China Petroleum Exploration ›› 2007, Vol. 12 ›› Issue (5): 41-45,79.

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Wide Azimuth 3D3C Seismic Data Acquisition and Effect Analysis in Xinchang Area West of Sichuan

Ma Zhaojun,Tang Jianming and Huang Yujing   

  1. Ma Zhaojun1,Tang Jianming1,2,Huang Yujing1 1Deyang Branch,Sinopec Southwest Exploration and Production Research Institute,Deyang City,Sichuan Province 618000;2 College of Energy Resource,Chengdu University of Technology,Chengdu City,Sichuan Province 610059
  • Online:2007-10-15 Published:2007-10-15

Abstract: There are mainly tight sandstone fracture gas reservoirs in Xingchang area west of Sichuan. Although a vast gas reservoir is exploited in the deep-seated strata of 851-well location, original seismic data have many disadvantages in describing deep-seated gas reservoirs. For example, it is difficult to solve problems of fault distribution, reservoir heterogeneity, and fracture prediction based on the data. Therefore, research on wide azimuth 3D3C seismic exploration is conducted. Firstly, a field acquisition method is analyzed including wide 3D3C observation system, seismograph, method of improving resolution and signal-to-noise, and test on acquisition method. Secondly, seismic data acquired from the field including their folds of P and converted wave, shot quality, frequency scan, anisotropic feature, and profile quality are discussed, which indicates that the acquisition data offer basic data for research on fracture reservoirs and meet the requirements of research on fracture prediction, anisotropy, and AVO hydrocarbon examination. Lastly, some problems to be solved are raised in near future, such as orientation problem, noise problem, coupling problem, resolution, static correction of converted wave, and anisotropic problem.

Key words: Sichuan, Xinchang area, wide azimuth, 3D3C, observation system, anisotropy

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