三维AVO解释技术在洪泽地区岩性油藏勘探中的应用

洪泽地区由于沉积的特点，储层横向变化快，油藏受构造、岩性、油源多因素控制。在对该区三维AVO属性体解释中，利用多元回归方法求取了横波曲线，分岩性和含油气性统计了纵、横波、泊松比参数分布规律，建立了本区的含油砂岩的正演模型，从而降低了AVO解释的多解性。通过井-震结合对四种AVO属性数据体进行了标定，并确定了各属性体应用范围，进而进行了储层和含油气检测。实践表明，该方法能有效地利用AVO属性数据体进行储层预测及油气检测，具有一定的推广价值。     

基于小波多尺度分析的奇性指数：一种新地震属性

传统的地震解释主要是观测地震振幅及相位的变化，但是地震振幅也会掩盖地下介质中真实的地质情况.在许多情况下，重要的地质信息可能是通过与振幅特征无关的奇异性参数来传递的.本文提出奇异性指数，即Hlder指数α（又被称为Lipschitz指数），可以作为一种新的地震属性，它能够准确反映数据中的奇点的位置和奇异性强度.Hlder指数α是对某一点上或某一点周围很小的范围内的奇异性强度的度量，大的α值表示低的奇异性（或高的正则性）.研究表明α可以作为一种自然的能够精确刻画地层边界的地震属性.本文根据这一思想，对合成和实测的地震数据进行了小波基础上的多尺度分析研究，结果表明由本文的算法得到的α提高了对地层边界划分的能力，而这些地层界面在传统的地震振幅显示则不明显.     

Major Characteristics of the Lajishan Orogenic Belt of the South Qilian Mountains and Its Geotectonic Attribute

The Lajishan orogenic belt is one of the E-W-trending Caledonian erogenic belts within the Qinling-Qilian orogenic system. It was formed upon the Jiningian basement by intensive taphrogenesis. Its major characteristics comprise the prominent faulting along the north and south boundaries, the highly complicated petrological and petro-geochemical features of the volcanic rock series, and the development of a new type of ophiolite suite. In terms of tectonic analysis and the sequential analysis of tectonic settings of magmatic rocks, it is suggested that the Lajishan orogenic belt has undergone a complete "opening-closing" cycle, which can be further divided into 3 second-order "opening-closing" cycles. The composite characteristics of the "opening-closing" movement show that Laji Mountain is a typical fault orogenic belt. The fault orogenic belt is one of the most important types of intracontinental orogens. It is of critical theoretical and practical significance to summarize the characteristics and the     

多媒体技术在地理信息系统中的应用

将多媒体技术应用于地理信息系统中的关键问题是：如何有效地管理多媒体数据和空间数据;其次,在区域分析过程中,怎样实现多媒体播放功能．指出用扩充的关系数据模型作为多媒体数据模型较适宜;多媒体功能的实现则取决于多媒体数据的格式是否为ＲＩＦＦ格式以及对多媒体数据的应用要求．最后展示了多媒体技术在地理信息系统中的应用前景．     

热压薄壁金刚石钻头的设计制造与应用

对薄壁金刚石钻头的结构、钢体、加工工艺和规程进行了介绍与分析,并对薄壁金刚石钻头胎体作了不同配方的筛选,选出了ＧＷ１和ＧＷ２号配方,在室内和生产试验中取得了较好的效果。     

影响薄互层地震反射波特征因素分析

通过对楔状模型,两层,多层介质等厚或不等厚模型和实际井中反射系数序列的频谱分析,和对用不同主频不同类型,不同衰减系数子波的合成记录剖面的波形分析以及合成记录的频谱分析,初步认为,薄互层的单层时间厚度,子结构厚度是决定反射波特征,频谱特征的基础,薄互层的互层数,入射子波是重要的影响因素;在目前的常规地震勘探中,薄互层地震反射波多以时间不可分辨的面貌出现,因此为了得到特定薄互层结构的可分辨的最佳图像,     

De-bugging the 'millipede' porphyroblast microstructure: a serial thin-section study and 3-D computer animation

ABSTRACT Seventy-five spatially orientated, serial thin sections cut from a single rock containing ‘millipede’ porphyroblast microstructure from the Robertson River Metamorphics, Australia, reveal the three-dimensional (3-D) geometry of oppositely concave microfolds (OCMs) that define the microstructure. Electronic animations showing progressive serial sections of the 3-D microstructure are made available via the World Wide Web. The OCM amplitudes decrease regularly from a maximum in near-central sections to a minimum in near-marginal sections, whereas the OCM interlimb angles increase regularly from a minimum in near-central sections to a maximum in near-marginal sections. These observations illustrate that the OCMs are noncylindrical surfaces with culminations located in near-central sections. Because the porphyroblast cores appear to have been present before significant development of the syn-OCM foliation, all of the OCMs were formed by heterogeneous extension around these cores. The overall geometry of the OCMs described here reflects the strain state, and cannot be used to constrain deformation paths.     

Resistivity and induced polarization response of a thin sheet

The relevant potential theory is given for a current point source in the presence of a conductive slab embedded in a homogeneous host region of infinite extent. The thin sheet representation is obtained from the exact integral formulation by a simple mathematical limit process. The same result is also deduced directly at the outset by applying a thin sheet boundary condition. The apparent resistivity for a two electrode array is then computed for the case where the bore hole intersects the thin sheet at right angles. The corresponding results for the dilution factor, relevant to the induced polarization response, are also obtained. It is shown that the apparent resistivity and the dilution factor are constant when the potential and the current electrode straddle the sheet but there is a characteristic decrease as the electrodes move away from the sheet.     

矢量地图数据属性精度的检查与控制

介绍了地图属性数据的质量特征，属性数据质量检查与控制的依据；给出了属性精度的评价模型、内部数据结构；较详细地论述了属性数据正确性的检查方法。