瞬时频率属性在沉积相研究中的应用-以白音查干凹陷西部腾格尔组为例
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摘要
利用白音查干地区的测井、录井及地震资料。通过定性、定量两种手段进行瞬时频率与岩性的相关性分析,认为瞬时频率能够较好的区分砂泥岩。当砂岩百分比小于0.12时,瞬时频率属性为低频;当砂岩百分比为0.16～0.33时,瞬时频率为高频。通过瞬时频率切片与沉积相平面展布图对比分析发现,不同相类型的砂体在瞬时频率切片中具有明显不同的特征,辫状河三角洲砂体表现为沿物源方向延伸的枝状或朵状中高频区,滩砂表现为不规则滩状的高频区,坝砂在盆地边缘呈高频带状分布。此外,瞬时频率还可以进行物源分析、三角洲朵叶体识别和扇体叠置识别,是进行沉积体系、砂体展布和储层预测等方面研究的重要手段。
The effect of instantaneous frequency properties in sedimentary facies and the correlation of instantaneous frequency properties and lithologic in Baiyinchagan region are studied by using well logging and seismic data with qualitative analysis and quantitative analysis.It is showed that sand and shale can be distinguished through instantaneous frequency attribute.If the sandstone percentage is less than 0.12,the instantaneous frequency attribute appears as low frequency,else if the sandstone percentage ranges from 0.16 to 0.33,the instantaneous frequency occurs as high-frequency.In addition,different types of sand body show different characteristics in the plane of the instantaneous frequency.Braided river delta sand body is manifested as dendritic or flower-shaped high frequency area extending along the source direction.Beach exhibits in high frequency region of the irregular-shaped beach.Dam showed a high frequency ribbon in the edge of the basin.Instantaneous frequency attribute can also analyze the source,identify the delta lobes body and recognize the overlaying fan bodies.Therefore,instantaneous frequency is a very effective method for sedimentary system research,the sand body distribution and reservoir prediction.
The effect of instantaneous frequency properties in sedimentary facies and the correlation of instantaneous frequency properties and lithologic in Baiyinchagan region are studied by using well logging and seismic data with qualitative analysis and quantitative analysis.It is showed that sand and shale can be distinguished through instantaneous frequency attribute.If the sandstone percentage is less than 0.12,the instantaneous frequency attribute appears as low frequency,else if the sandstone percentage ranges from 0.16 to 0.33,the instantaneous frequency occurs as high-frequency.In addition,different types of sand body show different characteristics in the plane of the instantaneous frequency.Braided river delta sand body is manifested as dendritic or flower-shaped high frequency area extending along the source direction.Beach exhibits in high frequency region of the irregular-shaped beach.Dam showed a high frequency ribbon in the edge of the basin.Instantaneous frequency attribute can also analyze the source,identify the delta lobes body and recognize the overlaying fan bodies.Therefore,instantaneous frequency is a very effective method for sedimentary system research,the sand body distribution and reservoir prediction.
引文
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[3]赵军.地震属性技术在沉积相研究中的应用[J].石油物探,2004,43(增):67-69.
[4]黄云峰,杨占龙,郭精义,等.地震属性分析及其在岩性油气藏勘探中的应用[J].天然气地球科学,2006,17(5):739-742.
[5]徐亮.低序级断层的地震识别技术在惠民凹陷辛34断块中的应用[J].矿物岩石,2007,27(2):86-93.
[6]林春明,张志萍,李艳丽,等.二连盆地白音查干凹陷早白垩世腾格尔组沉积特征及物源探讨[J].高校地质学报,2009,15(2):226-239.
[7]张福顺,樊太亮,孙宜朴,等.二连盆地白音查干凹陷构造沉降对沉积的控制作用[J].地质力学学报,2003,9(2):136-141.
[8]徐会永,蒋有录,张立强,等.查干凹陷构造样式及其构造演化[J].油气地质与采收率,2008,15(4):13-15.
[9]李艳丽,林春明,岳信东.白音查干凹陷桑合地区早白垩世都红木组一段沉积演化及物源研究[J].中国地质,2009,36(1):214-227.
[10]岳信东,林春明,李艳丽.二连盆地白音查干凹陷下白垩统腾格尔组沉积相[J].沉积学报,2008,26(4):593-601.
[11]张福顺.白音查干凹陷扇三角洲与辫状河三角洲沉积[J].地球学报,2005,25(6):553-556.
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