东营凹陷民丰北带沙四上亚段砂砾岩体层序划分  

Glutenite Bodies Sequence Division of the Upper Es_4 in Northern Minfeng Zone of Dongying Sag

作　　者：邵绪鹏 张立强[2] 靳久强[1] 张立宽[3] 

机构地区：[1]中国石油勘探开发研究院,北京100083 [2]中国石油大学(华东)地球科学与技术学院,青岛266580 [3]中国科学院地质与地球物理研究所,北京100029

出　　处：《科学技术与工程》2017年第4期175-181,共7页Science Technology and Engineering

基　　金：国家油气科技重大专项(2011ZX05008-004);国家"973"项目(2011CB201105)资助

摘　　要：东营凹陷民丰北带地区砂砾岩体发育广泛,其岩电关系不明显;加之常规层序地层研究方法具有主观人为因素过多的弊端,制约了该地区层序地层研究工作的深化。基于测井资料的小波变换技术与基于地震资料的时频分析技术,与常规方法相比,具有定量划分层序地层的优势。在常规层序研究方法的基础上,综合利用以上两种技术,准确定量地划分了东营凹陷民丰北带地区沙四上亚段的四级层序。研究表明:基于测井资料的小波变换技术和基于地震资料的时频分析技术本质上具有一致性,都是在频率域定量划分层序地层;小波变换技术分辨率高,适用于有井区,地震时频分析技术适用性广,但分辨率低,两者需结合使用。东营凹陷民丰北带地区沙四上亚段地层为一个完整的三级层序,进一步可细分为5个四级层序,每个四级层序都具有粒度向上变细的正旋回的沉积特点。Glutenite bodies are widely developed in northern Minfeng zone of Dongying Sag. Their litho-electric methods involve relationship is not clear. In addition, as the conventional sequence stratigraphic research methods involve too many subjective human factors, it has limited deepening the sequence stratigraphy research of study are-a. The wavelet transform technique based on logging data and the time-frequency analysis technique based on seis-mic data have advantages of dividing sequence stratigraphy quantitatively comparing with the conventional methods. Under the basis of the conventional sequence research methods, the above techniques were used to divide the fourth-order sequence of the upper Es4 in northern Minfeng zone of Dongying Sag. The research shows that the wavelet transform technique based on logging data and the time-frequency analysis technique based on seismic data are essentially consistent, both of which divide sequence stratigraphy quantitatively in the frequency domain ; wave-let transform technique has a high resolution. It is suitable for areas with wells. The seismic time-frequency analysis technique has wide applicability, but a low resolution. Both of the techniques should be combined; the upper Es4 in northern Minfeng zone of Dongying Sag is a complete set of third-order sequence, which can be further subdivi-ded into 5 fourth-order sequences that have the depositional characteristics of fine-upward in granularity.

关 键 词：东营凹陷 民丰北带 小波变换技术 时频分析技术 沙四上亚段 层序地层 

分 类 号：TE121.12[石油与天然气工程—油气勘探]