渤海湾盆地辽东湾地区辽西凸起中北段太古宇潜山成储规律及主控因素

郭龙龙; 王峻; 张春光; 陈洪德

doi:10.11781/sysydz202401046

渤海湾盆地辽东湾地区辽西凸起中北段太古宇潜山成储规律及主控因素

doi: 10.11781/sysydz202401046

郭龙龙^{1, 2,},
王峻¹,
张春光¹,
陈洪德¹

1.
成都理工大学沉积地质研究院, 成都 610059
2.
中海石油(中国)有限公司天津分公司, 天津 300452

基金项目:

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

中海石油(中国)有限公司“七年行动计划”重大科技专项“渤海油田上产4000万吨新领域勘探关键技术” CNOOC-KJ135ZDXM36TJ08TJ

详细信息

作者简介:
郭龙龙(1985-), 男, 博士, 工程师, 从事石油地质研究。E-mail: 370224565@qq.com

中图分类号: TE122.2
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- 被引次数: 0
出版历程
- 收稿日期: 2023-11-07
- 修回日期: 2024-01-05
- 刊出日期: 2024-01-28

Reservoir-forming rules and main controlling factors of Archean buried hill reservoir of middle to northern Liaoxi Uplift in Liaodong Bay area in Bohai Bay Basin

1.
Institute of Sedimentary Geology, Chengdu University of Technology, Chengdu, Sichuan 610059, China
2.
Tianjin Branch of CNOOC (China) Limited, Tianjin 300452, China

摘要

摘要: 渤海湾盆地是我国潜山油气资源勘探的重点地区之一，为了打开该区太古宇潜山勘探新局面，对辽东湾地区太古宇潜山成储规律及主控因素进行了研究。基于薄片、测井、地震等钻井资料，分析了辽西凸起中北段太古宇潜山岩石学特征、岩石展布特征、储层特征、构造演化和裂缝特征。研究表明，辽东湾地区辽西凸起太古宇潜山由片麻岩类、变质花岗岩类和碎裂岩类等组成，并以片麻岩为主；现今构造呈南高北低特征，北部地层保存相对完好，南部地层上部具剥蚀迹象，岩浆岩比例自北向南逐渐增高。该区太古宇变质岩以裂缝型储层为主，岩石中暗色矿物含量与岩石脆性呈反比关系；构造变形导致裂缝发育，太古宇潜山发育三组构造裂缝，即燕山早期受到NE向强剪切和SN向强挤压的应力方向发育NNE向剪裂缝和SN向张裂缝，喜马拉雅早期受到NW向强伸展和NE向弱剪切的应力方向发育NE向剪裂缝和北东向张裂缝，喜马拉雅晚期受到NE向强剪切和NW向弱伸展的应力方向发育EW向张裂缝及NE向和NW向共轭剪裂缝，区域构造差异活动程度控制了裂缝的有效性；燕山运动是变质岩储层主要造缝期，喜马拉雅期裂缝以方解石充填、半充填为主，后期经溶蚀可构成有效裂缝。
- 主控因素 /
- 储层 /
- 潜山 /
- 太古宇 /
- 辽西凸起 /
- 渤海湾盆地
Abstract: The Bohai Bay Basin is one of the key areas for the exploration of buried hill oil and gas resources in China. In order to create a new prospect for the exploration of the Archaean buried hills in this area, the reservoir-forming laws and main controlling factors of the Archaean buried hill reservoir in the Liaodong Bay area were studied. Based on drilling data such as stratum, logging, and seismic data, this paper classified the lithology and distribution patterns of Archean buried hills in the Liaodong Bay area, and analyzed the dominant reservoir space types and controlling factors. The results show that the Archean buried hills in the Liaodong Bay area are composed of schist, metamorphic granite and cataclastic rocks, with schist being the predominant lithology. The current structure is high in the south and low in the north. The strata are relatively intact in the north, while the upper part of the strata in the south shows evidence of denudation. The proportion of igneous rocks increases gradually from north to south. The metamorphic rocks are dominated by fracture reservoirs. The content of mafic minerals is inversely correlated with the brittleness of rocks. Tectonic deformation led to fracture development. Three sets of structural fractures were developed in the Archean buried hills of the Bohai Bay Basin, i.e., NNE shear fractures and SN tensile fractures were developed in the stress directions of NE strong shear and SN strong compression in the early Yanshanian period, NE shear fractures and NE tensile fractures were developed in the stress directions of NW strong extension and NE weak shear in the early Himalayan period, and EW tensile fractures and NE and NW conjugate shear fractures were developed in the stress directions of NE strong shear and NW weak extension in the late Himalayan period. The degree of regional tectonic activity controlled the effectiveness of the fractures. The Yanshanian movement was the main stage of fracture formation in metamorphic rock reservoirs. During the Himalayan period, fractures were mainly filled and semi-filled with calcite, and effective fractures could be formed through dissolution in the later stage.
- main controlling factor /
- reservoir /
- buried hill /
- Archean /
- Liaoxi Uplift /
- Bohai Bay Basin
注释:

