Application of Complex Geological Structure Prestack Seismic Imaging in M Block of Eastern Oil Fields

Zhao Yu-lian,Wang Yu-chao,Su Qin,Lv Bin,Lu Lie-qin,Wu Jie

doi:10.11764/j.issn.1672-1926.2011.06.1109

Natural Gas Geoscience >

2011 , Vol. 22 >Issue 6: 1109 - 1115

DOI: https://doi.org/10.11764/j.issn.1672-1926.2011.06.1109

Application of Complex Geological Structure Prestack Seismic Imaging in M Block of Eastern Oil Fields

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1.Chengdu University of Technology, Chengdu 610059,China;2.Northwest Branch of Research Institute
of Petroleum Exploration and Development, PetroChina, Lanzhou 730020,China

Received date: 2011-01-13

Revised date: 2011-10-14

Online published: 2011-12-10

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Abstract

The challenges for the complex geological structure imaging are the great changes in vertical and horizontal velocity in the complexity of surface and subsurface geological conditions. Pre-stack depth migration makes the fine imaging in the complex geological structures. By comparison with effect of pre-stack depth migration between Kirchhoff integration and wave equation, we propose data preparing, time-domain model, velocity-depth model, and chosen method of pre-stack depth migration during pre-stack depth migration realization. We use the Kirchhoff integration to get a fine velocity-depth model, which executes the several iterations and optimize velocity to target lines. We also use two methods to test the migration in the research area. The example results show that both two methods have ability to image accurately in the complex geological structure, but are different in signal to noise ratio. The wave equation is chosen in the high signal to noise ratio area, whereas the Kirchhoff integration does in the low one. The different migration methods need velocity-depth models. The effect of imaging is different in areas with signal to noise ratios.

Key words： Complex geological structure; Kirchhoff integration; Wave equation; Pre-stack depth migration; Signal to noise ratio.

Cite this article

Zhao Yu-lian,Wang Yu-chao,Su Qin,Lv Bin,Lu Lie-qin,Wu Jie . Application of Complex Geological Structure Prestack Seismic Imaging in M Block of Eastern Oil Fields[J]. Natural Gas Geoscience, 2011 , 22(6) : 1109 -1115 . DOI: 10.11764/j.issn.1672-1926.2011.06.1109

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