• Title/Summary/Keyword: 3차원 탄성파 자료

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3-D Visualization of Reservoir Characteristics through GOCAD (GOCAD를 이용한 저류층 속성정보의 3차원 시각화 연구)

  • Gwak Sang-Hwan;Lee Doo Sung
    • Geophysics and Geophysical Exploration
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    • v.4 no.3
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    • pp.80-83
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    • 2001
  • Four seismic reflection horizons in 3-D seismic data, coherence derived from the seismic data, and 38 well logs from the Boonsville Gas Filed in Texas were tried to be integrated and visualized in 3 dimensions. Time surface was constructed from pick times of the reflection horizons. Average velocities to each horizon at 38 well locations were calculated based on depth markers from the well logs and time picks from the 3-D seismic data. The time surface was transformed to depth surface through velocity interpolation. Coherence was calculated on the 3-D seismic data by semblance method. Spatial distribution of the coherence is captured easily in 3-D visualization. Comparing to a time-slice of seismic data, distinctive stratigraphic features could be correctly recognized on the 3-D visualization.

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Static Correction of Land 3D Seismic Data (육상 3차원 탄성파 자료의 정보정)

  • Sheen Dong-Hoon;Park Jae-Woo;Ji Jun;Lee Doo-Sung
    • Geophysics and Geophysical Exploration
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    • v.5 no.3
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    • pp.145-149
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    • 2002
  • The static correction, which is classified into refraction based static correction and reflection based residual static correction, removes distortions caused by irregularities of thickness or velocity in near-surface. Generally, refraction statics is a time consuming process because of high dependence on the interpreter's analysis. Therefore, for huge 3D seismic data, automatic static correction which minimizes the interpreter's analysis is required. In this research, we introduce an efficient method of refraction static correction for land 3D seismic survey.

A 3 dimensional Visualization System for 3-D Seismic Data Analysis (3차원 탄성파 자료분석을 위한 3차원 시각화 시스템)

  • Lee, Doo-Sung;Kim, Hyoun-Gyu
    • Geophysics and Geophysical Exploration
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    • v.5 no.2
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    • pp.71-77
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    • 2002
  • We developed a modeling and visualization software that can analyze 3-dimensional seismic data. The software divides 3 dimensional space into a series of vertical and horizontal polygons, and allows the various seismic attributes and other spatial information to be stored on these polygons. The program can pick a particular pattern in semi-automatic mode, and store the pattern in the spatial DB. The pattern can be modeled and visualized in 3 dimensional space.

3D Seismic Data Processing Methodology using Public Domain Software System (공유 소프트웨어 시스템을 이용한 3차원 탄성파 자료처리 방법론)

  • Ji, Jun;Choi, Yun-Gyeong
    • Geophysics and Geophysical Exploration
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    • v.13 no.2
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    • pp.159-168
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    • 2010
  • Recent trend in petroleum/gas exploration is an application of 3D seismic exploration technique. Unlike the conventional 2D seismic data processing, 3D seismic data processing is considered as the one which requires expensive commercial software systems and high performance computer. This paper propose a practical 3D seismic processing methodology on a personal computer using public domain software such as SU, SEPlib, and SEPlib3D. The applicability of the proposed method has been demonstrated by successful application to a well known realistic 3D synthetic data, SEG/EAGE 3D salt model data.

3D Seismic Travel-time Tomography using Fresnel Volume (프레넬 볼륨을 이용한 3차원 탄성파 주시 토모그래피)

  • Ko, Kwang-Beom;Lee, Doo-Sung
    • Geophysics and Geophysical Exploration
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    • v.6 no.2
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    • pp.101-107
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    • 2003
  • 3D seismic travel-time tomography algorithm baled on Fresnel volume was developed and its feasibility was investigated by the numerical experiments. To testify the field applicability of the developed algorithm, frequency characteristics and way coverage of the crossholel seismic raw data were investigated and 3D velocity tomogram cube with about 8m spatial resolution was obtained. When compared this 3D velocity cube with the conventional 2D ray tomogram, two results were matched well. We concluded that 3D seismic tomography algorithm developed in this study has enough potential to the field application.

