灰质背景下浊积岩储层地震响应特征及识别方法——以东营凹陷董集洼陷为例
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于正军,男,高级工程师,博士,从事油气藏勘探综合研究。联系电话:(0546)8797276,E-mail:yuzj_789@163.com。

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国家科技重大专项“渤海湾盆地精细勘探关键技术”(2011ZX05006)。


Seismic response characteristics and recognition method of turbidity under carbonate depositional environment-a case in Dongji sag of Dongying sag
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    摘要:

    近年来浊积岩油藏预测的成功率和勘探效益有所降低,灰质成分的存在是影响浊积岩储层预测精度的主要因素。从岩性组合、振幅、速度、波阻抗等特征入手,明确了东营凹陷董集洼陷含灰质成分岩石的地球物理响应特征,确定了灰质背景下浊积岩储层地震识别方法。利用子波分解技术优选适用子波重构新的地震道来消除灰质背景,以提高地震资料的分辨率;通过基于振幅和频率特征的多属性联合分析技术获得的幅频比能够有效压制灰质能量,放大浊积岩储层的信息并确定其边界;利用叠前反演技术获取纵、横波速度比和纵波阻抗来剔除灰质影响,进而确定浊积岩储层分布规模及与邻区储层的展布关系。

    Abstract:

    Success rate and exploration benefit of turbidity prediction decreased in recent years, the main factor of which is the effects of carbonate. Starting with the characteristics of lithologic association, amplitude, vector and impedance, the carbonate geophysical response is studied deeply in Dongji sag of Dongying sag, and the recognition method of turbidity in carbonate background is proposed.The wavelet reconstruction, using wavelet decomposition by choosing the right wavelet, could remove the carbonate background and enhance the resolution. The ration of amplitude to frequency, which was calculated by attributes synthesis based on amplitude and frequency, is able to suppress the carbonate energy and strengthen the boundary information of turbidity. The ration of compressional wave velocity to shear wave velocity, which is calculated by pre-stack inversion technique, can also weaken the carbonate energy and beneficial to study the turbidity scale and the relationship with adjacent area.

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于正军.灰质背景下浊积岩储层地震响应特征及识别方法——以东营凹陷董集洼陷为例[J].油气地质与采收率,2014,21(2):95~97

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  • 在线发布日期: 2015-06-10
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