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JZ31-6气田是近年在渤海辽东湾海域发现的一个岩性气田,标志着渤海海域隐蔽油气田勘探取得了可喜的突破,其中,针对薄而复杂多变的陆相储层高精度地震预测技术在该气田钻前发现中起到了关键性的作用。在对该目标地质情况及常规地震资料分析的基础上,引进和研究开发了一系列新技术,包括Hilbert-Huang变换、混合相位反褶积、基于广义S变换的高精度频谱成像与高精度岩性—物性反演技术等,摸索出了一套适合研究区地质特点的陆相储层高精度地震预测技术流程。利用上述技术和流程不但提高了地震资料保幅处理水平,而且成功、有效地预测了其储层和含气性,储层预测精度可提高到5m(厚度),预测精度较以往有明显提高,预测结果也得到了实钻的证实。
The JZ31-6 gas field is a lithologic gas field discovered in the Liaodong Bay of Bohai Sea in recent years, which marks a gratifying breakthrough in the exploration of subtle oil and gas fields in the Bohai Sea. Among them, the prediction of high-precision seismic prediction of thin and complex terrestrial reservoirs in The discovery of the gas field before drilling played a key role. Based on the analysis of the target geological conditions and conventional seismic data, a series of new techniques have been introduced and researched and developed, including Hilbert-Huang transform, hybrid phase deconvolution, high-precision spectral imaging based on generalized S transform and high-precision rock Sexual-physical inversion technique, etc., a set of high-precision seismic prediction technology flow of terrestrial reservoirs suitable for the geological characteristics of the study area was explored. The above techniques and processes not only improve the level of amplitude preservation of seismic data, but also predict the reservoir and gas content successfully and effectively, and the prediction accuracy of reservoir can be increased to 5m (thickness). The prediction accuracy is obviously improved compared with the past, Forecast results have also been confirmed by real drilling.