碳酸盐矿物的包裹有机质及其生油意义

Fluorescent slice observations have revealed a considerable amount of organic matter enclosed in carbonate minerals, most of it giving off yellow-brown fluorescence and being zonally distributed in calcite and dolomite. The amount of enclosed organic matter released from the enclosure when treated with HCl is two times higher than that of extractable organic mattes in the same rock sample. In comparison to the extractable organic matter, the enclosed organic matter is possessed of some compositional characters of its own. In terms of the distribution of biological markess, it is suggested that the enclosed organic matter may be low in maturity relative to the extractable organic matter in the same source rock.Results of the simulating experiments under high temperatures and pressures show that this kind of organic matter enclosed in carbonate minerals can be converted into oil-generating substances. Therefore, detailed studies of the enclosed organic matter are of much help to the evaluation of oil-generating potentiality of carbonate source rocks.     

澳大利亚第四届有机地球化学会议

1986年8月18日至31日—我们随同以叶连俊先生为团长的中国科学院代表团赴澳大利亚出席十二届国际沉积学大会,并应邀参船了澳大利亚第四届有机地球化学会议。这次有机地球化学会议是澳大利亚的专业性例会,由矿物资源局T·G·Powell博士主持,会议历时两天,宣读论文二十多篇。我们根据这些论文及在参观中所了解的情况,对澳大利亚在石油地球化学方面的研究状况作一概要的介绍。     

A Novel Type of Oil—generating Organic Matter —Crystal—enclosed Organic Matter

The comparative study of organic matter in carbonate rocks and argillaceous rocks from the same horizon indicates that the organic thermal maturities of carbonate rocks are much lower than those of argillaceous rocks .Ana extensive analysis of extracted and inclused organic matter from the same sample shows that inclused organic matter is different from extracted organic matter,and the thermal maturity of the former is usually lower than that of the latter in terms of biomarker structural parameters.It seems that carbonate mineras could preserve organic matter and retard organic maturation.The inclused organic matter,abundant in most carbonate rocks,will be released from minerals and transformed into oil and gas during the high-thermal maturity stage.     

新疆某地区古地温地质模式与生油期推断

两年前,新疆石油勘探部门在BZ隆起地区约5000米深处钻出了原油。从地质上判断,本区的生油层可能是中、上石炭系。上述事实提出了一个问题,埋藏深度很大的古生界地层产出了原油,本区的古地温状况如何?     

古地温地质模式与油气评价

近十几年来,石油成因研究及勘探实践证明,在一般情况下,石油是在50—160℃的地温区间内由沉积岩中的有机质转化而成;地温过高的深部地层,只能产生天然气。因此,古地温的研究资料已成为寻找工业油气藏的重要依据。     

海州式磷矿的特点

在江苏新海連市、安徽宿松,在結晶片岩系中有規模很大的磷块岩矿床。湖北孝感、內蒙集宁丰鎭、东北鳳城及陝西蘭叶等地的片岩系中,也相繼发現了含磷层。在国外,苏联西们利亞的斯留殿斯卡、朝鮮的永柔、越南的老街(层位尚未完全肯定),也有类似的磷块岩矿床。     

塔里木盆地热历史

塔里木盆地热历史潘长春，周中毅，范善发，解启来（中国科学院广州地球化学研究所，广州５１０６４０）关键词古地温，热历史，塔里木盆地由于古地温是控制油气生成和演化的重要因素，十多年来塔里木盆地古地温和生烃史一直是倍受关注的课题。早期的研究认为该盆地古地温...     

塔里木盆地下古生界高成熟干酪根生烃潜力的评估

塔里木盆地下古生界海相高成熟生油岩干酪根仍具有一定的生烃潜力，其产烃率－温度－时间关系研究表明，在最近１－２Ｍａ内凹陷区奥陶系生油岩向邻近的隆起区提供了大量烃类。     

近500和1000大气压下现代海藻的热转变模拟实验

现已查明海藻是某些沉积岩,特别是某些碳酸盐岩的一种造岩生物。它是沉积岩中不溶有机质的主要来源之一,因而也是形成石油的一种重要油母质。 近年来,随着石油成因问题研究的深入,海藻的成分、结构及其在热转变过程中变化的研究日益被重视。R.C.小克拉克研究了现代海藻正烷烃的分布并指出:海洋中的海藻以C_(15)和C_(17)占绝对优势。R.P.费尔帕等分别通过氧化、还原、皂化及热裂解反应