The influence of Permian igneous rock on the seismic imaging of underlying strata in Hanilcatam area,Tarim Basin

Sun Dong, Shi Xiao-qian, Wang Zhen-qing, Chen Li-xin, Wang Jing, Sun Jia-qing, Dai Dong-dong, Fang Qi-fei

doi:10.11764/j.issn.1672-1926.2018.10.019

Natural Gas Geoscience >

2018 , Vol. 29 >Issue 12: 1781 - 1787

DOI: https://doi.org/10.11764/j.issn.1672-1926.2018.10.019

The influence of Permian igneous rock on the seismic imaging of underlying strata in Hanilcatam area,Tarim Basin

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1.PetroChina Research Institute of Petroleum Exploration and Development-Northwest，Lanzhou 730020,China； 2.Exploration and Development Research Institute,Tarim Oilfield Company,PetroChina,Korla 841000,China

Received date: 2018-05-15

Revised date: 2018-10-23

Online published: 2019-01-14

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Abstract

In order to get an accurate view of the influence of thick igneous rock on the seismic imaging of the underlying strata,based on the actual drilling and logging data and the 3D seismic data,the Cambrian-Cretaceous simplified geologic model,and the finite difference method are used to solve the elastic wave equation.The forward equation simulation of the wave equation is carried out,the true restoration seismic imaging process is carried out,and the influence of the Permian igneous rock body on the seismic imaging of the underlying strata is discussed.Paleozoic oil and gas exploration and development play a certain reference.The results show that the high-speed and high-density Permian dacite have shielding effect on the seismic imaging of the underlying strata,and the amplitude of the reflected wave of the underlying strata is obviously weakened relative to the periphery of the covering area.Due to the lateral mutation of the lithology,the seismic imaging of the layers has obvious deformation and tectonic anomalies,rather than the seismic response of the fault zones or volcanic channels.The wavefield of fracture-cavern body in the disorder reflection region and underlying region of volcanics is very complex and the imaging velocity is difficult to pick accurately,which leads to distorted migration results and not convergent bead-like reflection.

Key words： Permian system; Igneous rock; Seismic imaging; Forward modeling; Carbonate rocks

Cite this article

Sun Dong, Shi Xiao-qian, Wang Zhen-qing, Chen Li-xin, Wang Jing, Sun Jia-qing, Dai Dong-dong, Fang Qi-fei . The influence of Permian igneous rock on the seismic imaging of underlying strata in Hanilcatam area,Tarim Basin[J]. Natural Gas Geoscience, 2018 , 29(12) : 1781 -1787 . DOI: 10.11764/j.issn.1672-1926.2018.10.019

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