利益冲突声明/Conflict of Interests

所有作者声明不存在利益冲突。

All authors disclose no relevant conflict of interests.

作者贡献/Authors’Contributions

陈洪德、王峻提出论文总体构思，张春光负责引言编写；郭龙龙负责其余部分编写及统稿；郭龙龙、张春光负责图件编绘。所有作者均阅读并同意最终稿件的提交。

CHEN Hongde and WANG Jun proposed the overall concept of the paper, while ZHANG Chunguang was responsible for writing the introduction. GUO Longlong was responsible for the preparation and compilation of the remain-ing parts. GUO Longlong and ZHANG Chunguang were responsible for the compilation and drafting of the drawings. All authors have read and agree to the submission of the final manuscript.

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图 1 渤海湾盆地辽东湾地区辽西凸起位置及储层综合柱状图

Figure 1. Location map and reservoir comprehensive histogram of Liaoxi Uplift in Liaodong Bay area, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 2 渤海湾盆地辽东湾地区辽西凸起JZ25-C区块变质岩岩性测井曲线交汇图

图中黑色数字表示钻井号。

Figure 2. Intersection of metamorphic rock lithology logging curves in JZ 25-C block in Liaoxi Uplift, Liaodong Bay area, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 3 渤海湾盆地辽东湾地区辽西凸起太古宇岩心特征

a.JZ25-C-2井，2 020.25~2 020.38 m，二长片麻岩；b.JZ25-C-2井，1 751.44 m，斜长片麻岩；c.JZ25-C-5井，1 801.60~1 801.75 m，花岗片麻岩；d.JZ25-C-2井，1 751.14~1 751.34 m，角闪花岗片麻岩；e.JZ25-B-2井，2 165~2 170 m，碎裂花岗岩；f.JZ20-A-3井，2 697.69 m，花岗质碎裂岩，颗粒破碎，裂缝发育；g.JZ20-A-3井，2 214.9 m，混合岩化片麻岩；h.JZ20-A-4井，2 668.7 m，混合岩；i.JZ20-A-5井，2 346.6 m，碱长混合片麻岩；j.JZ25-B-1井，2 923.1 m，混合花岗岩；k.JZ25-C-2井，2 020.51 m，碎裂化二长花岗岩；l.JZ20-A-5井，2 350.65 m，黑云二长花岗岩；m.JZ20-A-5井，2 351.41 m，变质花岗岩；n.JZ20-A-12D井，2 798.2~2 800 m，辉绿岩。

Figure 3. Core characteristics of Archean buried hills in Liaoxi Uplift, Liaodong Bay area, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 4 渤海湾盆地辽东湾地区辽西凸起太古宇岩石分布特征

Figure 4. Distribution characteristics of Archean rocks in Liaoxi Uplift, Liaodong Bay area, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 5 渤海湾盆地辽东湾地区辽西凸起太古宇储集空间及裂缝叠加特征

a.JZ25-B-2，1 956 m，碎裂岩裂缝发育，黑云母和钙质充填；b.JZ25-B-2，1 954 m，长英质裂缝均为钙质(先)和硅质(后) 充填；c.JZ25-B-2，1 960 m，裂缝钙质充填，云母溶蚀孔；d.JZ20-A-3井，2 102.62 m，斑状花岗岩；e.JZ20-A-7D井，2 691.57 m，花岗质碎裂岩；f.JZ20-A-4井，2 957.11 m，碎裂混合片麻岩。

Figure 5. Characteristics of Archean reservoir space and superposition of fractures in Liaoxi Uplift, Liaodong Bay area, Bohai Bay Basin

下载: 全尺寸图片幻灯片

图 6 渤海湾盆地辽东湾地区辽西凸起构造演化应力分布及裂缝走向

Figure 6. Stress distribution and crack direction of structural evolution of Liaoxi Uplift, Liaodong Bay area, Bohai Bay Basin

下载: 全尺寸图片幻灯片

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