塔中隆起西北部中奥陶统一间房组地层识别对比及地质意义

doi:10.7623/syxb201706002

石油学报 ›› 2017, Vol. 38 ›› Issue (6): 622-635.DOI: 10.7623/syxb201706002

塔中隆起西北部中奥陶统一间房组地层识别对比及地质意义

张恒^1,2, 蔡忠贤^1,2, 漆立新³, 云露³, 唐鹏^1,2, 何君毅^1,2

1. 中国地质大学资源学院湖北武汉 430074;
2. 中国地质大学构造与油气资源教育部重点实验室湖北武汉 430074;
3. 中国石油化工股份有限公司西北油田分公司新疆乌鲁木齐 830011

收稿日期:2017-01-24 修回日期:2017-04-23 出版日期:2017-06-25 发布日期:2017-07-08
通讯作者: 蔡忠贤,男,1963年8月生,1985年获武汉地质学院学士学位,1999年获中国地质大学(北京)博士学位,现为中国地质大学(武汉)资源学院石油工程系教授,主要从事碳酸盐岩储层地质学研究。Email:zxcai@cug.edu.cn
作者简介:张恒,男,1988年11月生,2011年获得中国地质大学(武汉)学士学位,2016年获得中国地质大学(武汉)博士学位。现为中国地质大学(武汉)博士后,主要从事岩溶地质学、碳酸盐岩储层地质学和油藏描述研究。Email:cughzhang@163.com
基金资助:
国家重点基础研究发展计划（973）项目“塔里木盆地构造差异演化与下古生界油气成藏过程”（2012CB214804）和构造与油气资源教育部重点实验室开放基金课题（TPR-2014-19）资助。

Stratigraphic recognition and correlation of Middle Ordovician Yijianfang Formation in northwestern Tazhong uplift and its geological significances

Zhang Heng^1,2, Cai Zhongxian^1,2, Qi Lixin³, Yun Lu³, Tang Peng^1,2, He Junyi^1,2

1. Faculty of Earth Resources, China University of Geosciences, Hubei Wuhan 430074, China;
2. Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Hubei Wuhan 430074, China;
3. Sinopec Northwest Oilfield Company, Xinjiang Urumqi 830011, China

Received:2017-01-24 Revised:2017-04-23 Online:2017-06-25 Published:2017-07-08

摘要/Abstract

摘要：

塔中隆起西北部中古15井区奥陶系的油气突破促进了对中奥陶统一间房组的新认识，因此该套地层在塔中隆起区—斜坡区的分布特征备受地质勘探者的关注。基于旋回地层学、生物地层学、同位素地层学、层序地层学理论与技术，结合地层岩电特征、沉积特征、暴露溶蚀特征，从不同角度论证了塔中隆起西北部一间房组的存在；进而，通过钻井地层对比，阐述了一间房组的空间分布；并基于精细地震层位追踪与解释，厘定了一间房组尖灭线的范围。认为INPEFA测井旋回分析和小波分析技术是识别塔中隆起西北部一间房组地层界面的有效手段；一间房组主要分布在顺西地区和中古15井区，厚度为110~190 m，自北向南依次减薄并上倾尖灭。一间房组及其尖灭线的厘定对于区域性地层分布、中—下奥陶统构造演化过程、岩溶储层分区评价等方面的认识具有重要意义。

关键词: 旋回地层学, 地层识别, 地层对比, 地层分布, 一间房组, 塔中隆起

Abstract:

Because of the breakthrough in Ordovician hydrocarbon exploitation in well block ZG15, northwestern Tazhong uplift, the new understanding of the Middle Ordovician Yijianfang Formation has been promoted. As a result, widespread attentions from geological prospectors are paid to the distribution characteristics of the Ordovician strata in Tazhong uplift zone and slope zone. Based on the techniques and theories of cyclostratigraphy, biostratigraphy, isotopic stratigraphy and sequence stratigraphy, the existence of Yijianfang Formation in northwestern Tazhong uplift was demonstrated from various aspects in combination with lithologic and electronic features, sedimentary characteristics and exposed karstification symbols of Ordovician strata. Furthermore, the spatial distribution of Yijianfang Formation was displayed by drilling stratigraphic correlation. Moreover, the range of pinchout line in the Yijianfang Formation was determined according to the precise tracking and interpretation of seismic horizons. It is believed that INPEFA logging cycle and wavelet analysis techniques are effective methods for identifying the stratigraphic interfaces of Yijianfang Formation in northwestern Tazhong uplift. Yijianfang Formation is mainly distributed in Shunxi area and well block ZG15, which has a thickness of 110-190m reduced from north to south till upward pinchout. The delineation of Yijianfang Formation and its pinchout line has critical geological significances to the understanding of regional stratigraphic distribution, the Middle-Lower Ordovician tectonic evolution process and the zoning evaluation of karst reservoirs.

Key words: cyclostratigraphy, stratigraphic recognition, stratigraphic correlation, strata distribution, Yijianfang Formation, Tazhong uplift

中图分类号:

TE122.14

张恒, 蔡忠贤, 漆立新, 云露, 唐鹏, 何君毅. 塔中隆起西北部中奥陶统一间房组地层识别对比及地质意义[J]. 石油学报, 2017, 38(6): 622-635.

Zhang Heng, Cai Zhongxian, Qi Lixin, Yun Lu, Tang Peng, He Junyi. Stratigraphic recognition and correlation of Middle Ordovician Yijianfang Formation in northwestern Tazhong uplift and its geological significances[J]. Acta Petrolei Sinica, 2017, 38(6): 622-635.

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塔中隆起西北部中奥陶统一间房组地层识别对比及地质意义

Stratigraphic recognition and correlation of Middle Ordovician Yijianfang Formation in northwestern Tazhong uplift and its geological significances

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