Sand-shale interbed refined calibration: an example of Bingdong beach-bar sandstone in Dongying Depression
Li Baojuan1,2, Dong Chunmei1,2, Lin Chengyan1,2, Zhang Xianguo1,2, Ren Lihua1,2, Song Yamin3
1. School of Geosciences, China University of Petroleum (East China), Qingdao, Shandong 266580, China;
2. Shandong Key Laboratory of Reservoir Geology, Qingdao, Shandong 266580, China;
3. Research Institute, Shenzhen Branch, CNOOC, Guangzhou, Guangdong 510240, China
Abstract：We propose in this paper a refined calibration approach for sand-shale interbed with the “principle of re-calibration” under guidance of seismic facies and demonstrate an example of beach-bar sandstone of upper Es4 in Bingdong. Bingdong beach-bar sandstone locates in the lower part where oil shale is concentrated. It is characterized by deeply buried interbeds in a small stretching range. Based on the judgment of polarity on seismic sections and under the guidance of seismic facies, we calibrate precisely sand-shale interbed by this approach together with time-varying wavelet. The calibration results are verified by analyzing the corresponding relationship between amplitude and reflection coefficient series of targets.
Wang Yongshi, Liu Huimin, Gao Yongjin. Sandbody genesus and hydrocarbon accumulation mechanism of beach-bar reservoir in faulted-lacustrine basins: A case study from the upper of the fourth member of Shahejie formation, Dongying sag. Earth Science Frontiers,2012,19(1): 100-107.
Yang Haichang,Zhou Yu. Several key problems of synthetic seismogram applied in sequence correlation. Journal of Southwest Petroleum University(Science and Technology Edition), 2009, 31(4): 52-57.
Yang Peijie,Yin Xingyao. Summary of seismic wavelet pick up. OGP, 2008, 43(1): 123-128.
Li Baojuan,Dong Chunmei,Song Yamin et al. The law of recalibration for synthetic seismogram and its application in seismic interpretation[C/CD]. CPS/SEG Beijing 2014 International Geophysical Conference, 2014, 804-806.
Wu Xiangjie,Wang Ruiliang,Yuan Lizhong et al.High precision synthetic seismogram for sequence boundary calibration, taking the pearl river mouth basin as an example.Marine Geology Frontiers,2011,27(12):60-65.
Yun Meihou,Ding Wei.Analysis of seismic wavelet frequency.GPP, 2005, 44(6): 578-581.