塔北地区三叠系层序特征及油气勘探意义

新疆石油地质 ›› 2010, Vol. 31 ›› Issue (5): 477-481.

塔北地区三叠系层序特征及油气勘探意义

时晓章¹, 王建新², 金振奎¹, 王哲¹, 刘安¹, 李鹏¹, 官全胜¹, 杨有星¹

1.中国石油大学资源与信息学院,北京 102249;
2.中国石油新疆油田分公司勘探开发研究院,新疆克拉玛依 834000

收稿日期:2009-11-25 修回日期:2009-12-02 发布日期:2020-10-21
作者简介:时晓章(1975-),男,河北承德人,工程师,在读博士研究生,沉积学和层序地层学(Tel)010-89733703(E-mail)crane_to_south@sina.com.cn.

The Sequence Characteristic of Triassic and Its Significance in Petroleum Exploration in Tabei Area, Tarim Basin

SHI Xiao-zhang¹, WANG Jian-xin², JIN Zhen-kui¹, WANG Zhe¹, LIU An¹, LI Peng¹, GUAN Quan-sheng¹, YANG You-xing¹

1. Faculty of Resource and Information Technology, China University of Petroleum, Beijing 102249, China;
2. Research Institute of Exploration and Development, Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China

Received:2009-11-25 Revised:2009-12-02 Published:2020-10-21

摘要/Abstract

摘要： 以层序地层学、地震沉积学和现代沉积学理论为指导,对塔北地区128 口井的录井资料和测井资料、近2.5×10⁴ km 二维地震剖面和部分三维地震数据体进行了综合分析。在塔北地区三叠系中识别出5 个以不整合面为界面的三级层序,层序Tsq1 和层序Tsq2 相当于下三叠统,层序Tsq3 和层序Tsq4 相当于中三叠统,层序Tsq5 相当于上三叠统。5 个层序均由低位体系域和湖侵体系域组成,低位体系域以发育辫状河、曲流河和三角洲为主,湖侵体系域以发育滨浅湖、半深湖和深湖为主。构造运动、湖平面变化和物源供给是控制三叠系层序形成的主要因素。层序演化及石油地质条件分析表明,低位体系域中发育的复合河道和三角洲分流河道是寻找岩性圈闭的有利目标。

关键词: 塔北地区, 三叠系, 层序特征, 沉积体系, 低位体系域, 岩性圈闭

Abstract: By means of sequence stratigraphy, seismic sedimentology and modern sedimentology theory, the comprehensive analysis of the logging and well logging data from 128 wells, 25 000 km 2-D seismic profile and a part of 3-D seismic data in Tabei area is conducted, and five 3rd-order sequences (Tsq1-Tsq5) bounded by unconformities are identified in the Triassic. Tsq1 and Tsq2 belong to the Lower Triassic, Tsq3 and Tsq4 belong to the Middle Triassic and Tsq5 belongs to the Upper Triassic. All the five sequences are composed of the low-stand system tract dominated by braided river, meandering river and delta and the transgressive system tract dominated by littoralshallow lake, semi-deep lake and deep lake. The tectonic movement, lake level change and sediment supply are the main controlling factors of the Triassic sequences. According to the analysis of sequence evolution and petroleum geology conditions, the complex channel and delta distributary channel developed in low-stand system tract are favorable explorative targets for lithological trap's reservoirs.

Key words: Tabei, Triassic, sequence stratigraphic character, sedimentary system, low-stand system tract, lithological trap

中图分类号:

TE112

时晓章, 王建新, 金振奎, 王哲, 刘安, 李鹏, 官全胜, 杨有星. 塔北地区三叠系层序特征及油气勘探意义[J]. 新疆石油地质, 2010, 31(5): 477-481.

SHI Xiao-zhang, WANG Jian-xin, JIN Zhen-kui, WANG Zhe, LIU An, LI Peng, GUAN Quan-sheng, YANG You-xing. The Sequence Characteristic of Triassic and Its Significance in Petroleum Exploration in Tabei Area, Tarim Basin[J]. Xinjiang Petroleum Geology, 2010, 31(5): 477-481.

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