断陷湖盆早期浅水三角洲沉积——以高邮凹陷永安地区戴一段为例

doi:10.13278/j.cnki.jjuese.201703102

吉林大学学报(地球科学版) ›› 2017, Vol. 47 ›› Issue (3): 659-673.doi: 10.13278/j.cnki.jjuese.201703102

断陷湖盆早期浅水三角洲沉积——以高邮凹陷永安地区戴一段为例

朱兆群¹, 林承焰¹, 张宪国¹, 李志鹏², 谢晶晶³, 魏肃东⁴, 程平⁵

1. 中国石油大学(华东)地球科学与技术学院, 山东青岛 266580;
2. 中国石化胜利油田勘探开发研究院, 山东东营 257061;
3. 中海石油(中国)有限公司上海分公司, 上海 200030;
4. 中海油田服务股份有限公司, 河北廊坊 065200;
5. 中国石化江苏油田分公司试采一厂, 江苏江都 225265

收稿日期:2016-08-10 出版日期:2017-05-26 发布日期:2017-05-26
作者简介:朱兆群(1986-),男,博士研究生,主要从事油气储层沉积学及石油地质方面的研究,E-mail:zzq86@126.com
基金资助:
国家科技重大专项（2011ZX05009-003）

Shallow-Water Delta Deposits in a Rifting Lacustrine Basin During Early Stage:A Case Study of the First Member of Dainan Formation at Yong'an Area, Gaoyou Sag

Zhu Zhaoqun¹, Lin Chengyan¹, Zhang Xianguo¹, Li Zhipeng², Xie Jingjing³, Wei Sudong⁴, Cheng Ping⁵

1. School of Geosiences, China University of Petroleum, Qingdao 266580, Shandong, China;
2. Research Institute of Exploration and Development, Shengli Oilfield, SINOPEC, Dongying 257061, Shandong, China;
3. Shanghai Branch Company, CNOOC Ltd, Shanghai 200030, China;
4. China Oilfield Service Limited, Langfang 065200, Hebei, China;
5. No.1 Oil Production Factory, Jiangsu Oilfield Company,SINOPEC, Jiangdu 225265, Jiangsu, China

Received:2016-08-10 Online:2017-05-26 Published:2017-05-26
Supported by:
Supported by National Science and Technology Major Project (2011ZX05009-003)

摘要/Abstract

摘要： 浅水三角洲作为沉积学和油气勘探领域的热点，目前研究主要集中在大型拗陷型盆地内，对断陷湖盆关注较少。通过充分调研区域地质背景并结合永安地区戴一段的岩心、录井、测井、地震、分析化验等资料进行系统研究后认为，戴一段处于断陷早期，地形较为平缓，水体宽浅且波动频繁，气候温暖湿润，物源供给充足，具备形成浅水三角洲的有利沉积条件。研究区浅水三角洲为近源沉积，以牵引流为主；砂岩中多见强水动力沉积构造；垂向上发育进积、加积的沉积序列，具平行、亚平行及叠瓦状地震反射特征；以前缘亚相为主体，相带宽阔，可分为内、外前缘沉积，水下分流河道构成主要骨架砂体；在向湖推进过程中受沉积物可容纳空间与沉积物补给量比值（A/S）变化的影响较大，不同成因砂体类型及沉积样式呈现有规律的分布。基于以上分析，最终建立了断陷湖盆早期浅水三角洲的沉积模式，在一定程度上对丰富浅水三角洲的沉积学认识并拓展永安地区乃至整个高邮凹陷斜坡带油气勘探的领域和范围具有一定指导意义。

关键词: 浅水三角洲, 断陷湖盆, 沉积模式, 高邮凹陷, 戴一段

Abstract: Shallow-water delta, as a focus of sedimentology and hydrocarbon exploration, has gotten more attentions in depression lacustrine basin than in rift lacustrine basin. Based on the systematic study of regional geological background in combination with the analysis of cores, well logging, seismic, and test data, it is inferred that when the first member of Dainan Formation was deposited in early rifting stage, the geological conditions with gentle terrain, wide and shallow water, frequently fluctuant lake level, warm and humid climate, and adequate sediment supply were favorable for the formation of shallow-water delta. The shallow-water delta deposits are near to the sediment source and dominated by traction current. Plenty of sedimentary structures caused by strong hydrodynamics have been commonly found in cores. It developed sedimentary sequences of progradation and aggradation vertically and it is characterized by paralleling, sub-paralleling and imbricated seismic reflections. The shallow-water delta front is composed of the main type of sedimentary subfacies, which is widely distributed and can be divided into inner front and outer front. The major sand bodies come from the subaqueous distributary channels in delta front. Different types of sand bodies and sedimentary styles exist and evolve regularly towards the center of lake, which is deeply affected by the change of the ratio of accommodation to sediment supply (Abbr. A/S). Based on above, the sedimentary model of shallow-water delta in rifting lacustrine basin during the early stage was built up, which could contribute to enriching the understanding of shallow water delta in sedimentary perspective and broadening the hydrocarbon exploration domain to certain extent for the study area and even the whole slope belt of Gaoyou sag.

Key words: shallow-water delta, rifting lacustrine basin, depositional model, Gaoyou sag, the first member of Dainan Formation

中图分类号:

TE122.2

朱兆群, 林承焰, 张宪国, 李志鹏, 谢晶晶, 魏肃东, 程平. 断陷湖盆早期浅水三角洲沉积——以高邮凹陷永安地区戴一段为例[J]. 吉林大学学报(地球科学版), 2017, 47(3): 659-673.

Zhu Zhaoqun, Lin Chengyan, Zhang Xianguo, Li Zhipeng, Xie Jingjing, Wei Sudong, Cheng Ping. Shallow-Water Delta Deposits in a Rifting Lacustrine Basin During Early Stage:A Case Study of the First Member of Dainan Formation at Yong'an Area, Gaoyou Sag[J]. Journal of Jilin University(Earth Science Edition), 2017, 47(3): 659-673.

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断陷湖盆早期浅水三角洲沉积——以高邮凹陷永安地区戴一段为例

Shallow-Water Delta Deposits in a Rifting Lacustrine Basin During Early Stage:A Case Study of the First Member of Dainan Formation at Yong'an Area, Gaoyou Sag

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