基于优化处理的宽角度道集密度反演及应用

用密度属性参数进行含油气预测在海洋地震勘探中应用比较广泛,准确反演密度是油气检测的关键,文中探讨叠前道集优化处理对密度反演精度的影响,从叠前道集质量评价及优化处理出发,改善地震资料的品质(信噪比、振幅补偿合理性、远近道频率差异性),保证宽角度有效地震信号,提高道集资料保真度。在此基础上利用叠前三参数反演方法,获得密度参数,以此进行含油气预测。通过盲井验证,处理后道集资料有效提高了密度反演的精度,这将为油气勘探提供新的手段。

The density inversion based on optimized wide-angle gathers and its application

Accurate density inversion is the key to oil and gas prediction, which has been widely used in the offshore seismic explora?tion. The effect of prestack gathers optimization on the density inversion accuracy is discussed in the paper. Based on the prestack gath?ers quality evaluation and optimization, the quality of seismic data ( signal to noise ratio, amplitude compensation rationality, and fre?quency difference) has been improved, the wide?angle effective seismic signals have been ensured, and gathers data fidelity has been improved. On this basis, the prestack three parameters inversion method has been adopted to obtain the density parameters for oil and gas prediction. Validated by blind wells, processed gathers data could effectively improve the density inversion accuracy, which will provide new means for oil and gas exploration.