Petroleum Exploration and Development >

2017 , Vol. 44 >Issue 4: 561 - 568

DOI: https://doi.org/10.11698/PED.2017.04.09

PETROLEUM EXPLORATION

Stepped and detailed seismic prediction of shallow-thin reservoirs in Chunfeng oilfield of Junggar Basin, NW China

  • SHU Ningkai1 ,
  • WANG Xinwen1 ,
  • SU Chaoguang2 ,
  • SONG Liang2 ,
  • NIU Xuemin2 ,
  • LI Qiang2
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  • 1. China University of Geosciences, Beijing 100083, China;
    2. Geophysical Research Institute, Sinopec Shengli Oilfield Company, Dongying 257022, China

Revised date: 2016-10-09

  Online published: 2017-07-27

Supported by

国家科技重大专项（2011ZX05028; 2016ZX05011）

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Abstract

In view of the problems of low signal-to-noise ratio and low resolution of seismic data in shallow-thin reservoir in Chunfeng Oilfield of Junggar Basin, stepped and detailed data processing and interpretation technologies are proposed for shallow-thin reservoir prediction. The overlapping type offset packet processing technology can increase seismic fold from 8 to 16 times and increase signal to noise ratio by 1.4 times at local low noise ratio area by fine processing including frequency upgrade and de-noise imaging techniques. This study established three-level prediction techniques including pre-stack improving resolution target processing, post-stack wavelet reconstruction frequency extension, pre-stack and post-stack joint inversion, which can increase sand resolution from 12 m to 2 m and improve the identification accuracy of reservoir efficiently. The shallow-thin reservoirs after frequency extension have continuous and defined reflections, which are well coincided with actual exploration. The seismic data have well ability of preserving amplitude, and achieve good application effects.

Key words： Junggar Basin; Chunfeng oilfield; Miocene Shawan Formation; reservoir prediction; wavelet reconstruction; pre-stack and post-stack joint inversion

Cite this article

SHU Ningkai1 , WANG Xinwen1 , SU Chaoguang2 , SONG Liang2 , NIU Xuemin2 , LI Qiang2 . Stepped and detailed seismic prediction of shallow-thin reservoirs in Chunfeng oilfield of Junggar Basin, NW China[J]. Petroleum Exploration and Development, 2017 , 44(4) : 561 -568 . DOI: 10.11698/PED.2017.04.09

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