基于全岩心CT的遗迹化石识别及沉积环境分析:以加拿大麦凯&#x02162;油砂区块为例<sup>&#x0002A;</sup>

doi:10.7605/gdlxb.2018.04.051

古地理学报 ›› 2018, Vol. 20 ›› Issue (4): 703-712. doi: 10.7605/gdlxb.2018.04.051

• 新技术与新方法 • 上一篇

基于全岩心CT的遗迹化石识别及沉积环境分析:以加拿大麦凯Ⅲ油砂区块为例^*

陈浩¹, 黄继新¹, 常广发², 武军昌¹, 孙天建¹

1 中国石油勘探开发研究院,北京 100083;
2 中国石油加拿大公司,卡尔加里 AB T2P 1V8

收稿日期:2018-02-01 修回日期:2018-02-27 出版日期:2018-08-01 发布日期:2018-07-31
作者简介:陈浩,男,1991年生,博士研究生,主要从事开发地质研究。E-mail: chen19613@petrochina.com.cn。
基金资助:
*国家科技重大专项(编号: 2016ZX05031),国家自然学科基金(编号: 41472119)联合资助

Ichnology identification and sedimentary enviorment analysis based on CT scanning: A case study from Mackay Ⅲ oil sands,Canada

Chen Hao¹, Huang Ji-Xin¹, Chang Guang-Fa², Wu Jun-Chang¹, Sun Tian-Jian¹

1 Research Institute of Petroleum Exploitation and Development,PetroChina, Beijing 100083;
2 PetroChina Canada,Calgary AB T2P 1V8

Received:2018-02-01 Revised:2018-02-27 Online:2018-08-01 Published:2018-07-31
About author:Chen Hao,born in 1991,is a Ph.D. candidate. He is engaged in research of development geology. E-mail: chen19613@petrochina.com.cn.
Supported by:
Co-funded by the National Science and Technology Major Project of China(No.2016ZX05031)and the National Natural Science Foundation of China(No.41472119)

摘要/Abstract

摘要： 遗迹化石研究对于沉积环境分析具有重要意义。以加拿大麦凯Ⅲ油砂区块下白垩统McMurray组为研究对象,利用高分辨率岩心照片和全岩心CT扫描资料,在确认研究目的层遗迹化石发育属种、单体规模、组合类型及指相特征的基础上,分析了主力油砂层的沉积环境。结果表明: 目的层发育遗迹化石10属12种,包括Asterosoma isp.,Chondrites isp.,Diplocraterion isp.,Ophiomorpha nodosa,Palaeophycus tubularis,Planolites beverleyensis,Planolites isp.,Rosselia isp.,Skolithos verticalis,Skolithos isp.,Teichichnus isp.,Thalassinoides isp.;根据遗迹化石产状与围岩沉积特征,建立了Ophiomorpha-Skolithos、Asterosoma-Chondrites-Rosselia和Teichichnus-Rosselia￣Thalassinoides共3种遗迹组合,分别代表潮间带、潮下带以及浅海陆棚沉积环境中的遗迹化石组成特征。研究区油砂层优质储油砂体为潮间带沉积产物,潮汐砂坝、潮成砂脊为沥青的主要储集体。本研究既体现了全岩心CT资料在遗迹化石研究中的应用,也为潮坪沉积环境分析提供了有益参考。

关键词: 加拿大, 油砂, 下白垩统, CT扫描, 遗迹化石

Abstract: Ichnology provides a basis for identification and analysis of depositional environment. Taking the Lower Cretaceous McMurray Formation,Mackay Ⅲ oil sands,Canada as an example,the sedimentary environments of the reservoir were studied with respect to trace fossils' species,size,associations,and facies indicators by high-resolution core photos and CT data. Results indicate that there are 12 species of ten genera in the Middle and Upper McMurray Formation,including Asterosoma isp.,Chondrites isp.,Diplocraterion isp.,Ophiomorpha nodosa,Palaeophycus tubularis,Planolites beverleyensis,Planolites isp.,Rosselia isp.,Skolithos verticalis,Skolithos isp.,Teichichnus isp.,and Thalassinoides isp.. According to the features of these fossils and surrounding lithology,three combinations, including Ophiomorpha-Skolithos,Asterosoma-Chondrites-Rosselia and Teichichnus-Rosselia-Thalassinoides, are established,representing intertidal,subtidal and shallow-marine environments respectively. Sand bodies in reservoir were deposited in the intertidal setting,being the main accumulation of hydrocarbon. This study not only reflects the superiority of CT data,but also provides a reference for recognizing the tidal flat environments.

Key words: Canada, oil sands, Lower Cretaceous, CT scanning, trace fossils

中图分类号:

Q911.28

陈浩, 黄继新, 常广发, 武军昌, 孙天建. 基于全岩心CT的遗迹化石识别及沉积环境分析:以加拿大麦凯Ⅲ油砂区块为例^*[J]. 古地理学报, 2018, 20(4): 703-712.

Chen Hao, Huang Ji-Xin, Chang Guang-Fa, Wu Jun-Chang, Sun Tian-Jian. Ichnology identification and sedimentary enviorment analysis based on CT scanning: A case study from Mackay Ⅲ oil sands,Canada[J]. JOPC, 2018, 20(4): 703-712.

http://www.gdlxb.cn/CN/Y2018/V20/I4/703

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基于全岩心CT的遗迹化石识别及沉积环境分析:以加拿大麦凯Ⅲ油砂区块为例^*

Ichnology identification and sedimentary enviorment analysis based on CT scanning: A case study from Mackay Ⅲ oil sands,Canada

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基于全岩心CT的遗迹化石识别及沉积环境分析:以加拿大麦凯Ⅲ油砂区块为例*

Ichnology identification and sedimentary enviorment analysis based on CT scanning: A case study from Mackay Ⅲ oil sands,Canada

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基于全岩心CT的遗迹化石识别及沉积环境分析:以加拿大麦凯Ⅲ油砂区块为例^*