银根-额济纳旗盆地查干凹陷毛11井烃源岩特征

为了进一步评价乌力吉构造带烃源岩情况,进而为查干凹陷的勘探提供钻井依据,我们对毛11井进行了评价。利用有机地球化学实验分析方法,从有机质丰度、类型、成熟度三个方面对毛11井烃源岩特征进行分析。分析结果显示,巴音戈壁组一段与二段有机质丰度较高,烃源岩有机质类型以Ⅱ2型为主,已进入成熟阶段,整体评价为较好烃源岩。     

渝东中寒武统至志留系烃源岩评价

根据烃源岩地化分析成果,应用所测岩样中有机碳TOC、岩石热解、族组分,氯仿沥青“A“以及镜质体反射率R。等分析,对渝东地区上中寒武统至志留系的泥岩、碳酸盐岩从有机质丰度、类型和成热度三个方面进行了烃源岩分析评价,建立了渝东中寒武统至志留系烃源岩评价标准,研究结果表明:渝东中寒武统至志留系主要烃源岩层有两层:有机质处于高成熟——过成熟演化阶段,以产天然气为主。     

惠民凹陷临南地区沙四段有机质丰度与类型研究

有机质丰度与类型是评价烃源岩生烃潜力的重要依据,其有机质含量高低与类型优劣直接关系到源岩是否具备形成工业性油气聚集的能力,本文对临南地区沙四段的有机质丰度及其类型进行分析研究。     

吐哈大河沿地区三叠系烃源岩特征分析

系统分析了吐哈盆地大河沿地区三叠系烃源岩分布特征、有机质丰度、有机质类型及成熟度等特征,深化了对该地区烃源岩潜力的认识。为了客观的评价该区的油气成藏条件,结合野外露头和地震相的研究结果,重新认识和评价已钻遇的烃源岩,并且对深部未钻烃源岩进行预测分析,初步认为大河沿地区具有较好的油气资源潜力。     

鄂尔多斯盆地甘泉地区古生界烃源岩特征研究

本文以区内主要探井延112井烃源岩分析化验资料为主,结合前人研究结果,对区内古生界烃源岩特征进行了综合分析研究。研究结果表明,鄂尔多斯盆地甘泉地区存在下古生界奥陶系碳酸盐岩烃源岩和上古生界石炭-二叠系煤系烃源岩两套烃源岩,但是两套烃源岩有机质丰度皆很低,按现行标准并不属于有效烃源岩。而试气等其它资料表明,上古生界煤系烃源岩确实是本区的主要气源岩。     

柴北缘东段中侏罗统烃源岩地球化学特征及评价

通过对柴北缘东段中侏罗统烃源岩有机质丰度、有机质类型以及成熟度有机地球化学特征研究表明,侏罗系烃源岩有机质丰度较高,综合评价为中等-好烃源岩,具有较大生烃潜力。其中半深湖相油页岩有机质类型为I-II型,生油潜力大;湖沼相煤系烃源岩有机质类型以III型为主,生气潜力大。中侏罗统烃源岩总体处于低熟-成熟热演化阶段,推测洼陷带深部(3500m以下)进入成熟阶段,已大量生烃。     

东伊犁盆地二叠系铁木里克组烃源岩特征研究

东伊犁盆地二叠系铁力木里克组烃源岩分布范围广,有机质丰度较高、有机质类型以Ⅲ型为主,部分Ⅱ_2型,有机质演化程度处于成熟-高成熟阶段,总体评价为较好烃源岩。综合研究认为二叠系铁木里克组烃源岩为盆地主要生油岩,伊宁凹陷为二叠系烃源岩的有利发育区。     

也门马里卜-夏布瓦盆地盐下烃源岩评价

盐下密穆组和莱穆组烃源岩是也门富含油气的马里卜-夏布瓦盆地的主要烃源岩。通过盐下密穆组和莱穆组烃源岩在该盆地的分布、有机质丰度、有机质类型和成熟度等方面的分析评价,认为该盆地盐下的密穆组和莱穆组烃源岩属于区域上优质烃源岩,具有厚度变化大,丰度高的特点,类型以混合型(Ⅱ)和腐泥型(Ⅰ)为主,并且已经成熟;油源对比进一步证实了盐下密穆组和莱穆组烃源岩为该盆地的优质烃源岩。     

