渤中凹陷北部中生界顶面断层破碎带量化研究

doi:10.19657/j.geoscience.1000-8527.2022.202

现代地质 ›› 2022, Vol. 36 ›› Issue (04): 1035-1042.DOI: 10.19657/j.geoscience.1000-8527.2022.202

渤中凹陷北部中生界顶面断层破碎带量化研究

陈宇航¹^,²^,³(), 张新涛⁴, 余一欣¹^,²(), 杨帆¹^,², 柳永军⁵, 张震⁵, 丁康⁶

1.中国石油大学(北京) 油气资源与探测国家重点实验室, 北京 102249
2.中国石油大学(北京) 地球科学学院, 北京 102249
3.中国石油长庆油田分公司, 陕西西安 710018
4.中海石油(中国) 有限公司勘探部, 北京 100010
5.中海石油(中国) 有限公司天津分公司, 天津 300459
6.中国石油西南油气田公司勘探事业部, 四川成都 610041

收稿日期:2021-12-05 修回日期:2022-02-11 出版日期:2022-08-10 发布日期:2022-09-09
通讯作者: 余一欣
作者简介:余一欣,男,博士,副教授,1977年出生,石油地质学专业,主要从事含油气盆地构造地质学教学、科研工作。Email: yuxin0707@163.com。
陈宇航,男,硕士,1996年出生,构造地质学专业,从事油区构造解析研究。Email: chenyuhang1022@126.com。
基金资助:
国家自然科学基金项目(42072149);国家重点研发计划项目(2017YFC0603105)

Quantitative Study on the Uppermost Mesozoic Fault Damage Zones in Northern Bozhong Sag

CHEN Yuhang¹^,²^,³(), ZHANG Xintao⁴, YU Yixin¹^,²(), YANG Fan¹^,², LIU Yongjun⁵, ZHANG Zhen⁵, DING Kang⁶

1. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum, Beijing 102249, China
2. College of Geosciences, China University of Petroleum, Beijing 102249, China
3. Changqing Oilfield Company, PetroChina, Xi'an, Shaanxi 710018, China
4. Exploration Department of CNOOC Ltd., Beijing 100010, China
5. CNOOC Tianjin Branch, Tianjin 300459, China
6. Exploration Department, PetroChina Southwest Oil & Gasfield Company, Chengdu, Sichuan 610041, China

Received:2021-12-05 Revised:2022-02-11 Online:2022-08-10 Published:2022-09-09
Contact: YU Yixin

摘要/Abstract

摘要：

渤中凹陷是渤海海域最大的生烃凹陷,环渤中凹陷北部潜山带是目前重要的油气勘探区带。渤中凹陷北部中生界以火成岩为主,裂缝对火成岩储层的形成具有重要影响。利用地震方差属性值量化断层破碎带,建立断层破碎带宽度与断层斜距之间的数量关系,构建方差属性值等值线图的方式,结合前人研究的图版和薄片资料,对渤中凹陷北部中生界顶面断层破碎带进行量化、验证和分析。结果显示:研究区内的断层均有多个断层核,断层系统复杂,断层破碎带宽度由几百米至几千米不等,断层破碎带对中生界火山岩影响作用显著;断层破碎带的影响程度与距断层的距离呈负相关,即距离断层越远,影响程度越弱,方差属性值越小;利用地震方差属性值量化断层破碎带的结果与相关研究的图版规律、薄片资料的显示结果契合度高,对断层破碎带的量化研究具有较高的可行性。

关键词: 渤中凹陷北部, 中生界火山岩, 潜山, 断层破碎带, 地震属性

Abstract:

The Bozhong sag is the largest hydrocarbon-generating sag in the Bohai Sea, and the buried hill belt in the northern part of the sag is an important exploration target. The local Mesozoic geology is mainly dominated by igneous rocks, and fractures are important to the formation of igneous reservoirs. Here, we quantified the fault damage zones by using the seismic variance attribute value, established the quantitative relationship between the width and the fault slant distance, and established a contour map of the variance attribute value. Combined with published chart and thin section data, the fault damage zones at the uppermost Mesozoic sequence in the northern Bozhong sag are quantified, verified and analyzed. The results show that the local faults have multiple fault cores, and that the fault systems are complex. The width of the fault damage zones varies from several hundred meters to several kilometers. The fault damage zones have obvious influence on the Mesozoic volcanic rocks, and the degree of influence correlates negatively with the distance from the fault. The quantitative results of fault damage zones based on seismic variance attribute value is in good agreement with the layout pattern of related research and the thin section analysis results in the study area, which demonstrate high feasibility for the quantitative study of fault damage zones.

Key words: northern Bozhong sag, Mesozoic igneous rock, buried hill, fault damage zones, seismic attributes

中图分类号:

TE121.2

陈宇航, 张新涛, 余一欣, 杨帆, 柳永军, 张震, 丁康. 渤中凹陷北部中生界顶面断层破碎带量化研究[J]. 现代地质, 2022, 36(04): 1035-1042.

CHEN Yuhang, ZHANG Xintao, YU Yixin, YANG Fan, LIU Yongjun, ZHANG Zhen, DING Kang. Quantitative Study on the Uppermost Mesozoic Fault Damage Zones in Northern Bozhong Sag[J]. Geoscience, 2022, 36(04): 1035-1042.

图/表 11

图1 断层破碎带示意图[7]

Fig.1 Schematic diagrams of fault damage zones

图2 研究区断层分布图及典型地震剖面

Fig.2 Fault distribution map and typical seismic profile in the study area

图3 断层破碎带量化方法示意图[13]

Fig.3 Schematic diagrams of quantitative method for fault damage zones

图4 渤中凹陷北部中生界顶面断层分布图及方差属性图

Fig.4 Diagrams of fault distribution and variance attribute of Mesozoic top surface in northern Bozhong sag

表1 研究区不同测线断距与断层破碎带宽度数据表

Table 1 Data of fault distance and width of fault damage zones of different survey lines in study area

测线号	断距/ km	断层破碎带宽度/km	测线号	断距/ km	断层破碎带宽度/km
xline3079	0.88	0.65	inline5061	0.89	0.90
xline3070	0.85	0.65	inline5071	0.90	1.14
xline3059	0.81	0.85	inline5259	1.11	1.41
inline5451	1.44	1.98	inline5249	1.11	1.20
inline5471	1.46	2.20	inline5239	1.12	1.28
inline5411	1.47	2.40	inline5228	1.17	1.19
inline5051	0.90	0.79

图5 不同测线地震方差属性值分布特征图

Fig.5 Distribution characteristics of seismic variance attribute value of different survey lines

图6 断距与断层破碎带宽度数量关系耦合曲线图

Fig.6 Coupling curve of quantitative relationship between fault displacement and fault damage zones width

图7 渤中凹陷北部中生界顶面断层破碎带平面分布图

Fig.7 Plane distribution of uppermost Mesozoic fault damage zones in northern Bozhong sag

图8 断距与断层破碎带宽度变化规律[9]

Fig.8 Variation of fault displacement and fault damage zones width

图9 渤中凹陷北部中生界裂缝发育特征

Fig.9 Mesozoic fracture development characteristics in the northernBozhong sag

图10 渤中凹陷北部中生界顶面方差属性值等值线图

Fig.10 Contour map of variance attribute value of the uppermost Mesozoic surface in the northern Bozhong sag

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渤中凹陷北部中生界顶面断层破碎带量化研究

Quantitative Study on the Uppermost Mesozoic Fault Damage Zones in Northern Bozhong Sag

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