吸收系数方法技术在油气预测中的应用
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摘要
随着地震勘探难度增加,地震资料解释多解性问题日益凸显。地震波在遇到粘滞性的油气层位时候会发生高频吸收的过程,依据此原理,对衰减参数的提取,为油气的发掘提供了方向。吸收系数方法技术对于油气藏的发现具有很大的贡献,形成一套针对于不同岩性的储层,采用不同方法的吸收系数技术,且结合当地的石油地质情况,研究波的传播规律,有着不错的前景。计算介质的吸收性质及其横向的变化可以用来预测地下岩石储层的岩性,厚度和是否含油气性,这为寻找到有效油气储层提供了一个重大突破口。本论文研究的目的是利用川南地区油气藏的地震资料,反演油气储层的吸收系数,从而确定储层的分布和油气存在的范围。
With increasing of the difficulty in seismic exploration, multi-solution problem of seismic data becomes increasingly prominent. When seismic wave encounters viscous oil and gas layers, it can produce high-frequency absorption process. According to this principle, seismic wave attenuation parameter extraction can provide the direction for exploring oil and gas. The seismic wave attenuation parameter extraction method has great contributions to discovery of reservoirs. Calculating dielectric absorption properties and its lateral change can predict the lithology, thickness and oiliness of reservoir, which can be a major breakthrough for finding effective oil and gas reservoirs. In this paper, based on seismic data oil and gas reservoirs in Southern Sichuan, absorption coefficients of the oil and gas reservoirs were inversed to determine reservoir distribution and existing scope of oil and gas.
With increasing of the difficulty in seismic exploration, multi-solution problem of seismic data becomes increasingly prominent. When seismic wave encounters viscous oil and gas layers, it can produce high-frequency absorption process. According to this principle, seismic wave attenuation parameter extraction can provide the direction for exploring oil and gas. The seismic wave attenuation parameter extraction method has great contributions to discovery of reservoirs. Calculating dielectric absorption properties and its lateral change can predict the lithology, thickness and oiliness of reservoir, which can be a major breakthrough for finding effective oil and gas reservoirs. In this paper, based on seismic data oil and gas reservoirs in Southern Sichuan, absorption coefficients of the oil and gas reservoirs were inversed to determine reservoir distribution and existing scope of oil and gas.
引文
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[3]程荃,等.地球物理学与勘查技术与工程课程设计指导讲义[M].成都理工大学地球物理学院地球物理实验室,2013.
[4]李录明,李正文.地震勘探原理,方法和解释[M].北京:地质出版社,2005.
[5]牟永光.地震勘探资料数字处理方法[M].石油工业出版社,1981.
[6]李录明,罗省贤.信号与系统分析[M].成都:电子科技大学出版社,2002.
[7]高静怀,陈文超,李幼铭,等.广义S变换与薄互层地震响应[J].地球物理学报,2003,46(4):526-532.
[8]王宁,桂志先,陈洁,齐虹.基于短时傅里叶变换的频谱比法提取吸收系数及应用[J].石油天然气学报,2012,34(6):3-7.