| Visualization in Scientific Computing(ViSC) is a kind of theory, method and technology converting data and results produced from scientific computing process into graphics and images displaying on screen and making interactive management and interpretation of them through using computer graphics and image processing technique, which is an important research aspect of current computer science. The kernel problem of the research is to convert data into graphics and to make sheer bulk of data visual and understandable. That is to say, ViSC is the research concerning computer arithmetic on how to transform scientific data to visual information which can help scientists understand their meanings, whether the data are produced from computing or measuring, or from satellites transferred images, Computer Tomography or Magnetic Resonance Imaging. In short, ViSC is a subject applying computer graphics and images processing technique to computer science. The main content of ViSC research includes: 2D displaying technique, extracting curves and distilling boundary surfaces, contours from 3D data-block, profile displaying and protracting of 3D data and dynamic displaying of data field etc.At present, earth science research mainly includes: visualization of elastic wave in heterogeneous media, 3D visualization of seismic data and geology structures, displaying numerical stimulation in oil and gas resources evaluation and visualization of logging data etc.This paper was completed with the study of the important project named as "System of Multiple Data Comprehensive Interpretation in Water-flooded Zones" supported by Daqing Oil Field Company. The main work includes two parts: the first is the interactive interpreting plate adapted to water flashed oil bed, which includes single well data management, multiple well data management, graphic and image data management, single well interactive interpreting, multiple well interactive interpreting, well data visual display and output etc.；the second part uses the combination of Genetic Algorithms (GAS) with other methods to standardize geophysical well data and to calculate deposit parameters. This paper contributes mainly to well data visual display and output. The paper introduced the computer visualizing techniques. Several available algorithms have been discussed and tried here and more quickly and accurately methods were been selected out and applied to our plot. Except the grid method, inserting new knots into B—SPLINE curves, tracing contour and smoothing curve method, we also deeply studied the color model, light model, fill method and shading line method. So our visualized graphics and 3D-PLOT is of real time displaying and modifying properties and are very beautiful. The data management subsystem and visualized algorithms are important base of the well logging data interactive interpreting work.The older oil field which has been entered a high water flushed period and underground deposit has been become more application. The original thick layers of oil have changed into more thin bed or laminator with deferent permeability. The traditional valuation methods have many shortages. It is very important to build up an accurate and detail interpreting model for the changed beds with comprehensive application of large amount information, as well logging data, geological and other geophysical data, drilling and oil test and core analyzing data.According to the principles and arithmetic of computer visualization and characteristics of well logging data, the subsystem is accomplished based on IDL 5.5, which makes full use of grid data, interpolation, contour tracing, curves smoothing and 3D block data displaying including color, illumination, filling, eliminating and protracting etc. Besides, under the support of object oriented programming, we produce images which can be edited and modified including curves, contours, profiles, solid surfaces and 3D planes. We have successfully combined several new techniques and methods, such as the modern computer data...
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