天然气储量计算的数学地质模型法

对目前采用的容积法、压力降落法、排驱比容法等天然气储量计算方法进行了对比、分析 ,阐明了各种方法的应用条件及局限性。建立了采用气田、凝析气田、油气田的数学地质模型计算天然气藏储量的新方法。该方法全面考虑了影响气藏储量评价及动用程度的各项参数 ,解释科学、合理计算气藏不同开发时测的各个储层的动用储量及整个气藏的真实地质储量。

矿产普查勘探中成因地质模型法的作用分析

为了满足我国社会主义市场经济快速发展的需求以及促进我国各行各业的不断进步和发展,就必须满足其日常发展的能源和材料方面的需求。面对国民对于资源及能源消耗与需求的与日俱增,必须加大对于资源勘探方面的力度和强度,在这种形势下,成因地质模型法便应运而生。成因地质模型法不仅是当前在矿产资源勘探普查、预测评价方面的最好方法,而且代表了矿产资源勘探普查、预测评价方面的发展趋势。

成因地质模型法在矿产普查勘探中的作用探讨

随着科学技术的不断进步和现代化的要求,矿产勘探技术也在不断创新和发展。成因地质模型法作为一种新的勘探方法,成为了矿产普查勘探领域中的一种重要技术手段。本文旨在探讨成因地质模型法在矿产普查勘探中的作用,包括该方法的发展历程、在地质勘探和矿产普查中的应用、与传统野外地质勘探方法的比较以及该方法在优化矿产资源利用方面的作用。分析成因地质模型法在矿产普查勘探中的应用价值,对于提高矿产勘探技术水平有着重要的意义。

矿产普查工作中成因地质模型法的具体应用

目前的矿产资源预判工作在预判评价时,成因地质模型是主要的评价措施之一,并且逐渐得到了规模化应用,它能够全方位的探究矿床的形成原因,从中获得更深层次的内容,通过成因地质模型获得的理论依据更加科学合理,为“思维空间”的研究提供帮助,同时也对研究矿床的形成原理的探究有一定价值,在勘探矿产资源过程中,可以将这些矿床形成理论和资料作为依据。

成因地质模型法在矿产勘探中的应用

在我国的矿产普查的勘探工作中经常应用成因地质模型法,这是因为该模型法可以非常方便、有效的预测地质的实际情况。并且随着我国科学技术的不断发展,成因地质模型法已经渐渐成为一种发展趋势。而成因地质模型法主要是分析的是矿床的形成原因,从而将其得到的相关数据信息作为之后矿产资源开发工作的技术支撑。本文以成因地质模型法的具体含义和理论原理为切入点,来进一步分析其在矿产普查勘探中所存在的不足之处,从而更深入的研究其在这一领域的实际作用,希望能为矿产普查勘探行业提供一些参考依据。

基于三维地质模型的岩土工程有限元自动建模方法

在岩土工程有限元数值模拟中,复杂的地质环境使得建模困难,模型一般都被简化处理。其结果直接影响计算的准确性。借助地质模型能最大程度地表达地质实际的特点,将地质模型和数值模型相结合,提出一种新的岩土工程有限元建模方法——CRM地质模型转化法。其核心思想是将三维地质模型经过特定方式转化为符合有限元网格要求的数值计算模型。具体转化过程为:①根据计算范围对地质模型进行区域切割;②从切割模型提取控制数据进行网格重构;③对重构模型按地层属性自动剖分有限元网格;④将网格数据导入数值分析系统完成建模。通过编程实现与实例验证,这种方法能准确生成复杂模型网格,整体建模速度快,自动化程度高,且能方便地模拟开挖过程,并可为不同的数值分析系统使用,极大地提高了前处理工作的效率。

论高利润铀矿床的预测方法

本文根据俄罗斯铀资源现状和原子能工业发展需要,综合研究了世界上巨大内生和外生铀矿床的资料,提出了历史-地质学模式、成矿前提、预测方法、实例分析,预测了俄罗斯联邦铀成矿远景区,并将其纳入1995～2010年发展大纲。

