塔里木盆地二八台地区走滑断裂体系研究

doi:10.11720/wtyht.2024.0015

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摘要

油气勘探中断层的分布特征一直是地震资料解释的难点和重点,其中走滑断裂体系中的断裂组合最为复杂。塔里木盆地二八台地区发育复杂的轮台走滑断裂体系,为明确其断裂构造特征,采用倾角+方位角扫描+构造导向滤波处理手段来降低背景噪声,综合利用相干体、蚂蚁体、最大似然体等多种属性形成多级嵌套技术,识别并统计了二八台41条断裂的走向、倾向、倾角、断距等几何学发育特征,明确了走滑断裂体系内部复杂断裂结构组合关系;认识到二八台地区发育近EW向为主的主走滑断裂带和NE走向的次级伴生断裂带,为左旋扭动产生的张破裂,表现为右阶式雁列正断层系。研究结果对二八台构造油气藏的评价有借鉴意义。

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	张珈畅
	李涛
	梁宏刚
	费娥
	孙致远
	岳彤

关键词 ：走滑断裂, 地震解释, 构造导向滤波, 塔里木盆地, 二八台地区

Abstract：

In structural confirmation for oil and gas exploration, ascertaining the distributions of faults remains a challenge and priority in seismic data interpretation. The most complex fault combinations can be observed in strike-slip fault systems. This study investigated the Erbatai area that hosts a complex Luntai strike-slip fault system in the Tarim Basin. First, the background noise was reduced using the dip angle plus azimuth scanning and the structure-oriented filtering. Then, a multi-level nesting technology was developed by integrating attributes like coherence cube, ant-tracking attribute, and maximum likelihood. Using the technology, this study identified and statistically analyzed 41 faults in the Erbatai area for their geometric development characteristics, including strike, dip, dip angle, and fault throw. Furthermore, this study determined the complex fault combinations within the strike-slip fault system. The findings indicate that the Erbatai area develops a dominant nearly EW-trending strike-slip fault zone and a NE-trending secondary fault zone. These faults are extensional fractures caused by left-lateral torsion, manifested as right-stepping en echelon normal faults. Overall, this study can be referenced for assessing structural hydrocarbon reservoirs in the Erbatai area.

Key words： strike-slip fault seismic interpretation structure-oriented filtering Tarim Basin Erbatai area

收稿日期: 2024-01-15 修回日期: 2024-05-27 出版日期: 2024-12-20

ZTFLH:

P631.4

基金资助:中国石化西北油田分公司勘探开发研究院项目(KY2021-S-018)

通讯作者: 李涛(1982-),男,博士,副教授,从事构造地质学方向的研究工作。Email:ltm817@yangtzeu.edu.cn

引用本文:

张珈畅, 李涛, 梁宏刚, 费娥, 孙致远, 岳彤. 塔里木盆地二八台地区走滑断裂体系研究[J]. 物探与化探, 2024, 48(6): 1588-1598.
ZHANG Jia-Chang, LI Tao, LIANG Hong-Gang, FEI E, SUN Zhi-Yuan, YUE Tong. Strike-slip fault system in the Erbatai area, Tarim Basin. Geophysical and Geochemical Exploration, 2024, 48(6): 1588-1598.

链接本文:

https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2024.0015 或 https://www.wutanyuhuatan.com/CN/Y2024/V48/I6/1588

Fig.1 走滑断裂体系下的地震精细解释技术流程

Fig.2 二八台地区区域位置

Fig.3 二八台地区原始地震资料(a)及处理后的地震资料(b)

Fig.4 二八台地区Inline1872测线地震剖面

Fig.5 二八台地区Inline1872测线三种苏维依组顶界沿层属性对比

Fig.6 多级嵌套断层解释结果

Fig.7 二八台地区苏维依组顶界沿层相干体属性识别

Fig.8 二八台苏维依组顶界沿层蚂蚁体地震属性识别

Fig.9 二八台地区Inline1857测线苏维依组顶界沿层最大似然体地震属性识别

Fig.10 二八台地区三维立体效果对比

Fig.11 二八台断裂分级示意

Fig.12 二八台断裂演化模式示意

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