油气藏评价与开发 ›› 2023, Vol. 13 ›› Issue (1): 39-51.doi: 10.13809/j.cnki.cn32-1825/te.2023.01.005
林中凯1(),张少龙2,3,李传华1,王敏4,闫建平3,蔡进功2(),耿斌4,胡钦红5
收稿日期:
2022-11-07
出版日期:
2023-02-26
发布日期:
2023-01-30
通讯作者:
蔡进功
E-mail:linzhongkai.slyt@sinopec.com;jgcai@tongji.edu.cn
作者简介:
林中凯(1980—),男,硕士,高级工程师,主要从事油气勘探与管理工作。地址:山东省东营市东营区西四路633号胜利油田油气勘探管理中心,邮政编码:257001。E-mail: 基金资助:
LIN Zhongkai1(),ZHANG Shaolong2,3,LI Chuanhua1,WANG Min4,YAN Jianping3,CAI Jingong2(),GENG Bin4,HU Qinhong5
Received:
2022-11-07
Online:
2023-02-26
Published:
2023-01-30
Contact:
CAI Jingong
E-mail:linzhongkai.slyt@sinopec.com;jgcai@tongji.edu.cn
摘要:
为实现陆相富有机质页岩油储层高效开发,以东营凹陷博兴洼陷沙三下—沙四上纯上亚段湖相页岩为研究对象,利用岩石薄片、全岩衍射以及主微量元素等多种地质资料,在厘清岩相类型和沉积古环境演化阶段及二者耦合关系的基础上,划分出8种岩相组合类型,并基于不同组合类型页岩油甜点评价参数对比分析,确定了优势组合类型及其平面分布特征。结果表明:①博兴洼陷沙三下—沙四上纯上亚段主要发育富有机质纹层状泥质灰岩和灰质泥岩、富有机质层状泥质灰岩和灰质泥岩以及含有机质块状泥质灰岩和灰质泥岩6种岩相类型;②沙四上纯上至沙三下地层,沉积古环境整体上呈现出古气候由干旱到湿润、古氧化还原性变化不大、古盐度由高到低、古物源由少到多的变化特征,显示出8个演化阶段,对应8种岩相组合类型;③岩相组合F和D分别为沙三下和沙四上纯上亚段有利岩相组合类型,整体产能高且与当前生产实践吻合性较好;平面上,前者主要分布在F159-F156-F160井区,后者主要FYP1-F116-F119和F156-F159-F161井区,为博兴洼陷页岩油富集高产区域。
中图分类号:
林中凯,张少龙,李传华,王敏,闫建平,蔡进功,耿斌,胡钦红. 湖相页岩油地层岩相组合类型划分及其油气勘探意义——以博兴洼陷沙河街组为例[J]. 油气藏评价与开发, 2023, 13(1): 39-51.
LIN Zhongkai,ZHANG Shaolong,LI Chuanhua,WANG Min,YAN Jianping,CAI Jingong,GENG Bin,HU Qinhong. Types of shale lithofacies assemblage and its significance for shale oil exploration: A case study of Shahejie Formation in Boxing Sag[J]. Reservoir Evaluation and Development, 2023, 13(1): 39-51.
图4
博兴洼陷主要岩相岩心及普通岩石薄片镜下特征 注:a.富有机质纹层状泥质灰岩(岩心尺度),FY1井,3 433.1 m;b.富有机质纹层状灰质泥岩(岩心尺度),FY1井,3 414.5 m;c.富有机质层状泥质灰岩(岩心尺度),FYP1井,3 610.2 m;d.富有机质层状灰质泥岩(岩心尺度),FY1井,3 154.6 m;e.含有机质块状泥质灰岩(岩心尺度),FY1井,3 376.0 m;f.含有机质块状灰质泥岩(岩心尺度),FY1井,3 389.9 m;g.富有机质纹层状泥质灰岩,FYP1井,3 468.2 m;h.富有机质纹层状灰质泥岩,FYP1井,3 469.9 m;i.富有机质层状泥质灰岩,FYP1井,3 468.8 m;j.富有机质层状灰质泥岩,FYP1井,3 472.0 m;k.含有机质块状泥质灰岩,FYP1井,3 464.6 m;l.含有机质块状灰质泥岩,FY1井,3 252.8 m。"
表3
各岩相组合类型岩心测试TOC及沉积古环境指标均值"
沉积古 环境段 | 岩相组合 类型 | 岩心TOC (%) | 沉积古环境指标均值 | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
古气候 | 古氧化还原 | 古盐度 | 古物源 | |||||||||
Na/Al | CIA | U/Th | V/Cr | Sr/Ba | Al(%) | Ti(%) | ||||||
VIII | H | 2.615 | 0.083 | 71.390 | 0.686 | 1.110 | 2.290 | 5.510 | 0.287 | |||
VII | G | 2.451 | 0.083 | 70.663 | 0.738 | 1.002 | 3.548 | 4.420 | 0.210 | |||
VI | F | 3.497 | 0.119 | 67.788 | 0.785 | 1.172 | 3.759 | 5.272 | 0.311 | |||
V | E | 2.265 | 0.111 | 68.877 | 0.752 | 1.163 | 4.983 | 4.522 | 0.218 | |||
IV | D | 2.258 | 0.113 | 67.884 | 0.685 | 1.184 | 5.122 | 4.732 | 0.240 | |||
III | C | 2.083 | 0.132 | 65.463 | 0.906 | 1.241 | 7.112 | 2.757 | 0.138 | |||
II | B | 2.251 | 0.156 | 63.801 | 0.911 | 1.402 | 5.694 | 4.859 | 0.321 | |||
I | A | 2.021 | 0.180 | 60.558 | 0.994 | 11.576 | 6.223 | 3.630 | 0.178 |
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