准噶尔盆地西南缘白垩系烃源岩地球化学特征

通过对准噶尔盆地西南缘露头剖面和探井数据进行系统采样,运用有机地球化学分析方法,从有机质丰度、有机质类型和有机质成熟度三个方面对白垩系烃源岩进行系统的分析。结合准噶尔盆地西南缘的区域地质特征,对该区白垩系烃源岩进行综合评价。结果显示,准噶尔盆地西南缘白垩系烃源岩有机质丰度不高,但非均质性强,大部分地区发育较差的烃源岩,部分地区发育好的烃源岩。烃源岩有机质类型主要为II2型和III型,不同层段烃源岩样品的Ro分布在0. 52～0. 87,平均值为0. 73,处于低熟至成熟演化阶段。     

青海木里地区晚三叠世-早中侏罗世烃源岩特征初探

针对青海南祁连木里天然气水合物发现区分布的晚三叠世尕勒得寺组和早中侏罗世不同类型烃源岩的地质特征和烃源岩地化特征进行了初步分析。研究结果表明,晚三叠世尕勒得寺组烃源岩主要以暗色泥岩、碳质泥岩及煤为主;早中侏罗世窑街组烃源岩主要以暗色泥岩、页岩及煤为主。其中窑街组暗色泥岩、页岩具有较高的有机质丰度、生烃潜量,成熟度以低成熟-成熟为主,有机质类型主要为Ⅱ2、Ⅲ型,是好-较好的烃源岩,为该地区天然气水合物形成的最主要气源岩。     

长岭断陷深层烃源岩饱和烃生物标志化合物特征及其地球化学意义

长岭断陷是一个富气凹陷,天然气勘探取得较大突破,其深层发育了优质的烃源岩。对长岭断陷下白垩统沙河子组、营城组烃源岩饱和烃中正构烷烃、类异戊二烯烷烃、甾萜烷类化合物研究结果表明,深层烃源岩有机质热演化程度高,处于高-过成熟阶段,其母质来源比较复杂,既有低等水生生物又有陆源高等植物输入,泥岩形成于微咸水较强还原沉积环境。     

川东北地区上二叠统龙潭组烃源岩特征研究

本文以沉积学、石油地质学和油气地球化学等为基础,对川东北地区的上二叠龙潭组烃源岩进行了研究。通过分析,认为川东北龙潭组主要发育泥质烃源岩,这套优质烃源岩具有厚度大、有机质丰度高和演化程度高的特点。烃源岩干酪根的碳同位素显示烃源岩有机质为Ⅱ2、Ⅲ型,生烃史分析烃源岩主要生烃高峰期为晚侏罗世,时间较晚,对现今气藏贡献十分有利。     

Organic matter and sulphur distribution in phosphorites: Relevance to phosphate processing

Organic matter from North Carolina and Idaho phosphorites has been extracted and characterised using humic acid, kerogen and bitumen fractions. Extracts from thermally treated rock showed that the organic matter from the two source rocks responds quite differently to the heat treatment. With current commercial calcination of both North Carolina and Idaho phosphate rock at about 800°C, problems with acid-evolvable sulphide formation have arisen. From the findings made on the thermal behaviour of the organic matter and the associated sulphur redistribution, alternative processing strategies have been suggested for both North Carolina and Idaho phosphorites. Since these two rocks represent extremes in maturity for the contained organic matter, the results should be of relevance to other organic-rich unweathered and low-grade phosphorite or phosphatic shale deposits.     

Applications of electron microprobe analysis (EPMA) in the study of Venezuelan source rocks: La Luna and Querecual Formations

This work presents the electron probe for microanalysis (EPMA) study of Venezuelan source rocks for stylolites (Querecual Formation), framboids (La Luna Formation), and kerogen (La Luna and Querecual Formations). Distributions of major and trace elements were studied to determine the elemental association with inorganic (minerals) and organic phases (kerogen).In the Querecual Formation an association of S with Fe, Cu, Zn, and Ni was observed in the stylolites, suggesting the presence of authigenic sulfides, whereas V and Ni are associated with organic matter. In the La Luna Formation, massive and framboidal pyrite was observed, in some cases surrounded by sphalerite; also an association of S with Fe (pyrite) and Ni with Zn (in a lower proportion) was observed. This suggests that Ni and Zn coprecipitate with pyrite, but that Zn also forms a separate phase (sphalerite). In these samples Ni is associated both with the sulfide phase and the organic matter, but V is only associated with the latter. In kerogen from La Luna and Querecual Formation, elemental mapping shows that V is associated with kerogen; it also demonstrates the presence of inorganic phases by elemental associations among C, Ca, and Mg (carbonates); Al, Si, and K (aluminosilicates); and S, Fe, Co, Cu, Zn, and Ni (sulfides); these latter also seem to be associated with kerogen. This means that acidic attack on kerogen does not completely separate mineral phases, possibly because organic matter may be surrounding mineral phases, thus inhibiting this attack. These results demonstrate EPMA potential for studies on the distribution of major and trace elements in source rocks.     

