西南石油大学学报(自然科学版) ›› 2025, Vol. 47 ›› Issue (1): 95-106.DOI: 10.11885/j.issn.1674-5086.2024.08.28.05

• 深海油气勘探与开发地质专刊 • 上一篇    下一篇

深海水道在盐底辟型微盆地中的发育演化

穆柏雨1, 赵晓明1,2, 齐昆1, 刘飞1, 李发有3   

  1. 1. 西南石油大学地球科学与技术学院, 四川 成都 610500;
    2. 天然气地质四川省重点实验室, 四川 成都 610500;
    3. 中国石化石油勘探开发研究院, 北京 昌平 102206
  • 收稿日期:2024-08-28 发布日期:2025-03-12
  • 通讯作者: 赵晓明,E-mail:zhxim98@163.com
  • 作者简介:穆柏雨,2001年生,男,汉族,辽宁凌海人,硕士,主要从事油气田开发地质学、深水沉积学等方面的研究工作。E-mail:3331961644@qq.com
    赵晓明,1982年生,男,汉族,山东安丘人,教授,博士研究生导师,主要从事油气田开发地质学、深水沉积学、非常规油气地质、二氧化碳封存与利用、人工智能与油气地质等方面的研究工作。E-mail:zhxim98@163.com
    齐昆,1993年生,男,汉族,河北石家庄人,讲师,博士,主要从事油气田开发地质学、深水沉积学方面的研究与教学工作。E-mail:qikun205@163.com
    刘飞,1997年生,男,汉族,四川巴中人,博士研究生,主要从事深水沉积及开发地质方面的研究。E-mail:liuf_e@163.com
    李发有,1980年生,男,汉族,辽宁大连人,高级工程师,硕士,主要从事油气田开发地质方面的研究工作。E-mail:lify.syky@sinopec.com
  • 基金资助:
    四川省自然科学基金杰出青年科学基金(2024NSFJQ0065);四川省国际科技创新合作项目(24GJHZ0465)

Development and Evolution of Deep-sea Channels in Salt Diapir Typed Microbasins

MU Boyu1, ZHAO Xiaoming1,2, QI Kun1, LIU Fei1, LI Fayou3   

  1. 1. School of Geoscience and Technology, Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. Sichuan Key Laboratory of Natural Gas Geology, Chengdu, Sichuan 610500, China;
    3. Petroleum Exploration and Production Research Institute, SINOPEC, Changping, Beijing 102206, China
  • Received:2024-08-28 Published:2025-03-12

摘要: 针对盐底辟型微盆地内深海水道的发育演化特征不明确,阻碍了深海油气勘探开发,增加了深海油气的勘探开发难度等问题。以安哥拉陆缘深水区中新统某盐底辟型微盆地为例,基于三维地震资料,采用RGB三色融合技术,分析了盆地内水道的发育演化特征和演化模式。研究认为,微盆地的构造发育控制着深水水道的发育演化,沿着微盆地短轴方向发育的水道C1、C2和C3主要发育溢出微盆地的模式,而沿着盆地长轴方向发育的水道C4和C5主要发育充填微盆地的模式。水道在微盆地内发生充填还是溢出主要跟盐构造的活动时期与水道形成演化时期的先后关系、水道中重力流的侵蚀能力与盐构造活动速率的相对大小、微盆地的构造发育特征和水道流向与构造走向之间的角度有关。水道C4和C5在重力流的作用下,沿着构造低部位流动,随着可容空间逐渐变大,水道末端逐渐开始朵叶化,形成朵叶沉积。

关键词: 盐底辟型微盆地, 深海水道, 发育演化, 充填与溢出模式, 水道朵叶化

Abstract: The unclear development and evolution characteristics of deep-sea channels in salt diapir typed microbasins hinders the exploration and development of deep-sea oil and gas and increases the difficulty of deep-sea oil and gas exploration and development. To solve such problems we made a case study on a Miocene salt diapir typed microbasin in the deep-water area of the continental margin of Angola, based on 3D seismic data and using RGB color blending technique, and analyzed the development and evolution characteristics and evolution model of channels in the basin. The study shows that the structural development of the microbasin controls the development and evolution of the deep-water channel. The channels C1, C2 and C3 developed along the short axis of the microbasin mainly develop the model of overflowing the microbasin, while channels C4 and C5 developed along the long axis of the basin mainly developed the model of filling microbasins. Whether the channel fills or overflows in the microbasin is mainly related to the relationship between the active period of the salt structure and the formation and evolution of the channel, the relative magnitude of the erosion ability of the gravity flow in the channel to the active rate of the salt structure, the structural development characteristics of the microbasin and the angle between channel flow direction and tectonic trend. The channels C4 and C5 flow along the bottom of the structure under the action of gravity flow. With the increase of the accommodation space, the end of the channel gradually begins to lobe and form leaf deposits.

Key words: salt diapir typed microbasin, deep-sea channel, development and evolution, filling and overflow mode, channel leafing

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