nature of the underlying mineral substrate (regolith or bedrock) is found to have a considerable influence on moss composition for several elements. This influence of the chemistry of the mineral substrate can take place in a variety of ways. (1) It can be completely natural, reflecting the ability of higher plants to take up elements from deep soil horizons and shed them with litterfall onto the surface. (2) It can result from naturally increased soil dust input where vegetation is scarce due to harsh climatic conditions for instance. Alternatively, substrate influence can be enhanced by human activity, such as open-cast mining, creation of ‘technogenic deserts’, or handling, transport and storage of ore and ore products, all of which magnify the natural elemental flux from bedrock to ground vegetation. Seaspray is another natural process affecting moss composition in the area (Mg, Na), and this is most visible in the Norwegian part of the study area. Presence or absence of some plant species, e.g., lichens, seems to influence moss chemistry. This is shown by the low concentrations of B or K in moss on the Finnish and Norwegian side of the (fenced) border with Russia, contrasting with high concentrations on the other side (intensive reindeer husbandry west of the border has selectively depleted the lichen population). 相似文献
15.
S. M. Moosavirad J. Rasouli M. R. Janardhana M. R. Moghadam M. Shankara 《Arabian Journal of Geosciences》2013,6(10):3623-3634
This paper discusses the result of the detailed investigations carried out on the coal characteristics, including coal petrography and its geochemistry of the Pabedana region. A total of 16 samples were collected from four coal seams d2, d4, d5, and d6 of the Pabedana underground mine which is located in the central part of the Central-East Iranian Microcontinent. These samples were reduced to four samples through composite sampling of each seam and were analyzed for their petrographic, mineralogical, and geochemical compositions. Proximate analysis data of the Pabedana coals indicate no major variations in the moisture, ash, volatile matter, and fixed carbon contents in the coals of different seams. Based on sulfur content, the Pabedana coals may be classified as low-sulfur coals. The low-sulfur contents in the Pabedana coal and relatively low proportion of pyritic sulfur suggest a possible fresh water environment during the deposition of the peat of the Pabedana coal. X-ray diffraction and petrographic analyses indicate the presence of pyrite in coal samples. The Pabedana coals have been classified as a high volatile, bituminous coal in accordance with the vitrinite reflectance values (58.75–74.32 %) and other rank parameters (carbon, calorific value, and volatile matter content). The maceral analysis and reflectance study suggest that the coals in all the four seams are of good quality with low maceral matter association. Mineralogical investigations indicate that the inorganic fraction in the Pabedana coal samples is dominated by carbonates; thus, constituting the major inorganic fraction of the coal samples. Illite, kaolinite, muscovite, quartz, feldspar, apatite, and hematite occur as minor or trace phases. The variation in major elements content is relatively narrow between different coal seams. Elements Sc,, Zr, Ga, Ge, La, As, W, Ce, Sb, Nb, Th, Pb, Se, Tl, Bi, Hg, Re, Li, Zn, Mo, and Ba show varying negative correlation with ash yield. These elements possibly have an organic affinity and may be present as primary biological concentrations either with tissues in living condition and/or through sorption and formation of organometallic compounds. 相似文献
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Mercury,arsenic, antimony,and selenium contents of sediment from the Kuskokwim River,Bethel, Alaska,USA 总被引：1，自引：0，他引：1
The Kuskokwim River at Bethel, Alaska, drains a major mercury-antimony metallogenic province in its upper reaches and tributaries. Bethel (population 4000) is situated on the Kuskokwim floodplain and also draws its water supply from wells located in river-deposited sediment. A boring through overbank and floodplain sediment has provided material to establish a baseline datum for sediment-hosted heavy metals. Mercury (total), arsenic, antimony, and selenium contents were determined; aluminum was also determined and used as normalizing factor. The contents of the heavy metals were relatively constant with depth and do not reflect any potential enrichment from upstream contaminant sources. 相似文献
20.
《Chemical Geology》2007,236(1-2):13-26
We examined the coprecipitation behavior of Ti, Mo, Sn and Sb in Ca–Al–Mg fluorides under two different fluoride forming conditions: at < 70 °C in an ultrasonic bath (denoted as the ultrasonic method) and at 245 °C using a Teflon bomb (denoted as the bomb method). In the ultrasonic method, small amounts of Ti, Mo and Sn coprecipitation were observed with 100% Ca and 100% Mg fluorides. No coprecipitation of Ti, Mo, Sn and Sb in Ca–Al–Mg fluorides occurred when the sample was decomposed by the bomb method except for 100% Ca fluoride. Based on our coprecipitation observations, we have developed a simultaneous determination method for B, Ti, Zr, Nb, Mo, Sn, Sb, Hf and Ta by Q-pole type ICP-MS (ICP-QMS) and sector field type ICP-MS (ICP-SFMS). 9–50 mg of samples with Zr–Mo–Sn–Sb–Hf spikes were decomposed by HF using the bomb method and the ultrasonic method with B spike. The sample was then evaporated and re-dissolved into 0.5 mol l− 1 HF, followed by the removal of fluorides by centrifuging. B, Zr, Mo, Sn, Sb and Hf were measured by ID method. Nb and Ta were measured by the ID-internal standardization method, based on Nb/Mo and Ta/Mo ratios using ICP-QMS, for which pseudo-FI was developed and applied. When 100% recovery yields of Zr and Hf are expected, Nb/Zr and Ta/Hf ratios may also be used. Ti was determined by the ID-internal standardization method, based on the Ti/Nb ratio from ICP-SFMS. Only 0.053 ml sample solution was required for measurement of all 9 elements. Dilution factors of ≤ 340 were aspirated without matrix effects. To demonstrate the applicability of our method, 4 carbonaceous chondrites (Ivuna, Orgueil, Cold Bokkeveld and Allende) as well as GSJ and USGS silicate reference materials of basalts, andesites and peridotites were analyzed. Our analytical results are consistent with previous studies, and the mean reproducibility of each element is 1.0–4.6% for basalts and andesites, and 6.7–11% for peridotites except for TiO2. 相似文献