白庙气田沙三段地震频谱衰减特征与含气性检测  

Characteristics of seismic frequency spectrum attenuation and gas-bearing detection in the third section of Shahejie Formation,Baimiao Gas Field

作　　者：宋红伟[1] 廖林[2] 边树涛[3] 潘秀梅 董艳蕾[3] 

机构地区：[1]中国石化西北油田分公司,新疆轮台841604 [2]广州海洋地质调查局,广东广州510760 [3]中国石油大学(北京)资源与信息学院,北京102249 [4]中油测井技术服务有限责任公司,北京100101

出　　处：《断块油气田》2012年第2期145-148,共4页Fault-Block Oil & Gas Field

基　　金：国家重点基础研究发展计划(973)项目"非均质地层地球物理响应特征"(2007CB209601);中国石油天然气集团公司科学研究与技术开发项目"物探新方法新技术研究"(2008A-1804)

摘　　要：以东濮凹陷南部兰聊断裂下降盘的白庙气田沙三段砂砾岩水下扇体为例,根据优选出的气层、水层和干层在测井资料和地震属性分析中的响应特征,通过反复试验,选取合理的时窗值及子波同态谱(Cepstral谱),采用基于模型的参量法估算地震波频谱衰减特征,开展地层含气性预测研究。结果表明,当时窗值选择100 ms,Cepstral延迟值为10时,地震波形稳定,而且分辨率高,含气砂体在地震中出现中高频衰减现象。与实钻成果对比发现,反演预测与钻井吻合率为82.4%。Based on the responses of optimized gas zone, water zone and dry znoe in logging data and seismic attributes, gas-beating detection on the glutenite subaqueous fan in the third section of Shahejie Formation in Baimiao Gas Field, which is located in the footwall of Lanliao Fault Zone, Dongpu Depression, is carried out through the selection of appropriate time-window length and wavelet spectra（Cepstral spectra） after experiments and through using the parameter method based on a model to estimate the characteristics ofseismic frequency spectrum attenuation. The study results show that the seismic wave is stable and indicates a high resolution, and that the high frequency attenuation presents in seismic operation for gas-bearing sandbody, when the time-window length is 100 ms and the lag of Cepstral spectrum is 10. Meanwhile, the results also show that the agreement rate of inversion prediction and drilling is 82.4% according to the drilled wells.

关 键 词：频谱衰减 含气性检测 沙三段 白庙气田 

分 类 号：TE122.23[石油与天然气工程—油气勘探]