综合烃类检测技术及其在早期油藏描述中的应用

烃类检测是早期油藏描述的重要任务之一,根据对我国东部几个含油气构造实际资料研究,提出了如下三种方法:1.应用亮点原理确定烃类的地震模式及其在纵向上的分布特征;2.应用AVO技术,进一步确定地震储层和垂向分布特征以及划分油气边界;3.在以上研究基础上,我们提出了一种利用多种地震参数进行烃类综合检测的方法及实现过程。文中给出了一些实例来说明方法的使用效果。在不断的完善和充实之后,这些方法会在油气勘探过程中得到广泛的应用。     

浅谈R—tree（R—树）技术及其在断层数据管理上的应用

为了有效地管理三维空间的地球物理数据、地质数据以及计算机辅助设计数据,数据库系统需要一个索引结构,这个索引结构有助于根据三维空间体的空间位置快速存取数据。但是传统的索引方法不适于多维空间的数据体存取。本文将讨论一种称作中文R—树的动态索引结构,该索引结构将满足多维空间数据管理的需要。并讨论R-tree的检索、增加及删除算法,以及R-tree技术应用于断层数据管理的方法和体会。     

地电阻率的相干加强分析

本文介绍了相干加强的原理及其在地电阻率分析预报地震中的应用研究，计算了大柏舍台和宝坻台ρ＿ｓ连续几年的资料，结果发现地震前ρ＿ｓ有较为突出的短临异常．     

华北地区地下介质波速比值(VP/VS)研究

文中利用分别独立反演得到的华北地区 16个台的S波和P波速度结构 ,计算了各台站下方分层速度结构各层的波速比值 ,发现在强震区的波速比总体上高于弱震区 ,且地壳中的一些低速层位会出现 >1 8的波速比值 ,而在弱震区或稳定块体内部 ,各层波速比一般都低于正常波速比 1 732 ,平均值甚至 <1 7;在过渡区域 ,如位于盆地边缘或稳定块体边缘的台站 ,其波速比值有高有低 ,一般情况下 >1 732。在此基础上 ,最后我们对位于不同地质构造体的台站下方的介质性质进行了讨论     

川东北飞仙关组鲕滩天然气地球化学特征与成因

四川盆地东北部下三叠统飞仙关组鲕滩气藏天然气烃类气体以甲烷为主,含量主要分布在75%～90%之间,C2 含量很少,为0%～0.15%,干燥系数为0.997 0～0.999 8,是典型的干气;非烃气体以H2S和CO2为主,含量分别为4.21%～16.24%和0.97%～10.41%.天然气δ13C1值为-29.0‰～-31.5‰,δ13C2值为-29.4‰～-32.4‰.多参数表明鲕滩气藏天然气是以腐泥型为主的高过成熟天然气.高含H2S的天然气分布区域与含石膏地层分布基本一致,这些H2S为飞仙关组气藏附近的石膏经热化学硫酸盐还原作用(TSR)而生成,CO2是其主要的副产物.在TSR过程中,C2 重烃气体比甲烷更容易与硫酸盐发生反应,也就是C2 重烃气体的消耗速率大于甲烷,从而导致发生TSR反应的天然气C2 含量低、H2S和CO2含量高.天然气δ13C1值与甲烷含量之间具有很好的负相关关系,而与天然气酸性系数[H2S/(H2S CnH2n 2)]具有正相关关系.根据同位素动力学的分馏效应,随着TSR的进行,烃类分子中的12C损耗速率大于13C,残留下来的烃类分子中则更加富集13C,也就是TSR反应使天然气碳同位素变重.     

Modern Sedimentation of Phosphorus and Its Microbial Decomposition and Concentration: An Example from Dianchi Lake, Yunnan, China

Dianchi Lake is one of the lakes with the richest phosphorus source in the world, in which the P2O5 content in the bottom sediments reaches averagely 0.51 wt % and maximally 1.92%. Studies indicate that this: extremely P-rich state is attributed mainly to the large volume (as high as hundred thousands of tons) of phosphatic matter coming into the lake as many rivers feeding the lake pass through a vast area of phosphate-mining districts, which then undergo weathering and particularly some human activities, including waste water discharge. When phosphatic matter enters the lake, its grained parts are firstly decomposed by phosphorus-decomposing bacteria, and finally accumulated in some geographically special parts of the lake, such as a bay area where water flow is much more slower than elsewhere in the lake. With the involvement of phosphorus-concentrating bacteria, the accumulated phosphates in the bottom sludge ultimately form phosphate minerals through deep-burial diagenesis.     

On the Origin of One Basin-Multiple Mountain Couplings in the Mesozoic-Cenozoic Basin-Range Area in Eastern North China

The basin-range coupling relation is a leading subject of the modern geology. In geometry, relations of this type include couplings between stretched orogenic belt and down-faulted basin, compressional orogenic belt and foreland basin, strike-slip orogenic belt and strike-slip basin and so on. Fault chains are the key for these couplings and there are typical examples for all these cases. The North China down-faulted basin is coupled west with the Taihang uplift, east with the Jiao-Liao Mountains, north with the Yanshan orogenic belt and south with the Dabie orogenic belt, that is to say, the central down-faulted basin and the surrounding orogenic belts bear a coupling relation within a uniform dynamistic system. Study shows that the central down-faulted basin and the North China mantle sub-plume structure have a close relation during their formation. Owing to intensive mantle sub-plume uplifting, the bottom of the lithosphere suffered from resistance, which caused the lithosphere of the eastern North Ch     

论华蓥山地区天青石矿石的两种成因

本文分析了四川－重庆华蓥山地区天青石矿床的野外宏观特征和微观特征,对三种主要类型的天青石矿石：层状天青石矿石、巨晶天青石矿石和条带状天青石矿石中的暗色条带天青石和白色条带天青石进行了野外产状、结构构造特征、稀土元素含量特征、天青石包裹体成分和包裹体盐度的比较分析,结果表明,层状矿石和条带状矿石中的暗色条带天青石是沉积形成的,巨晶矿石和条带状矿石中的白色条带天青石属热卤水成因。     

A Quartz-Carbonate Gold Deposit in North Margin of Sino-Korean Archean Craton

1. IntroductionThe gold deposits in Archean greenstone belts are the most important gold resources in the world, and their wall rocks are low-grade metamorphic greenstones (greenschist facies or sub-greenschist facies metamorphism). The ore bodies always appear very large in scale. The Sino-Korean Archean craton was not so stable as in Canada, South Africa, Australia and Russia, and its Archean greenstone belts are much smaller and with high grade metamorphism, where the gold deposits are …     

城市地籍测量中GPS技术的应用研究

GPS新技术的出现,可以高精度地测定地物点的坐标。特别是应用RTK新技术,依据一定数量的基准控制点,便可以高精度并快速地测定界址点及地物点的坐标。本文尝试利用GPS技术在城市地籍测量方面的应用做一些探讨。