新场气田上沙溪庙组下部气藏沉积微相研究

以区域构造和陆相沉积为地质背景，利用层序地层学有关原理，对川西新场地区２０余口井的岩芯、测井和部分地震合成记录进行单井和联井的研究表明：该区上沙溪庙组下部砂岩沉积具完整的河流相沉积相序，自下而上为正韵律序列“二元结构”，河流砂体发育带是气藏的主产层，河流相点坝侧积体是油气富集的重要相带，不同的沉积微相是致密非均质性的宏观特征的反映。     

沉积盆地动力学与油气

首先简要介绍了沉积盆地动力学产生的背景及研究内容 ;然后重点论述了沉积盆地动力学对成盆、生烃、油气富集的影响及造山带与盆地间的耦合关系 ;最后介绍国际地学界沉积盆地研究动向 ,已由传统的构造沉积分析 ,逐步转向沉积盆地动力学研究     

北宿井田高岭岩矿床特征研究

对北宿井田内煤１８底板高岭岩矿床的赋存状态、岩性特征、矿物成分及化学组成进行了详细研究，并探讨了高岭岩的沉积环境及沉积规律。研究表明北宿井田高岭岩矿床分布稳定，质量较好，质量较好，具有重要的开采价值；其形成环境与成煤环境相近似，系泻湖、泥坪等弱水动力环境中由粘土质点及细粒陆源碎屑沉积而成，其母岩为酸性岩为酸性岩浆岩。     

沉积成因的煤层形态与厚度异常的研究

依据一定的划分标准对沉积成因的煤层形态与厚度异常进行了类型划分,定义了11种异常类型,讨论了它们的成因问题,结合大同矿务局四台和云岗矿实际揭露资料,对其中的某些异常类型给予了实例说明.     

Characteristics of hydrocarbon sources and controlling factors of their formation in Pingliang Formation, West Ordos Basin

According to organic geochemistry and organic petrology, the hydrocarbon sources in Pingliang Formation, W. Ordos basin, are systematically evaluated. The organic abundance of hydrocarbon source in this research is higher in the upper part of profiles than in the low, and more in mudstone than in carbonate. Most of organic matters become sapropelic, and few are humic-sapropelic in the regions of Shibangou and Zhuzisan. According to stable isotopes of carbon and oxygen in carbonate rock, boron index and ratios of elements, palaeo-salinity and sedimentary velocity are calculated. The two factors of paleao-salinity and sediment velocity, which control the distribution of organic matters, are discussed. Good relationship is found between water salinity and abundance of organic matter; in contrast, poor correlation is observed between salinity and types of organic matters. The relative sediment velocity in the research regions is also related with organic abundance and types. A low sediment velocity would lead to high abundance and good type of organic matters, and vice versa.     

新生代青藏高原三维古地形再造

印度板块与欧亚板块的碰撞,引发了青藏高原的快速隆升、高原及邻区的气候环境、地形地势巨变,这一过程为同期形成的海洋沉积盆地、周缘前陆盆地和高原内部盆地所记录。高原隆升剥蚀区与前述三种类型的汇水盆地基本上处于一个相对封闭和半封闭体系,因而,可以根据质量平衡的原则,将汇水盆地内的沉积物按照物源方向和一定的分配方案回剥至隆升剥蚀区,重建任一时间段内剥蚀区的地形地势。通过对比不同时间段的古地形地势演变,可以比较精确和全面地刻划高原的隆升过程、隆升和剥蚀速率、隆升后所达到的海拔高度,进而探讨隆升与气候的关系,探索青藏高原在大陆碰撞体制下是增生扩大还是缩小     

Discussion on marine source rocks thermal evolvement patterns in the Tarim Basin and Sichuan Basin, west China

Taking marine source rocks of lower Paleozoic in the Tarim Basin and Paleozoic ones in the Sichuan Basin as examples, their sedimentation process could be classified into four styles： continuous subsidence with deep sedimentation in early stage, continuous subsidence with deep sedimentation in later stage, that deeply buried-uplift-shallowly buried, and that shallowly buried-uplift-deeply buried. Unlike that in East China, the marine source rocks evolvement patterns did not accord with sedimentation styles one by one in superimposed basins in west China. Taking local geothermal field into account, four types of source rock evolvement patterns were built： that evolved fast in early stage, evolved fast in middle stage, evolved continuously and evolved in multistage. Among them, the 1st pattern contributed little to the present industrial oil pools directly, but paleo-oil reservoirs and gases cracked from crude oils were main exploration targets. Although some gases were found in the 2nd pattern, the scale was not big enough. For the 3rd and 4th patterns, the hydrocarbon potential depended on organic matters maturity in early stage. For relatively low mature rocks, it was possible to generate some oils in later stage; otherwise the main products were gases. Paleo-oil reservoirs remained fairly well in the Sichuan Basin, and most source rocks underwent kerogen-oil-gas processes, which was useful reference to gas exploration in the Tarim Basin.     

准噶尔盆地西北缘侏罗系储集物性的主要控制因素

准噶尔盆地西北缘侏罗系主要发育一套河流 -湖泊沉积体系 ,沉积相对储层物性的控制作用是第一性的 ,沉积相变可以导致储集物性由储层向非渗透层的突变 ,成岩作用对储集物性的改造作用也很明显 ,但仅能造成在同一沉积相带内储集物性的明显差异 ,同沉积相对储层物性的控制作用相比是第二性的。沉积相通过控制储集岩的颗粒粒度及泥质含量来控制储集物性 ,而成岩作用对储集物性的控制则表现为随储层埋藏深度不同 ,储层所遭受的成岩作用类型和强度均存在明显的差异 ,从而导致储集物性具有垂向分带的特征。通过在输入参数组合中增加受沉积相控制的岩性参数 ,可以在很大程度上改善测井反演孔隙度的精度。通过沉积相分布图和构造图 ,可以综合沉积和成岩两大地质控制因素进行储层物性平面分布的预测 ,这比单一地质因素预测方法具有更高的精度。     

分形与分维及在地球物理学中的应用

本文概述了分形几何的产生和发展,论述了分形与分维的基本概念,同时介绍了分形理论在地震科学、沉积岩结构及电导率、油田开发过程中的粘性指进等方面的应用。     

贵州二叠系锰矿沉积特征及成矿时代探讨

贵州二叠系锰矿主要以碳酸锰和氧化锰矿石为主,主要分布于遵义-黔西-纳雍-水城一带的台沟相内,对其形成时代一直以来都有争议.笔者通过对该区锰矿沉积特征及其与峨眉山玄武岩的接触关系等来探讨贵州二叠系锰矿成矿时代,认为贵州二叠系锰矿成矿时代属于中二叠世茅口晚期.