3-D seismic data processing system for underground investigation (지반 조사를 위한 3차원 탄성파 자료처리시스템)

  • Sheen Dong-Hoon;Ji Jun;Lee Doo Sung
    • 한국지구물리탐사학회:학술대회논문집
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    • 2000.09a
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    • pp.147-157
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    • 2000
  • Primary purpose of the system developed in this study is 3-D seismic data processing system for underground investigation and this system is developed in PC based on Linux for lower-cost system. Basic data processing modules are originated from SU (Seismic Unix) which is widely used in 2-D seismic data processing and auxilious modules are developed for 3-D data processing The system which is constructed by using these data processing modules Is designed to GUI (Graphic User Interface) in order that one can easily control and for this purpose, GTK (Gimp Tool KiT) conventionally adapted in producing Linux application.

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Field Application of 3D seismic travel-time tomography (3차원 탄성파 지대공 토모그래피 현장 적용)

  • Moon, Yun-Seop;Ha, Hee-Sang;Lim, Harry;Ko, Kwang-Beom
    • 한국지구물리탐사학회:학술대회논문집
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    • 2006.06a
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    • pp.233-237
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    • 2006
  • 3D travel time tomography was conducted to characterize the subsuface structure in the valley area. In this study, an area($200m{\times}200m$), where borehole informations were available to aid in the interpretation, was covered with wide source/receiver coverage. In data acquisition, both hole to hole and reverse VSP array was employed. For the inversion, 3D seismic traveltime tomography algorithm based on Fresnel volume was implemented. When compared 3D velocity cube with the geological survey and drilling logs, both results were matched well. From this, we concluded that 3D seismic travel time tomography has enough potential to the field application.

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Development of a PC-based 3-D Seismic Visualization Software (PC 기반의 3차원 탄성파 자료 시각화 소프트웨어 개발 연구)

  • Kim, Hyeon-Gyu;Lee, Doo-Sung
    • Geophysics and Geophysical Exploration
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    • v.6 no.1
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    • pp.35-39
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    • 2003
  • A software to visualize and analyse 3-D seismic data is developed using OpenGL, one of the most popular 3-D graphic library, under the PC and Windows platform. The software can visualize the data as volume and slices, whose color distribution is specified by a special dialog box that can pick a color in RGB or HSV format. The dialog box can also designate opacity values so that several 3-D objects can be displayed superimposed each other. Horizon picking is implemented very easily with this software thanks to the guided picking method. The picked points from a horizon will compose a set of points, mesh, and a surface, which can be viewed and analysed in three dimensions.

A Field Application of 3D Seismic Traveltime Tomography (II);Application of 3D Seismic Traveltime Tomography to a dam-planned area (3차원 탄성파 토모그래피의 현장 적용 (II);댐 예정지에서의 3차원 토모그래피 적용 사례)

  • Moon, Yoon-Sup;Ha, Hee-Sang;Ko, Kwang-Buem;Kim, Ji-Soo
    • Tunnel and Underground Space
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    • v.18 no.4
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    • pp.263-271
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    • 2008
  • 3D seismic tomography technique was assessed for applicability of developed 3D tomography algorithm based on Fresnel volume in the dam-planned area. Reconstructed 3D tomogram based on Fresnel volume and Fast Marching Method(FMM) reveals similar velocity structure to the other geotechnical survey results. With the correlation analysis between RMR data and seismic velocity information, it could provide reliable information of rock mass rate. The applicability of 3D seismic tomography was verified in this study. It would be expected to apply 3D tomography with new developed first arrival calculation and inversion algorithm to the engineering field economically.

An Automatic Discontinuity Extraction Method from 3D Seismic Data (3차원 탄성파 자료로부터 불연속면 자동 추출기법)

  • Ji Jun
    • Geophysics and Geophysical Exploration
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    • v.4 no.3
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    • pp.89-95
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    • 2001
  • The final goal of the seismic method is to verify the spatial characteristic of subsurface media. For this purpose, professional interpreters interprete the discontinuities of seismic events from seismic image. This paper introduces a method for automatic discontinuity extraction from 3D seismic image. The method consists of three steps. The first step is for estimating coherency of seismic events from seismic data. The second step is to express the potential region where discontinuities may exist in the form of binary image. The third step is to locate the discontinuities by thining the region found in the second step.

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