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F_(Ⅱ)21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,F_(Ⅱ)21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。
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 accumulation.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 F_(Ⅱ)21 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 F_(Ⅱ)21 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 differences 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.
作者
柏秉辰
邬光辉
马兵山
赵星星
唐浩
沈春光
王旭鹏
BAI Bingchen;WU Guanghui;MA Bingshan;ZHAO Xingxing;TANG Hao;SHEN Chunguang;WANG Xupeng(School of Geosciences and Technology,Southwest Petroleum University,Chengdu,Sichuan 610500,China;Petro China Tarim Oilfield Company,Oil and Gas Field Productivity Construction Division,Korla,Xinjiang 841000,China;Petro China Tarim Oilfield Company,Research Institute of Exploration and Development,Korla,Xinjiang 841000,China;R&D Center for Ultra-Deep Complex Reservior Exploration and Development,CNPC,Korla,Xinjiang,841000,China;Xinjiang Engineering Research Center for Ultra-deep Complex Reservoir Exploration and Development,Korla,Xinjiang 841000,China)
出处
《新疆石油地质》
CAS
CSCD
北大核心
2024年第4期409-416,共8页
Xinjiang Petroleum Geology
基金
四川省自然科学基金青年基金(24NSFSC6445)。
