岩性油气藏 ›› 2015, Vol. 27 ›› Issue (5): 74–80.doi: 10.3969/j.issn.1673-8926.2015.05.012

• 油气地质 • 上一篇    下一篇

东海西湖凹陷古近系砂岩侵入体及其地质意义

黄苓渝1,张昌民1,刘江艳1,向小玲2,徐 发3,侯国伟3   

  1.  1. 长江大学 地球科学学院,武汉 430100 ; 2. 中国石油新疆油田分公司 实验检测研究院,新疆 克拉玛依 834000 ; 3. 中海石油(中国)有限公司上海分公司,上海 200030
  • 出版日期:2015-09-26 发布日期:2015-09-26
  • 第一作者:黄苓渝( 1992- ),男,长江大学在读硕士研究生,研究方向为沉积学与石油地质。 地址:( 430100 )湖北省武汉市蔡甸区大学路 111 号长江大学地球科学学院。 E-mail : 200540052@qq.com
  • 基金资助:

    国家“十三五”重大科技专项“深层优势储层形成条件及地质预测技术”(编号: 2016ZX05027-02 )资助

Sand injectites of Paleogene and its geological significance in Xihu Sag, East China Sea

Huang Lingyu1, Zhang Changmin1, Liu Jiangyan1, Xiang Xiaoling2, Xu Fa3, Hou Guowei3   

  1.  1. School of geosciences , Yangtze University , Wuhan 430100 , China ; 2. Research Institute of Experiment and Detection , PetroChina Xinjiang Oilfield Company , Karamay 834000 , Xinjiang , China ; 3. Shanghai Branch of CNOOC Ltd. , Shanghai 200030 , China
  • Online:2015-09-26 Published:2015-09-26

摘要:

在调研国外文献的基础上,通过对中国东海西湖凹陷的区域构造背景及岩心资料进行对比分析,认为在东海西湖凹陷中发育砂岩侵入体。 研究区发育的砂岩侵入体包括大量泥岩碎屑、液化岩脉、泄水构造(碟柱状构造)、液化卷曲变形构造、重荷模与火焰状构造及球-枕状构造。 从沉积学角度对砂岩侵入体的形成机制、岩心特征及其对石油地质的意义等方面进行了简要的讨论。砂岩的侵入能够形成特殊的侵入圈闭,并能极大地提高储层的孔隙度和渗透率,从而改善油气储层的储集物性。 因此,正确认识并深入研究砂岩侵入体对岩性-地层油气藏的勘探开发具有重要意义。

关键词: 深层白云岩, 构造- 岩相古地理, 台地边缘, 勘探方向, 寒武纪, 塔北地区

Abstract:

Based on foreign literature and reports, sand injectites were recognized in the Xihu Sag of East China Sea through an analytical comparison of regional tectonic settings and cores. These sand injectites are characterized by abundant of mudstone debris, liquefied sandstone dyke, water escape structure(dish-and-pillar structure), liquefied fold deformation structure, load cast and flame structure, as well as ball and pillow structure. The formation mechanism, core characteristics and geological significance of sand injectites were simply discussed from the aspect of sedimentology. The intrusion of sand can form intrusive traps and improve the porosity and permeability of reservoirs obviously at the same time, and then improve reservoir properties. So it is very important for lithologic reservoir exploration and development to correctly understand and further research the sand injectites.

Key words: deep dolomite, tectonic-lithofacies palaeogeography, platform margin, exploration directions, Cambrian;northern Tarim Basin

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