High-density digital 3D seismic acquisition technology and its application results in Qinglongtai area, Liaohe Oilfield

doi:10.3969/j.issn.1672-7703.2017.01.013

Abstract

Abstract: As the Liaohe Oilfield gradually enters the high-maturity exploration and development stage, it is difficult to research the microstructures, minor faults, small fault blocks and thin reservoirs by means of conventional seismic exploration technologies, and the seismic data is highly required in terms of signal-to-noise ratio, resolution and fidelity. In 2014, high-density digital 3D seismic acquisition technology was tested in the Qinglongtai area, the Liaohe Oilfield, for the purpose of evaluation and development of old oilfields. Based on experimental research, the high-density digital 3D seismic acquisition technology was developed with the features of small surface element, high folds, wide azimuth, dynamite source-vibrator combined excitation, single-point digital geophone receiving and low-noise receiving. Compared with the old data, the newly acquired seismic data is much better in quality. The frequency band ratio of single shot data is 21-25 Hz wider and the frequency band ratio of stack section is 12-14 Hz wider. The proposed technology provides better seismic data of the Qinglongtai area, so good evaluation and development results are obtained. It can be used as the reference for the digital 3D seismic acquisition in the future.

Key words: Liaohe depression, digital geophone, high resolution, high density, fold, wide azimuth

CLC Number:

P631.4

Li Mingsheng, Li Ya'nan, Dong Wenbo. High-density digital 3D seismic acquisition technology and its application results in Qinglongtai area, Liaohe Oilfield[J]. China Petroleum Exploration, 2017, 22(1): 106-112.

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