sgems 手册.pdf

发布时间：2022-06-13 发布人：admin 分类：说明书资料大小：2.26M 资料格式：pdf 举报版权申诉

6a069708-b764-4b91-890f-c70108da877a.pdf-第1页.png

第1页 / 共87页

6a069708-b764-4b91-890f-c70108da877a.pdf-第2页.png

第2页 / 共87页

6a069708-b764-4b91-890f-c70108da877a.pdf-第3页.png

第3页 / 共87页

6a069708-b764-4b91-890f-c70108da877a.pdf-第4页.png

第4页 / 共87页

6a069708-b764-4b91-890f-c70108da877a.pdf-第5页.png

第5页 / 共87页

6a069708-b764-4b91-890f-c70108da877a.pdf-第6页.png

第6页 / 共87页

6a069708-b764-4b91-890f-c70108da877a.pdf-第7页.png

第7页 / 共87页

6a069708-b764-4b91-890f-c70108da877a.pdf-第8页.png

第8页 / 共87页

文本预览

Geostatistical Earth Modeling Software: User’s Manual Nicolas Remy May 2004

Contents 1 General Overview . . . . . . . . . . . . . . . . . . . . . . . 1.1 First Steps with GEMS . . . 1.1.1 A quick tour to the graphical user interface . . . . 1.1.2 A simple tutorial . 1.1.3 Automating tasks in GEMS . . . . . . . . . . . . . . . . . . . . . 1.2 Deﬁning a 3-D ellipsoid . . . 1.3 Variogram Model Speciﬁcation . . 1.4 File Formats . . . . . . . . . . . 1.4.1 Objects Files . 1.4.2 . . Parameter Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.5 Data Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Estimation Algorithms 2.1 Common Parameters 2.2 Kriging . . . Indicator Kriging . . 2.3 . . 2.4 CoKriging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Simulation Algorithms 3.1 Common Simulation Parameters . . . 3.2 SGSIM . . 3.3 SISIM . . . . . . . 3.4 COSGSIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 4 . . 4 . . . . 6 . . 11 . . 12 . . 15 . . 18 . . 18 . . 19 . . 21 24 . . 24 . . 25 . . 26 . . 31 35 . . 36 . . 36 . . 44 . . 54

CONTENTS 3 3.5 COSISIM . . 3.6 SNESIM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 . . 69

Section 1 General Overview GEMS, the Geostatistical Earth Modeling Software, is an example of software built from scratch using the GsTL. The source code of GEMS serves as an example of how to use GsTL facilities. GEMS was designed with two aims in mind. The ﬁrst one, geared toward the end- user, is to provide a user-friendly software which offers a large range of geostatistics tools: the most common geostatistics algorithms are implemented, in addition to more recent developments such as multiple-point statistics simulation. The user-friendliness of GEMS mainly comes from its non-obtrusive graphical user interface, and the possibility to directly visualize data sets and results in a full 3-D interactive environment. The second objective was to design a software whose functionalities could conveniently be augmented. New fea- tures can be added into GEMS through a system of plug-ins, i.e. pieces of software which can not be run by themselves but complement a main software. In GEMS, plug-ins can be used to add new (geostatistics) tools, add new grid data structures (faulted stratigraphic grids for example) or deﬁne new import/export ﬁlters. 1.1 First Steps with GEMS 1.1.1 A quick tour to the graphical user interface The graphical user interface (GUI) of GEMS is divided into 3 main parts, see Fig. 1.1: 4

1.1. FIRSTSTEPSWITHGEMS 5 Figure 1.1: GEMS’s graphical interface. The three main panels are highlighted in red. The top-right panel is the Algorithm Panel, the top-left is the Visualization Panel and the bottom is the Command Panel The Algorithm Panel The user selects in this panel which geostatistics tool to use and inputs the required parameters (see Fig. 1.2). The top part of that panel shows a list of available algorithms, e.g. kriging, sequential Gaussian simulation. When an algorithm from that list is selected, a form containing the corresponding input parameters appears below the tools list. The Visualization Panel One or multiple objects can be displayed in this panel, e.g. a Cartesian grid and a set of points, in an interactive 3-D environment. Visualization options such as color-maps are also set in the Visualization Panel. The Visualization Panel is shown in more details in Fig. 1.3.

6 SECTION1. GENERALOVERVIEW Figure 1.2: The 3 parts of the Algorithm Panel highlighted in red. The top part displays the list of available tools. The middle part is where the input parameters for the selected tool are entered. The Command Panel This panel is not shown by default when GEMS is started. It gives the possibility to control the software from a command line rather that from the GUI. It displays a history of all commands executed so far and provides an input ﬁeld where new commands can be typed (see Fig. 1.4). See tutorial 1.1.2 for more details about the Command Panel. 1.1.2 A simple tutorial This short tutorial describes a GEMS session in which ordinary kriging is performed on a 100 130 30 Cartesian grid. The data consist of a set of 400 points in 3-D space, with a rock porosity value associated to each data point. This point-set object is called porosity data.

1.1. FIRSTSTEPSWITHGEMS 7 Figure 1.3: The Visualization Panel. The left-hand side (highlighted in red) controls which objects (e.g. grids) are visible. It is also used to set display options, such as which color- map to use. The steps involved are the following: 1. Load the data set 2. Create a Cartesian grid 3. Select the kriging tool and enter the necessary parameters 4. Display and save the result

8 SECTION1. GENERALOVERVIEW Figure 1.4: The Command Panel Loading the data set The ﬁrst step is to load the data set into the objects database of GEMS. Click Objects j Load Object and select the ﬁle containing the data. Refer to section 1.4.1 for a description of the avail- able data ﬁle formats. When the object is loaded a new entry called porosity data appears in the Objects section of the Visualization Panel, as shown in Fig. 1.5. Figure 1.5: Object list after the data set is loaded Click in the square before the point-set name to display it. Displayed objects have a little eye painted inside the rectangle before their name. The plus sign before the square indicates that the object contains properties. Click on the plus sign to display the list of properties. Click in the square before the property name to paint the object with the corresponding property (see Fig. 1.6). Creating a grid The next step is to create the grid on which kriging will be performed. The grid we will create is a 3-D Cartesian grid with 100 130 30 cells. Click Objects j New Cartesian Grid to open the grid creation dialog. Enter the di- the lower left corner mensions of the grid, the coordinates of the origin of the grid, i.e.

分享到：

赞收藏

资料库

sgems 手册.pdf

相关推荐

课程资源

热门标签

最新资料