Seismic Integrated Interpretation and Prediction on Channel Sandbody of Deep Layer at West Slope in Qikou Sag

According to the seismic and geological differences among every oil measures in mid-deep layers at west slope in Qikou Sag, varieties of new techniques on geophysics and geochemistry were introduced, such as seismic process of target and CWS, neural network seismic microfacies cluster analysis, 3D interval velocity analysis. Taking advantage of the series of new techniques aims at predicting synthetically and quantitatively the deep gravity flow channel sandbody. Furthermore, considering the structural setting data, potential structural-lithologic traps were specified. As a result, the geological and drilling effect is obviously promoted.     

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区间值直观模糊集的直积与相关性

在区间值直观模糊集上定义新的算子,给出这些关系与算子之间的一些重要性质,并讨论了区间值直观模糊集的相关性问题.     

Seismic Integrated Interpretation and Prediction on Channel Sandbody of Deep Layer at West Slope in Qikou Sag

1IntroductionIn modern oil and gas exploration, utilizing vari-eties of seismic information to comprehensively pre-dict oil and gas reservoir is always an important subject for geologists. Especially in recent years, with the constant development and innovation of seismic exploration technology, it has been one of important means of raising exploration efficiency to use seismic information relating to stratigraphic structure, lithological trap or reservoir to seek for isolated sandbody, channe…     

GIS分析中的地理模式

GIS的强大之处在于其分析功能,GIS分析是一个从地理数据中发现地理模式和要素间关系的过程.然而,对大多数用户而言,GIS分析显得难以入门,这一方面是由于GIS分析的困难性和复杂性,另一方面则由于相关的教育和培训机构对GIS分析的基础--地理模式的忽视.基于这个原因,介绍了地理模式的两种基本元素和主要的几种基本类型,并且论述了从地理数据中发现地理模式的过程.     

基于混沌理论的时间序列区间预测

运用非参数统计的方法，作出混沌时间序列在特定概率限的区间预测，弥补了传统点预测的不足，使预测的适用性得以提高。并通过数据实证验证了该理论方法。     

区间系统与区间优化模型——理论与应用

区间系统与区间优化模型是一种应用广泛的描述不确定性问题的数学模型.本文综述区间系统与区间优化模型在理论与应用方面的研究进展.特别地,本文将介绍区间线性系统的解和可解性问题、区间线性优化模型的最优解和最优性问题以及区间二次优化模型的最优解和最优性问题,最后简单概述它们的各种应用实例.     

Planktonic foraminiferal biostratigraphy and assemblage composition across the Cenomanian–Turonian boundary interval at Clot Chevalier (Vocontian Basin,SE France)

The Cenomanian–Turonian boundary interval is generally considered a critical time for planktonic foraminifera due to the environmental perturbations associated with Oceanic Anoxic Event 2. However, only the rotaliporids became extinct at the onset of the event, whilst several lineages evolved and/or diversified. This remarkable morphologic plasticity is often overlooked in the literature, partly because a number of stratigraphic sections have only been studied in thin-section due to the degree of lithification of the samples. Improved documentation of the morphological variability of planktonic foraminifera and better defined species concepts are required in order to improve biostratigraphy, particularly as Helvetoglobotruncana helvetica is an unreliable marker for the base of the Turonian. At the same time, detailed study of the planktonic foraminiferal response to OAE 2 demands a more profound knowledge of the assemblage composition.We present new biostratigraphic, taxonomic, and quantitative data for planktonic foraminiferal species from the Clot Chevalier section (Vocontian Basin, SE France), with the aim of (1) providing a detailed biostratigraphic analysis of the section, (2) documenting the morphological plasticity of specimens in this time interval and stabilizing species concepts, and (3) identifying promising markers to improve the resolution of the present biozonation and allow regional correlation. Samples were processed with acetic acid to extract isolated planktonic foraminifera. Assemblages were assigned to the upper Cenomanian Rotalipora cushmani Zone and to the uppermost Cenomanian–lowermost Turonian Whiteinella archaeocretacea Zone. Planktonic foraminiferal bioevents and assemblage composition identified at Clot Chevalier are compared with the well-studied Pont d'Issole section located ca. 15 km to the NE, highlighting similarities and differences in the species occurrences that may complicate the stratigraphic correlation between the two sections.The results of our study support the validity and common occurrence of species that have been misidentified and/or overlooked in the literature (i.e., Dicarinella roddai, Praeglobotruncana oraviensis, Marginotruncana caronae) and indicate that primitive marginotruncanids evolved before the onset of OAE 2, although species diversification occurred only after the event. Moreover, we believe that the first appearance of P. oraviensis might represent a promising bioevent for approximating the Cenomanian/Turonian boundary, after calibration with bio- and chemostratigraphically well-constrained sections. Finally, we describe three new trochospiral species, named “Pseudoclavihedbergella” chevaliensis, Praeglobotruncana pseudoalgeriana and Praeglobotruncana clotensis.     

LEO卫星轨道预报精度分析

利用动力学拟合法,以HY-2A卫星为例分析不同拟合区间对预报不同弧长的轨道精度的影响。基于CNES提供的事后精密星历和采用非差简化动力学方法获得的厘米级快速轨道两种产品,进行卫星轨道预报。结果表明:采用24 h和12 h拟合区间分别预报12 h轨道时,其3DRMS优于6 dm;当预报24 h轨道时,3DRMS优于1 m。     

完全规格化缔合勒让德函数及其导数的递推算法与适用范围比较

完全规格化缔合勒让德函数及其导数常用标准向前列递推算法和标准向前行递推算法进行计算。基于第一、第二相对数值精度标准对两种算法的适用范围进行分析比较,计算结果表明,标准向前列递推算法的适用范围大于标准向前行递推算法,说明前者优于后者;结果同时还表明,完全规格化缔合勒让德函数与其导数同一种算法的适用范围也相同,并指出了二者适用范围相同的原因。