Title

Sequence interface characteristics and spatial and temporal properties of Kongdian Formation of Paleogene in Jiyang Depression

作者

谭先锋蒋艳霞田景春邹国亮李航王伟庆

Authors

Tan Xianfeng Jiang Yanxia Tian Jingchun Zou Guoliang Li Hang Wang Weiqing

单位

重庆科技学院石油与天然气工程学院, 重庆 401331 2. 成都理工大学油气藏地质及开发工程国家重点实验室, 成都 610059 3. 中国石油长庆油田勘探部, 西安 710021 4. 中国石化胜利油田地质科学研究院, 山东东营 257015

Organization

Chongqing University of Science and Technology, Chongqing 401331, China 2. State Key Laboratory for Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, China 3. Exploration Department of Changqing Oil Field, PetroChina, Xi'an, Shaanxi 710021, China 4. Geologic Research Institute of SINOPEC Shengli Oilfield Company, Dongying, Shandong 257015, China

摘要

依据地震、测井、钻井岩心、地球化学等资料，对济阳坳陷古近系孔店组层序界面进行了系统研究。济阳坳陷古近系孔店组层序界面在地震剖面上表现为上超、下超、削蚀、顶超、整一等反射特征；钻井岩心表现为风化壳和岩性岩相转化特征；岩电关系表现为不同类型的岩电突变；地球化学微量元素也表现为突变特征。识别出4个层序界面，分别为一级层序界面TSB1，二级层序界面SSB1，三级层序界面SB1和SB2。TSB1层序界面主要为区域性质的不整合面，反映了盆地的转化形成；SSB1层序界面主要为构造幕式转化面，反映了盆地断陷作用的阶段变化；SB1和SB2为气候转化面，反映了气候因素引起的旋回变化。层序界面对盆地形成机制、气候变化、幕式断裂活动等具有指示意义。

Abstract

Based on seismic, logging, drilling cores and geochemical data, the sequence boundaries of the Kongdian Formation of Paleogene in the Jiyang Depression were systematically studied. On seismic profiles, the boundaries were featured by onlap, downlap, truncation, toplap and concordance. The drilling cores showed weathering crust and lithology-lithofacies transformation characteristics. The rock-electricity relation indicated different types of mutations. The trace elements also showed mutation characteristics. Four sequence boundaries were identified, including the 1st-order sequence interface TSB1, the 2nd-order sequence interface SSB1 and the 3rd-order sequence interfaces SB1 and SB2. As regional unconformity, the sequence interface TSB1 reflected basin transformation. The sequence interface SSB1 was constructed ceremony conversion surface and showed basin rift stage. The sequence interfaces SB1 and SB2 were climate transformation surfaces and showed the cyclic changes in climate factors. The sequence boundaries were significant for the studies of basin formation, climate change and screen fracture activity.

关键词：

层序界面; 时空属性; 孔店组; 古近系; 济阳坳陷; 渤海湾盆地;

Keywords:

sequence boundary; spatial and temporal property; Kongdian Formation; Paleogene; Jiyang Depression; Bohai Bay Basin;

基金项目

国家自然科学基金项目（41202043）；重庆市自然科学基金（cstc2012jjA90007）和中国石化重点科技攻关项目“济阳坳陷深层（沙四—孔店组）构造演化与岩相古地理研究”联合资助。

DOI

https://doi.org/10.11781/sysydz201402136

济阳坳陷古近系孔店组层序界面特征及时空属性