西南石油大学学报(自然科学版) ›› 2020, Vol. 42 ›› Issue (5): 48-62.DOI: 10.11885/j.issn.1674-5086.2019.07.18.01

• 地质勘探 • 上一篇    下一篇

南阳凹陷边界断层三维几何学及运动学特征

李智1,2, 张志业1,2, 何登发1, 罗曦2, 熊健2   

  1. 1. 中国地质大学(北京)能源学院, 北京 海淀 100083;
    2. 中国石化河南油田分公司, 河南 南阳 473400
  • 收稿日期:2019-07-18 出版日期:2020-10-10 发布日期:2020-10-10
  • 通讯作者: 何登发,E-mail:hedengfa282@163.net
  • 作者简介:李智,1989年生,男,汉族,河南镇平人,工程师,硕士,主要从事盆地构造解析和石油地质综合研究工作。E-mail:lizhicug@163.com;张志业,1991年生,女,汉族,河南禹州人,工程师,硕士,主要从事地震资料解释和构造地质研究工作。E-mail:zhangzhy169@163.com;何登发,1967年生,男,汉族,四川阆中人,教授,博士,主要从事构造地质学、石油地质学研究工作。E-mail:hedengfa282@163.net;罗曦,1984年生,女,汉族,四川射洪人,高级工程师,硕士,主要从事油气勘探研究工作。E-mail:360355631@qq.com;熊健,1986年生,男,汉族,湖北十堰人,助理研究员,主要从事石油物探地震地质综合解释工作。E-mail:panda_866@163.com
  • 基金资助:
    国家科技重大专项(2017ZX05001-001);国家重点研发计划项目(2017YFC0601405-03)

3D Geometrical and Kinematic Characteristics of the Boundary Fault in Nanyang Depression

LI Zhi1,2, ZHANG Zhiye1,2, HE Dengfa1, LUO Xi2, XIONG Jian2   

  1. 1. School of Energy Resources, China University of Geosciences(Beijing), Haidian, Beijing 100083, China;
    2. Henan Oilfield Company, SINOPEC, Nanyang, Henan 473400, China
  • Received:2019-07-18 Online:2020-10-10 Published:2020-10-10

摘要: 新野断层位于南襄盆地南阳凹陷南部的控凹边界断裂,研究其三维几何学和运动学特征对分析南阳凹陷的形成演化至关重要。以2/3D地震、钻井及测井资料为基础,以正断层相关褶皱理论和构造复原理论为指导,深入剖析新野断层的三维几何学和运动学特征及其对凹陷形成的控制作用。根据断层平面走向,结合倾角和断距变化,将新野断层分为西、中、东3段;空间上认为,新野断层是由多个等倾角面构成的复杂曲面,通过两个垂向轴面和4个横向轴面,将新野断层断面分为11个等倾角区。根据平衡地质剖面复原结果对比,认为新野断层西段、东段形成于晚白垩世,中段形成于始新世大仓房期并逐渐与西段、东段硬连接形成一条断层;断层及其上盘地层旋转程度自西向东逐渐增强;断层反转强度自西向东亦逐渐变大。新野断层西段为"座椅式"正断层,中段由"转折式"正断层转"犁式"正断层,东段为"犁式"正断层。沿断层走向的差异沉降和断面形态差异是南阳凹陷构造特征及形成演化的重要控制因素。

关键词: 南阳凹陷, 新野断层, 几何学特征, 运动学特征, 正断层相关褶皱理论, 构造复原

Abstract: Xinye Fault is a boundary fault in the south of Nanyang Depression, Nanxiang Basin. It is very important to study its 3D geometrical and kinematic characteristics in analyzing the formation and evolution of Nanyang Depression. Based on 2/3D seismic, drilling and logging data, guided by normal fault related fold theory and structural restoration theory, the 3D geometrical and kinematic characteristics of Xinye Fault are analyzed in this paper. According to plane strike, combined with dip angle and fault distance changes, Xinye Fault is divided into three segments, i.e. west, central and east. The fault plane, which could be subdivided into 11 subzones by 2 vertical axial planes and 4 transversal axial planes, is a curved surface consisting of several dip domains. Based on the balanced geologic cross-sections, we established that the west and east segments of this fault developed in the late Cretaceous; the central segment formed in the sedimentary period of Dacangfang Formation in the Eocene, then the three segments linked into one fault. The rotation degree of the fault weakens from east to west. The largest reverse degree appears on the east segment, followed by the central segment and the west segment. The seat-type normal fault form developed in the west segment; the central segment is a turning normal fault instead of listric form and listric in the east segment. The differential subsidence along fault strike and the difference of section shape are important controlling factors for the formation and evolution of Nanyang Depression.

Key words: Nanyang Depression, Xinye Fault, geometrical characteristic, kinematic characteristic, normal fault related fold theory, structural restoration

中图分类号: