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现代地质 ›› 2019, Vol. 33 ›› Issue (04): 802-810.DOI: 10.19657/j.geoscience.1000-8527.2019.04.11

• 石油地质学 • 上一篇    下一篇

渤海海域前新生代基底特征及其油气勘探意义

吴庆勋(), 高坤顺, 吴昊明, 郭颖, 陈心路   

  1. 中海石油(中国)有限公司 天津分公司, 天津 300459
  • 出版日期:2019-08-20 发布日期:2019-09-05
  • 作者简介:吴庆勋,男,工程师,硕士,1986年出生,矿产普查与勘探专业,主要从事油气勘探与综合评价工作。Email: wuqx@cnooc.com.cn
  • 基金资助:
    “十三五”国家科技重大专项“渤海海域勘探新领域及关键技术研究”(2016ZX05024-003)

Characteristics of Pre-Cenozoic Basement in Bohai Sea and its Significance in Oil and Gas Exploration

WU Qingxun(), GAO Kunshun, WU Haoming, GUO Ying, CHEN Xinlu   

  1. Tianjin Branch of CNOOC (China) Co. Ltd., Tianjin 300459
  • Online:2019-08-20 Published:2019-09-05

摘要:

基于渤海钻井资料和三维地震资料,梳理了渤海海域前新生代基底岩性、地层、结构、构造特征。将渤海基底划分为前寒武系、古生界、中生界三个构造层,论述了各个构造层残余地层分布特征,并将基底结构分为三种类型,单层型、双层型、三层型。基底构造演化表现为“垂直升降→强烈挤压→局部伸展→强烈伸展反转→整体隆升→‘伸展+走滑’复合改造”6大阶段。结合薄片及物性资料探索了基岩储层发育规律,单层型前寒武系变质岩、双层型顶部的碳酸盐岩或火山岩、三层型顶部中生界火山岩为有利的勘探目标。围绕在富烃凹陷周边的潜山,在岩性和供油窗口耦合的情况下,具有良好的勘探前景。

关键词: 渤海海域, 基底结构, 潜山, 前新生界, 油气勘探意义

Abstract:

Based on the Bohai drilling and 3D seismic data, lithology, stratigraphy and structural features of the Pre-Cenozoic basement in the Bohai sea have been integrated. The Bohai sea basement is divided into three structural layers: Pre-Cambrian, Paleozoic and Mesozoic. Distribution characteristics of the residual layers in each structural layer are discussed, and the basement structure is divided into three types: single, double and three level. Tectonic evolution of the basement comprises six stages: vertical rise and fall, strong extrusion, local extension, strong extension and inversion, overall uplift, stretch and strike-slip compound transformation. Combining the rock sheet and material data, the development regularity of the basement reservoir is explored. Precambrian metamorphic rocks of the single-layer type, carbonate or volcanic rocks at the top of the double-layer type, and Mesozoic volcanic rocks at the top of the three-layer type are favorable exploration targets. Buried hill around the hydrocarbon rich sag has a good exploration potential under the coupling of lithology and oil-supply window.

Key words: Bohai sea, basement structure, buried hill, Pre-Cenozoic, oil and gas exploration

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