低频伴影技术在生物礁油气储层预测中的应用  

Application of Low-frequency Shadow Technology in Prediction of Organic Reef Oil and Gas Reservoir

作　　者：陈勇[1,2] 陈洪德[1] 关达[2] 文晓涛[3] 刘玉琦[2] 

机构地区：[1]成都理工大学沉积地质研究院,成都610059 [2]中国石油化工股份有限公司石油物探技术研究院,南京211103 [3]成都理工大学地球物理学院,成都610059

出　　处：《科学技术与工程》2013年第26期7613-7618,共6页Science Technology and Engineering

基　　金：国家"十二五"科技重大专项煤层气地球物理勘探关键技术(2011ZX05035-005)资助

摘　　要：含油气岩石对地震波的能量有衰减作用。当地震纵波穿过含油气地层时,波的能量将产生较大的频率衰减,在储层下方会出现低频强振幅的"低频伴影"现象。在低频率段,"低频伴影"特征明显,"低频伴影"的地震波反射能量较储层的地震波反射能量强。在高频率段,"低频伴影"的地震波反射能量较储层的地震波反射能量弱并随着频率升高逐渐减弱。选择川东北SYB1井区对"低频伴影"技术在生物礁油气储层预测中的应用进行研究,通过SYB1井和SYBc1井两口钻井的应用特征对比,有效结合"低频伴影"技术在含油气储层预测中的识别标志,得出"低频伴影"技术进行生物礁油气储层预测的适应性,证明了方法的正确性,为同类型油气储层预测工作提供参考依据。Rock with oil and gas can make attenuation to seismic wave. When seismic primary wave goes throw oil and gas formation, it will engender serious attenuation. Then, the low-frequency shadow with character of low frequency and strong amplitude will appear under the reservoir. In low frequency stage, low-frequency shadow is obvious, and the power of seismic reflection wave is stronger than the power of reservoir. In high frequency stage, the power of low-frequency shadow is lower than the power of reservoir and with the frequency goes up, the power weaken. Well SYB1 district as the research objective is choosed to study the application of low-frequency shadow technology in prediction of organic reef oil and gas reservoir. With the comparing of application character of well SYB1 and SYBcl, connected to the identification mark of low-frequency shadow technology in the prediction of oil and gas reservoir, low-frequency shadow technology is suitable in the prediction of organic reef oil and gas reservoir is found out. And the low-frequency shadow technology is valid, which will be the reference frame for the reservoir prediction of the same style is proved.

关 键 词：频率衰减 低频伴影 强振幅 储层预测 地震反射 

分 类 号：TE132.14[石油与天然气工程—油气勘探]