| 摘要: |
| 针对砂砾岩地层古生物标志及标志层缺乏、地层划分对比困难的问题,初步探索出一种在地质背景和复合基 准面原则约束下,利用测井曲线小波变换时频分析进行砂砾岩体沉积基准面恢复,进行其期次细分及井间对比的方 法。以渤海湾盆地车镇凹陷北部陡坡带广泛发育的砂砾岩体为例,通过对三、四级基准面曲线的恢复,有效地实现 了井间等时地层对比。研究表明，自然伽马或声波时差等测井信号小波变换后得到的多尺度小波系数周期性的振 荡特征与各级层序旋回具有较好的对应关系,其高频成分的多级叠加可以较好地反映基准面变化特征,指导砂砾岩 体期次的精细划分与对比。 |
| 关键词: 小波变换 测井信号 沉积基准面 层序地层 砂砾岩 车镇凹陷 |
| DOI： |
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| 基金项目:国家科技攻关项目(2003BA613iWtt)和山东省自然科学基金项目(Q2003H)i). |
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| Division and correlation of glutenite sedimentary cycles based on base-level restoration using wavelet transform |
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XIAN Ben-zhong1,2,WANG Yong-shi3
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(1.State Key LabonUory of Petroleum Resource and Prospecting in China Ummmky of Petroleum 9 Beijing 102249 China;2. School of Resource and Information Technology in. China University of Petroleum, Beijing 102249; China;3. Geological Scientific Research Institute, Shengli Oilfield, SINOPEC,Dongying 2510151China)
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| Abstract: |
| Strata divisi如 and correlation is difficult for glutenite lacking paleaobioiogical fossils and iitbological maiicer horizons. A new method of division and correlation of glutenite1 s sedimentary cycles based on the base-level restoration using wavelet transform of logging data was preliminarily put forward according to geological setting and composite base-level principle. Taking Chezhen depression in Bohai Bay Basin as an the 3rd md 4出 base-level curves were restored and l sochronous sequence stratigraphy correlation between different wells was realized. The results show that the periodical vibrancy of multi-scale wavelet coefficient resulted from wavelet transform of garama ray log or interval transit time logging data re spond to different scale sequence cycles and the cmriposiie of hs^i-fm|uency wavelet codlicienfes represent the base-level change characteristics and may be used to classify and correlate glutenite sedimentary cycles. |
| Key words: wavelet transform logging data sedimentary base level sequence stratigraphy ^utenite Chezhen depression |
