金沙江向家坝Ⅶ坝址须家河组沉积环境分析

通过对金沙江向家坝水电站Ⅶ坝址地段上三叠统须家河组与地层岩石学特征、剖面结构、沉积构造和粒度分析的研究，指出它们分别属于游荡性河流沉积环境和交织河流沉积环境。     

丙南组的新认识

通过攀西地区丙南组露头及典型剖面研究 ,详细论述了丙南组的岩性组合特征及分段 ,首次提出丙南组在部分地区为海相沉积的新观点。丙南组的时代自曾繁礻乃先生 1945年于攀枝花丙南渡命名至今 ,皆因未发现化石而暂置晚三叠世。通过野外实地调查及相关资料研究 ,以古气候因素、与邻区早三叠世青天堡组对比 ,以及丙南组与上覆大荞地组的接触关系等多方面资料 ,提出丙南组的时代归属应为早三叠世。     

内蒙古扎鲁特旗林西组页岩沉积环境的地球化学表征

探讨内蒙古扎鲁特旗地区上二叠统林西组对应地质时期的沉积环境特点。在对该区及周缘的区域地质进行野外调查和资料调研的基础上,通过对页岩中生物标志化合物与微量元素的研究,饱和烃生物标志化合物和微量元素特征所揭示的相应地质信息展现出较好的一致性和互补性,认为林西组暗色富有机质泥页岩为陆壳贴合背景下的残余海盆沉积,展布应具有稳定性;该区具有成为泥页岩油气有利勘探区的潜力,但较高的有机母质成熟度可能为泥页岩油气勘探开发中的风险因素。     

直罗油田长2油层组沉积微相及油气富集因素

直罗油田长2油层组是延长组主力产层之一,结合鄂尔多斯盆地的构造及演化特征,研究直罗油田岩石类型、沉积构造、测井相及砂体展布特征,明确该区主要发育2条分流河道砂体,物源为北东-南西向;并探讨了长2油藏的油气富集规律。结果表明,研究区西北部、西南部水下分流河道砂体与鼻状构造的组合成为研究区的有利聚集区,该研究为类似地区储层沉积微相及油气富集规律的研究具有一定的借鉴意义。     

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.     

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.     

温州湾地区全新世沉积环境演变

通过对研究区内三个典型钻孔岩芯的沉积相识别标志的综合分析,并对比研究区内其它地方近百个钻孔岩性资料,确定了划分全新世和更新世的标志层,论述了温州湾地区全新世以来的沉积环境演变和气候变迁过程。     

平泉地区长城系岩相及沉积环境分析

通过沉积结构及构造研究.本文对平泉地区长城系进行了详细岩相分类.并对其沉积环境及演化进行了综合分析。     

准噶尔盆地南缘上二叠统芦草沟组和红雁池组层序地层学初析

通过详细的野外观测和部分实验研究，发现雅玛里克山剖面芦草沟组中的两条沉积岩脉；首次阐明两个组的微相和沉积模式，并证明这些湖成层序中存在年层和对应于百年、万年和数十万年量级的旋回。文中将芦草沟组和红雁池组划分为３０个层序，分析了沉积体系域的分布，并作出湖岸上超相对变化曲线，从而证明海相碎屑岩层序地层学沉积模型基本适用于大型陆相盆地，虽然差异是存在的。