松辽盆地滨北地区中浅层烃源岩特征分析及评价

滨北地区中浅层主要发育有冲积扇相、河流相、三角洲相和湖泊相等沉积相类型，并形成了大量分布的暗色泥岩。本文就滨北地区中浅层烃源岩进行了有机质丰度、类型和成熟度综合系统分析评价。结果表明本区烃源岩青一段、嫩一段和嫩二段较好，但成熟度较低，生烃能力有限。     

陕北斜坡东部上古生界山西组烃源岩评价

陕北斜坡东部上古生界山西组烃源岩有泥岩型和煤岩型两种。为了能够准确地评价研究区两种烃源岩的优劣,本次研究进行了较为全面的烃源岩样品选取和分析化验工作,并从有机质丰度、有机质类型和有机质成熟度三个方面对烃源岩进行综合研究。结果表明,山西组暗色泥岩样品总体已属于烃源岩范畴,其中烃源岩主要以中等一好级别为主,有机质类型为Ⅱ：型和Ⅲ型,处于高成熟一过成熟生气阶段;山西组煤系烃源岩为较差烃源岩,有机质类型为Ⅲ型,处于过成熟生气阶段。     

溶解性有机质对土壤中有机污染物迁移转化的影响因素

溶解性有机质(DOM)对土壤中有机物的迁移转化有重要作用,也受众多因素影响。介绍了DOM的基本概念、分类和环境作用;讨论了DOM的来源、DOM的分子量大小、DOM的浓度和p H值等影响因素对DOM与有机物的作用并分析了原因;提出了研究的走向。     

Problems with and local solutions for organic matter management in Vietnam

Soil organic matter plays a major role in sustainable agricultural development in Vietnam. A general soil evaluation shows that the content of organic matter in most soil units in Vietnam ranges between 0.5 to 3.0% soil organic matter (in the A and B horizon only) with lower levels especially on sloping land. Most upland soils (70% that contain ≤ 2% soil organic matter) are in danger due to imminent soil erosion. Soil organic matter is lost very quickly due to erosion, lack of organic manure and poor farming techniques in these areas. Using green hedgerows along contour lines and intercropping with legume species to cover the soil are technological options to control soil erosion and improve soil organic matter content on sloping land. Green hedgerows significantly reduce soil and organic matter loss by 50–70%, compared to sloping land without hedgerows. Intercropping with legume species reduces soil loss by 40–50%, and can provide the soil with 2.5–12 tons of green manure/ha/year. However, more studies are needed to identify the best technologies for managing soil organic matter in upland areas. This revised version was published online in June 2006 with corrections to the Cover Date.     

鄂尔多斯盆地中部地区长7烃源岩特征

鄂尔多斯盆地晚三叠世长7期发育了一套半深湖-深湖相优质油源岩,是该盆地最主要的烃源岩.运用有机地球化学和有机岩石学相结合的方法,对鄂尔多斯盆地中部地区长7烃源岩进行了较系统的研究.鄂尔多斯盆地中部地区长7烃源岩在研究区内广泛分布,厚度分布在3～85m之间,普遍分布在10～50 m间,整体上呈由研究区西南部向北、向东变薄的趋势;长7烃源岩有机质丰度较高,TOC值大部分超过1 0％,生烃潜力值大部分高于6.0 mg/g,氯仿沥青“A”值大部分高于0.1％,大部分属于“好”烃源岩级别;长7的烃源岩有机质类型主要为Ⅰ和Ⅱ1型,少量为Ⅱ2和Ⅲ型;长7的烃源岩镜质组反射率R.值在0.54％ ～ 0.92％之间,最高热解峰温Tmax值在411～456℃之间,多数已处成熟生油气阶段.     

油页岩的成矿机理研究

油页岩的沉积环境有很多种,而且组成各不相同。油页岩可按照组成（例如方解石等碳酸盐矿物质或石英、粘土等碎屑矿物质）或沉积环境（海相,湖相和陆相）进行分类。油页岩中的大多数有机质起源于藻类,少数起源于陆上维管植物的残骸。有机质的三种主要类型是结构藻类体、层状藻类体和沥青质体。某些油页岩也包括金属钒、锌、铜和铀等。大多数油页...