Integrated geophysics research on distribution of turbidite sand body in E2s3, Binnan oilfield
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P631.44

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    Abstract:

    The E2s3 formation of Binnan oilfield is developed in basin rift epoch. Because of the adequate sediments, many kinds of turbidite sediment reservoirs are developed. However, due to the restriction of seismic data’s quality and facies change, great progress has not been made in the exploration of turbidite reservoirs in Binnan oilfield. This paper aims at practical problems of turbidite reservoirs identification and introduces a workflow: establishing sequence framework-analyzing seismic response characteristics (amplitude, continuity etc.)-attribute analysis with strata slice-spectral decomposition-log-constrained seismic inversion, and the issues above are perfectly solved. According to the seismic response, log and drilling characteristics, this paper divides the E2s3 formation into three sequences, and the turbite reservoirs is mainly developed in mid E2s3 & lower E2s3; the favorable turbidite reservoirs development sites are anticipated by using 90° phase rotation, strata slice and instantaneous amplitude technology, the result shows that the turbidite reservoirs is mainly developed in southeast and the neighboring areas of Binxian prominence; by application of S-Transformation, the initial seismic data is decomposed into 25, 30, 35, 40 and 45 Hz single-frequency data-bodies, among which, the 40 Hz single-frequency data-body shows a better resolving ability of turbidite reservoirs; and then, in combination with the log-constrained seismic inversion and 40 Hz single-frequency data-body, the vertical overlap features of turbidite sandbodies are clear, and favorable development sites of turbidite reservoirs are proposed.

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Li Ye, Zheng Deshun, Tang Jie. Integrated geophysics research on distribution of turbidite sand body in E2s3, Binnan oilfield[J]. Petroleum Geology and Recovery Efficiency,2013,20(6):46~50

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  • Received:
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  • Online: September 02,2015
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