Field analysis of metallogenic information and its application

Focusing on the issue to deal with inadequate extraction of metallogenic information especially geological information,a new method of extracting metallogenic information based on field model,i.e.the field analysis method of metallogenic information,was proposed.In addition,a case study by using the method of the extraction of metallogenic information from the west Guangxi and southeast Yunnan district as an example was performed.The representation method for the field models of metallogenic information,including the metallogenic influence field model and the metallogenic distance field model,was discussed by introducing the concept of the field theory,based on the characteristic analysis of the distance gradualness and the influence superposition of metallogenic information.According to the field theory superposition principle and the spatial distance analysis method,the mathematical models for the metallogenic influence field and the metallogenic distance field of point,line and area geological bodies were derived out by using parameter equation and calculus.Based on the metallogenic background analysis,the metallogenic information field models of synsedimentary faults and manganese sedimentary basins were built.The relationship between the metallogenic information fields and the manganese mineralization distribution was also investigated by using the method of metallogenic information field analysis.The instance study indicates that the proposed method of metallogenic information field analysis is valid and useful for extracting the ore-controlling information of synsedimentary faults and manganese sedimentary basins in the study area,with which the extraction results are significant both statistically and geologically.

An automatic unified modeling method of geological object and engineering object based on tri-prism(TP)

For the interaction relation between geological object and engineering object in some fields related to water conservancy and hydropower, a unified modeling idea was proposed. On the basis of summarizing both advantages and disadvantages of existing modeling methods, an automatic unified modeling method of both engineering and geological objects based on tri-prism(TP) model was presented. Through the lossless correction algorithm of deviated drill holes contained in this method, the real deviated drill holes could be corrected into the equivalent virtual vertical ones. And the correction accuracy fully meets the requirements of unified modeling. With the virtual vertical drilling data, TIN construction of both cover layer and other stratums would be built in order to obtain the 3D geological model. Then, the engineering design data would be introduced into the 3D geological model for achieving unified modeling. For this process, the volume subdividing and restructuring principles were introduced to deal with the spatial relationships between engineering object and geological object. In order to improve the efficiency of unified modeling, the reconstruction of TIN based on constraint information was also applied in this method. At last, the feasibility and validation of the unified modeling method as well as its relevant key algorithms were verified by specific experiments and analysis of results.

Modeling seismic wave propagation in a coal-bearing porous medium by a staggered-grid finite difference method

A staggered-grid finite difference method is used to model seismic wave records in a coal bearing, porous medium. The variables analyzed include the order of the difference calculations, the use of a perfect match layer to provide absorbing boundary conditions, the source location, the stability conditions, and dispersion in the medium. The results show that the location of the first derivative of the dynamic variable with respect to space is coincident with the location of the first derivative of the kinematic varable with respect to time. Outgoing waves are effectively absorbed and reflection at the boundary is very weak when more than 20 perfect match layer cells are used. Blot theory considers the liquid phase to be homogeneous so the ratio of liquid to solid exposure of the seismic source depends upon the medium porosity. Numerical dispersion and generation of false frequencies is reduced by increasing the accuracy of the difference calculations and by reducing the grid size and time step. Temporal second order accuracy, a tenth order spatial accuracy, and a wavelength over more than ten grid points gave acceptable numerical results. Larger grid step sizes in the lateral direction and smaller grid sizes in the vertical direction allow control of dispersion when the medium is a low speed body. This provides a useful way to simulate seismic waves in a porous coal bearing medium.

Three-dimensional geological modeling and its application in Digital Mine

The 3D geological modeling is the prerequisite and core foundation for Digital Mine.Although this new technology brings new opportunities and motivation for the mineral exploration industry,it still has many difficulties to be solved in this area.Based on the characteristics of mine data and the aim of Digital Mine construction,this paper introduces a theory including multi-source data coupling,multi-modeling methods integration,multi-resolution visualization and detection,and multidimensional data analysis and application.By analyzing problems such as the uncertainty in each step of the modeling process,we designed a novel modeling method that can be applied to the complex geological body modeling,mineral resource/reserve estimation,and the mining exploration engineering.Along with the process of mine exploration,development,and reclamation,3D modeling undergoes the process of"construction-simulation-revision"during which the 3D model is able to be dynamically updated and gradually improved.Based on the result of practical utilization,it is proven that the methodology introduced by this paper can be used to build an effective 3D model by fully using the mining data under the control of spatial information quality evaluation.Our experiments show that such a 3D model can be used to evaluate the mine resource and provide the scientific evidence to improve mining efficiency during the various stages of evolvement process in mine.