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Comparative study of DAS and geophone VSP dataNormal access

Authors: Y.Z. Chen, G. Yu, Y.P. Li, X.L. Guo, J.H. Huang and J.J. Wu
Event name: 80th EAGE Conference & Exhibition 2018 Workshop Programme
Session: WS08: Fibre Optic Sensors in Surface and Borehole Geophysics
Publication date: 11 June 2018
DOI: 10.3997/2214-4609.201801924
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 479.73Kb )
Price: € 20

Summary:
Distribute Acoustic Sensing (DAS) is kind of sensing system using optical fiber as sensing element and transmitting signal medium. Optical fiber acquisition has become an important development trend of borehole seismic technology due to its advantages such as full well coverage, high sampling rate, high efficiency, high temperature and pressure resistance and economic. In this paper, a dual-well Walkaway DAS VSP data was acquired at Liaohe oilfield in East China. We analyzed the advantages and disadvantages of DAS VSP data with that acquired with geophone. We believe that in the area of East China, with the simple surface conditions, the casing settled cable acquisition can get high sampling and quality VSP data, it shows potential application of DAS VSP technology in oil and gas exploration and development.


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