| 新疆克拉玛依油田六中区三叠系克下组冲积扇高频基准面旋回与砂体分布型式研究 |
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| 引用本文： | 吴胜和,伊振林,许长福,郭建刚,张保国,吴小军.新疆克拉玛依油田六中区三叠系克下组冲积扇高频基准面旋回与砂体分布型式研究[J].高校地质学报,2008,14(2). |
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| 作者姓名： | 吴胜和 伊振林 许长福 郭建刚 张保国 吴小军 |
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| 作者单位： | 1. 中国石油大学(北京)资源与信息学院,北京,102249
2. 中国石油,新疆油田分公司,勘探开发研究院,新疆,克拉玛依,834000 |
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| 基金项目： | 高等学校博士学科点专项科研项目 |
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| 摘 要： | 应用油田开发区密井网资料,对准噶尔盆地克拉玛依油田六中开发区三叠系中统克下亚组冲积扇高分辨率层序发育特征以及不同级次基准面旋回内部砂体的空间展布规律进行了研究。研究表明,该区克下组发育多级基准面上升半旋回,包括3个中期旋回,7个短期旋回及若干超短期旋回,反映了可容空间与沉积物补给速率比值(A/S比值)在纵向上的多级变化发育模式,即在A/S比值总体向上变大的背景上,有多个次级A/S比值向上变大的旋回。随着基准面的上升,砂体从克下组下部的连片状、过渡到中部的宽带状、再变为上部的窄带状。A/S比值控制着辫状水道的迁移,随着A/S比值的增加,砂体宽度和厚度变小。该研究对于油田开发中后期井网调整具有重要指导意义。
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| 关 键 词： | 冲积扇 基准面旋回 克拉玛依油田 三叠系 |
High Frequency Base-Level Cycles of Alluvial Fan and Distribution Patterns of Sandbodies of Lower Karamay Formation (Triassic) in Middle 6th District of Karamayi Oilfield, Xinjiang |
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| WU Sheng-he,YI Zhen-lin,XU Chang-fu,GUO Jian-gang,ZHANG Bao-guo,WU Xiao-jun.High Frequency Base-Level Cycles of Alluvial Fan and Distribution Patterns of Sandbodies of Lower Karamay Formation (Triassic) in Middle 6th District of Karamayi Oilfield, Xinjiang[J].Geological Journal of China Universities,2008,14(2). |
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| Authors: | WU Sheng-he YI Zhen-lin XU Chang-fu GUO Jian-gang ZHANG Bao-guo WU Xiao-jun |
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| Abstract: | Using the data of dense well net in the oil development area,the features of the high resolution sequence stratigraphy of alluvial fan and the distribution patterns of sandbodies in different base-level cycles of Lower Karamay Formation(Middle Triassic)in the Karamay Oilfield of Junggar basin are studied.The results show that the hierarchy base-level ascending hemicycles are well developed,including 3 middle-term cycles,7 short-term cycles and several super short-term cycles.It indicates the hierarchy change of the accommodation space to sediment supply ratios(A/S)in a vertical direction.Several smaller cycles with increasing A/S ratios are observed on a general increasing A/S background.The distribution patterns of sandbodies changed from sheet pattern at the bottom,through broad band pattern in the middle,to the narrow band pattern on the top of the Lower Karamay Formation.With the increasing A/S ratios which control the migration of braid channels,the width and thickness of sand bodies decreased. |
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| Keywords: | alluvial fan base-level cycles Karamay Oilfield Triassic |
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