塔中凸起张扭走滑断裂带分段构造特征及生长机制
Segmented Structural Characteristics and Growth Mechanism of Transtensional Strike-Slip Fault Zone in Tazhong Uplift
柏秉辰 1邬光辉 1马兵山 1赵星星 2唐浩 1沈春光 3王旭鹏1
作者信息
- 1. 西南石油大学 地球科学与技术学院,成都 610500
- 2. 中国石油 塔里木油田分公司 油气田产能建设事业部,新疆 库尔勒 841000;中国石油天然气集团有限公司 超深层复杂油气藏勘探开发技术研发中心,新疆库尔勒 841000;新疆维吾尔自治区超深层复杂油气藏勘探开发工程研究中心,新疆 库尔勒 841000
- 3. 中国石油 塔里木油田分公司 勘探开发研究院,新疆 库尔勒 841000;中国石油天然气集团有限公司 超深层复杂油气藏勘探开发技术研发中心,新疆库尔勒 841000;新疆维吾尔自治区超深层复杂油气藏勘探开发工程研究中心,新疆 库尔勒 841000
- 折叠
摘要
塔里木盆地奥陶系碳酸盐岩发育斜向挤压背景下的压扭走滑断裂,但塔中凸起发现了一系列张扭走滑断裂,并对油气富集具有重要的控制作用.基于塔中凸起西部地区三维地震资料,结合相干、曲率等属性,统计走滑断裂运动参数,运用走滑断裂构造解析方法,优选塔中凸起FⅡ21走滑断裂带开展走滑断裂分段建模研究,并探讨其生长机制.结果表明,FⅡ21走滑断裂带具有平面分段、垂向分层特征,奥陶系碳酸盐岩顶面发育线状构造、斜列构造、马尾构造、翼尾构造、辫状构造和叠覆构造.走滑断裂构造高差分布特征揭示了走滑断裂带的分段生长与尾端扩张生长机制,该断裂带为调节走滑断裂带两侧反向收缩变形的变换断裂,经历雁列断裂阶段、生长连接阶段及再激活雁列断裂阶段的演化过程.
Abstract
In the Tarim basin,transpressional strike-slip faults are developed under oblique compression in the Ordovician carbonate rocks,but a series of transtensional strike-slip faults have been discovered in the Tazhong uplift,significantly controlling the hydrocarbon accumu-lation.Using the 3D seismic data from the western Tazhong uplift,as well as the attributes such as coherence and curvature,the kinematic parameters of the strike-slip faults were statistically analyzed.Through structural analysis of the strike-slip faults,the FⅡ21 strike-slip fault zone in the Tazhong uplift was optimally selected for segmented modeling,and its growth mechanism was investigated.The results show that the FⅡ21 strike-slip fault zone is segmented horizontally and stratified vertically.Various structural forms such as linear,en echelon,horsetail,wingtip,braided,and overlapping structures are found at the top of the Ordovician carbonates.The characteristics of altitude dif-ferences of the fault zone reveal segmentation and tail-end expansion as the growth mechanisms,elucidating its role as a transform fault that regulates the reverse contraction deformation on either side of the strike-slip fault zone,and clarifying its evolution process including stages of en echelon fracturing,growth and linkage,and reactivation.
关键词
塔里木盆地/塔中凸起/走滑断裂带/构造特征/断层分段/构造建模/生长机制Key words
Tarim basin/Tazhong uplift/strike-slip fault zone/structural feature/segmentation/modeling/growth mechanism引用本文复制引用
基金项目
四川省自然科学基金青年基金(24NSFSC6445)
出版年
2024
NETL
NSTL
万方数据