泌阳凹陷东南部核桃园组近岸水下扇与扇三角洲沉积特征比较及控制因素分析

doi:10.11743/ogg20150212

石油与天然气地质 ›› 2015, Vol. 36 ›› Issue (2): 271-279.doi: 10.11743/ogg20150212

泌阳凹陷东南部核桃园组近岸水下扇与扇三角洲沉积特征比较及控制因素分析

董艳蕾^1,2, 朱筱敏^1,2, 耿晓洁³, 王波⁴, 王珩¹, 江强^1,2, 郭雷^1,2, 韦敏鹏^1,2

1. 中国石油大学(北京) 地球科学学院, 北京 102249;
2. 中国石油大学(北京) 油气资源与探测国家重点实验室, 北京 102249;
3. 中国地质大学(北京) 能源学院, 北京 100083;
4. 中海油能源发展股份有限公司工程技术分公司, 天津 300452

收稿日期:2013-10-10 修回日期:2014-02-26 出版日期:2015-04-08 发布日期:2015-05-13
通讯作者: 朱筱敏(1960-),男,教授,层序地层和沉积储层研究.E-mail:xmzhu@cup.edu.cn. E-mail:xmzhu@cup.edu.cn
作者简介:董艳蕾(1972-),女,博士、讲师,层序地层学及地震沉积学.E-mail:yanleidong@163.com.
基金资助:
国家自然科学基金项目(41202078,41272133);中国石油大学(北京)科研基金资助项目(KYJJ2012-01-31).

Sedimentary characteristics comparison and controlling factors analyses of nearshore subaqueous fan and fan delta in the Hetaoyuan Formation of southeastern Biyang Sag

Dong Yanlei^1,2, Zhu Xiaomin^1,2, Geng Xiaojie³, Wang Bo⁴, Wang Heng¹, Jiang Qiang^1,2, Guo Lei^1,2, Wei Minpeng^1,2

1. College of Geosciences, China University of Petroleum, Beijing 102249, China;
2. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China;
3. School of Energy Resources, China University of Geosciences, Beijing 100083, China;
4. CNOOC EnterTech-Drilling & Production Co., Tianjin 300452, China

Received:2013-10-10 Revised:2014-02-26 Online:2015-04-08 Published:2015-05-13

摘要/Abstract

摘要：

南襄盆地泌阳凹陷南部陡坡带核桃园组发育大量的砂砾岩体。这些砂砾岩体与鼻状构造配置形成该凹陷重要的油气藏。但是，前人对砂砾岩体成因的研究一直存在较大的争议，主要争论集中于砂体成因是扇三角洲成因还是近岸水下扇成因。为了明确砂砾岩体的成因及平面展布，在高精度层序地层格架建立的基础上，主要利用对比的方法，从沉积相发育背景、沉积亚相及微相划分、钻测井特征、岩心特征、粒度分布特征及地震反射特征6个方面，对这两种相类型进行了总结对比，并对控制因素进行了初步的探讨。研究结果表明，边界大断裂的活动造成的断层陡缓程度的差别对工区砂体成因类型起着重要的控制作用。在平面上，断层较缓（55°～75°）的西部地区发育扇三角洲；而在断层较陡（75°～90°）的东部地区，则发育近岸水下扇。在地震剖面上，早期断层比较陡，易沉积近岸水下扇；晚期断层比较缓，易沉积扇三角洲。

关键词: 近岸水下扇, 扇三角洲, 砂砾岩体, 构造控制作用, 核桃园组, 泌阳凹陷, 南襄盆地

Abstract:

Coarse-grained clastic deposits are widely developed in the Hetaoyuan Formation of the steep slope belt in southern Biyang Sag of Nanxiang Basin.They together with nose-like structures in the sag form many high-quality oil and gas reservoirs.However,the genesis of these deposits is still uncertain.The bone of contention is whether they are fan delta genesis or nearshore subaqueous fan genesis.To answer the question and get a better look at how they are distributed horizontally,we compared and summarized the two geneses and discussed their controlling factors in a stratigraphic sequence framework and from the following 6 perspectives of sedimentary settings,subfacies and microfacies categorization,drilling and logging data,core analyses,grain size distribution features and seismic response characteristics.The results show that the steepness difference of faults caused by large boundary faulting activities controlled their genesis.Horizontally,fan deltas are developed in the west area with gentle faults(55°-75°)while nearshore subaqueous fans are deve-loped in the east area with steep faults(75°-90°)nearshore. Seismic profiles also show that early faults are steeper and favorable for the deposition of nearshore subaqueous fans;while later faults are more gentle and good for fan delta to be formed.

Key words: nearshore subaqueous fan, fan delta, glutenite body, structural control, Hetaoyuan Formation, Biyang Sag, Nanxiang Basin

中图分类号:

TE121.3

董艳蕾,朱筱敏,耿晓洁,等. 泌阳凹陷东南部核桃园组近岸水下扇与扇三角洲沉积特征比较及控制因素分析[J]. 石油与天然气地质, 2015, 36(2): 271-279. doi: 10.11743/ogg20150212 Dong Yanlei,Zhu Xiaomin,Geng Xiaojie,et al. Sedimentary characteristics comparison and controlling factors analyses of nearshore subaqueous fan and fan delta in the Hetaoyuan Formation of southeastern Biyang Sag[J]. Oil & Gas Geology, 2015, 36(2): 271-279. doi: 10.11743/ogg20150212

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泌阳凹陷东南部核桃园组近岸水下扇与扇三角洲沉积特征比较及控制因素分析

Sedimentary characteristics comparison and controlling factors analyses of nearshore subaqueous fan and fan delta in the Hetaoyuan Formation of southeastern Biyang Sag

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