于奇西地区舒善河组富泥低弯度河的识别与意义
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摘要
测井和录井资料表明于奇地区舒善河组具有褐色泥岩夹透镜状砂岩的富泥低弯度河特点,于奇西三维地震分频技术识别出了该组中部不同厚度的南北向直线状河道带的展布,其中40 Hz频率的振幅平面图反映了该层主河道带最大累加砂岩的展布,60 Hz和80 Hz频率的振幅平面图所反映的14.6 m及11 m左右的单河道砂岩展布与主河道位置相同,但宽度变窄。这些河道砂岩与雁列式断裂组合可望形成砂体断裂复合圈闭。
Logging data indicate that the Shushanhe formation in Yuqi area presents a character of brown mudstone with lenticular sandstone interbedded which stands for silt-laden and low-sinuosity channel.3-D seismic frequency division technique used in west Yuqi area recognizes longitudinal rectilinear figure channel belts of different thickness in middle of this formation.The amplitude plan of 40 Hz frequency reflects the largest cumulative sandstone spread of main channels in the strata,60 Hz and 80 Hz amplitude plans as the reflection of about 14.6 m and 11 m single-channel sandstone spread indicate that single-channels are in the same position with the main channel,but the width narrower.The channel sandstone and en echelon fault unit may be supposed to form sand body-fault compound traps.
Logging data indicate that the Shushanhe formation in Yuqi area presents a character of brown mudstone with lenticular sandstone interbedded which stands for silt-laden and low-sinuosity channel.3-D seismic frequency division technique used in west Yuqi area recognizes longitudinal rectilinear figure channel belts of different thickness in middle of this formation.The amplitude plan of 40 Hz frequency reflects the largest cumulative sandstone spread of main channels in the strata,60 Hz and 80 Hz amplitude plans as the reflection of about 14.6 m and 11 m single-channel sandstone spread indicate that single-channels are in the same position with the main channel,but the width narrower.The channel sandstone and en echelon fault unit may be supposed to form sand body-fault compound traps.
引文
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[2]KirklandJ I.Using hing resolution event stratigraphic methods todevelop taphofacies models in fine-grained fluvial strata;an ex-ample from the Late Jurassic Morrison Fm[J].Abstracts withPrograms-Geological Socity of America,1999,31(7):437-438.
[3]蒲仁海,翟晓先,等.塔河油田典型地震相[J].石油地球物理勘探,2007,42(30):308-314.
[4]Pu Renhai,Zhu Li,Zhong Hongli.3-D seismic identificationand characterization of ancient channel morphology[J].Journalof Earth Science,2009,20(5):858-967.
[5]蒲仁海,郭向东,钟红利.古代富泥低弯度河的识别与特征[J].西北大学学报,2009,39(4):624-630.
[6]李世雄.小波变换和反演数学基础[M].北京:地质出版社,1994:10-44.
[7]Partyka G,Gridley J,Lopez J.Interpretational application ofspectral decomposition in reservoir characterization[J].TheLeading Edge,1999,38(6):353-360.
[8]张延章,尹寿鹏,等.地震分频技术的地质内涵及其效果分析[J].石油勘探与开发,2006,33(1),64-71.