江汉盆地江陵凹陷复兴场背斜盐构造特征与成因

邱建华; 彭金宁; 唐玮; 潘文蕾; 李风勋; 杨帆

doi:10.11781/sysydz202401054

江汉盆地江陵凹陷复兴场背斜盐构造特征与成因

doi: 10.11781/sysydz202401054

邱建华^{1, 2,},
彭金宁^{1, 2},
唐玮³,
潘文蕾^{1, 2},
李风勋^{1, 2},
杨帆^{1, 2}

1.
中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126
2.
中国石化油气成藏重点实验室, 江苏无锡 214126
3.
中国石化江汉油田分公司勘探开发研究院石油开发所荆州项目部, 湖北荆州 434020

基金项目:

中国石化科技部项目“中扬子地区天然气勘探潜力及突破方向” P0613

详细信息

作者简介:
邱建华(1987-), 男, 博士, 从事构造几何学和运动学研究。E-mail: 648989335@qq.com

中图分类号: TE121.2
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- 文章访问数: 151
- HTML全文浏览量: 65
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- 被引次数: 0
出版历程
- 收稿日期: 2023-02-28
- 修回日期: 2023-12-15
- 刊出日期: 2024-01-28

Characteristics and genetic mechanism of salt structure in Fuxingchang anticline, Jiangling Sag, Jianghan Basin

QIU Jianhua^{1, 2
,},
PENG Jinning^{1, 2},
TANG Wei³,
PAN Wenlei^{1, 2},
LI Fengxun^{1, 2},
YANG Fan^{1, 2}

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2.
SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China
3.
Jingzhou Project Department, Petroleum Development Institute, Exploration and Development Research Institute, Jianghan Oilfield Company, SINOPEC, Jingzhou, Hubei 434020, China

摘要

摘要: 复兴场盐背斜是江汉盆地江陵凹陷重要的含油构造，其构造演化及成因机制认识不清，制约了精细勘探。因此，对复兴场盐背斜构造演化及形成机制的分析，不仅有助于理解盐层在不同应力背景下的流动对背斜形成演化的影响，对理解油气成藏过程也有重要意义。通过对三维地震资料的精细解析，结合关键构造层的平衡恢复技术及生长地层分析技术，研究复兴场背斜的构造特征及成因机制。结果显示，复兴场背斜为一构造特征走向上变化显著，受多期次断层改造、多种变形机制复合而成的盐背斜；背斜初始于早始新世新沟咀组沉积期—晚始新世早期的正断层作用，形成滚筒状褶皱并造成盐层的聚集；在晚始新世晚期—渐新世，沉积地层的差异负载作用驱使盐层自西向东流动，造成构造整体西倾，形成单斜构造，并在渐新世晚期抬升剥蚀；背斜定型于新近纪—第四纪，发生构造反转，演化为一挤压型盐背斜，伴生逆断层和膝折构造。复兴场背斜的形成和演化受区域应力背景、沙市组盐层、东倾正断层及盐下古构造等因素的综合作用。复兴场盐背斜形成的构造圈闭略早于烃源岩的主要排油期，并且在主要排油期，构造处于拗陷阶段，断层活动弱，有利于早期圈闭油气的成藏。
- 构造平衡恢复 /
- 演化特征 /
- 成因机制 /
- 复兴场背斜 /
- 江陵凹陷 /
- 江汉盆地
Abstract: The Fuxingchang salt anticline is an important oil-bearing structure in the Jiangling Sag of the Jianghan Basin, while its structural evolution and formation mechanism are unclear, which restricts the delicate exploration of oil and gas. Therefore, the analysis of structural evolution and formation mechanism of the Fuxingchang salt anticline is not only helpful to understand the influence of salt bed flow under different stress backgrounds on the formation and evolution of the anticline, but also important to understand the process of petroleum accumulation. The structural characteristics and genetic mechanism of Fuxingchang anticline were studied by analyzing 3D seismic data and combining with the techniques of balance restoration of key structural layers and growth strata analysis. The results show that the Fuxingchang anticline is a salt anticline with significant structural features that vary along strike, resulting from multiple stages of fault reconstruction and complex deformation mechanisms. The anticline was initially formed during normal faulting in the sedimentary period from Early Eocene Xingouzui Formation to the early period of Late Eocene, which formed roller fold and caused the accumulation of salt layer. From the late period of Late Eocene to Oligocene, the differential loading of sedimentary strata drove salt beds to flow from west to east, resulting in the westward dip of the whole structure and the formation of monoclinal structure, which was uplifted and denudated in the late period of Oligocene. The anticline was finalized from Neogene to Quaternary, and evolved into a compressional salt anticline, associated with reverse faults and kink-band structures. The formation and evolution of Fuxingchang anticline are influenced by the combined effects of regional stress background, salt layer of Shashi Formation, the east-dipping normal faults, sub-salt paleostructures, etc. The structural trap formed by Fuxingchang salt anticline occurred slightly earlier than the main oil expulsion period of source rocks, and during the main oil expulsion period, the structure was in the depression stage, with weak fault activity, which was conducive to the early accumulation of trapped oil and gas.
- balanced restoration technique /
- evolution characteristics /
- formation mechanics /
- Fuxingchang anticline /
- Jiangling Sag /
- Jianghan Basin
注释:

1) 所有作者声明不存在利益冲突。

1) 利益冲突声明/Conflict of Interests

2) 该科研成果主要由邱建华主持。地震解释及构造恢复由邱建华、彭金宁、唐玮、潘文蕾、杨帆完成。手稿由邱建华、唐玮、彭金宁、李风勋起草和修订。所有作者均阅读并同意最终稿件的提交。

2) 作者贡献/Authors’Contributions

HTML全文

图 1 江汉盆地江陵凹陷研究区构造和地层综合柱状图

a.江陵凹陷构造纲要；b.复兴场三维地震数据时间剖面(2 200 ms)构造；c.江陵凹陷地层综合柱状图，修改自文献[9]。
Ⅰ.枝口洼陷；Ⅱ.万城断裂带；Ⅲ.万城洼陷；Ⅳ.荆州背斜带；Ⅴ.弥陀寺次洼；Ⅵ.清水口次洼；Ⅶ.裁缝店洼陷；Ⅷ.资福寺洼陷；Ⅸ.公安隆起带。

Figure 1. Composite structural map and stratigraphic column of study area in Jiangling Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 2 江汉盆地江陵凹陷研究区地震剖面AA’-BB’-CC’-DD’-EE’-FF’构造解释

剖面位置见图 1b。

Figure 2. Seismic interpretation of sections AA’, BB’, CC’, DD’, EE’ and FF’ of study area in Jiangling Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 3 江汉盆地江陵凹陷研究区地震剖面GG’构造解释

剖面位置见图 1b。

Figure 3. Seismic interpretation of section GG' of study area in Jiangling Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 4 过江汉盆地江陵凹陷复兴场背斜典型剖面BB’、CC’、EE’构造平衡恢复

Figure 4. Balanced restoration of typical sections BB’, CC’ and EE’ across Fuxingchang anticline, Jiangling Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

图 5 不同成因机制形成的盐背斜或盐枕构造的特征

修改自文献[32]。

Figure 5. Features of salt anticlines or salt pillows formed by different genetic mechanisms

下载: 全尺寸图片幻灯片

图 6 江汉盆地江陵凹陷复兴场背斜构造成因模式

Figure 6. Structural genetic model of Fuxingchang anticline, Jiangling Sag, Jianghan Basin

下载: 全尺寸图片幻灯片

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