鄂尔多斯盆地典型夹层型页岩油地质特征及潜力评价：以宁228井长7段为例

辛红刚; 田杨; 冯胜斌; 岳贤和; 陈薪凯; 淡卫东; 罗顺社

doi:10.19509/j.cnki.dzkq.tb20220224

鄂尔多斯盆地典型夹层型页岩油地质特征及潜力评价：以宁228井长7段为例

doi: 10.19509/j.cnki.dzkq.tb20220224

辛红刚^1,,
田杨^{2a, 2b, ,},
冯胜斌¹,
岳贤和^{2a, 2b},
陈薪凯¹,
淡卫东¹,
罗顺社^{2a, 2b}

1.
长庆油田勘探开发研究院, 西安 710200
2a.
长江大学非常规油气省部共建协同创新中心, 武汉 430100
2b.
长江大学地球科学学院, 武汉 430100

基金项目:

湖北省教育厅科学研究计划资助项目 Q20221311

非常规油气省部共建协同创新中心开放基金项目 UOG2022-40

详细信息

作者简介:
辛红刚(1972—), 男, 高级工程师, 主要从事油藏评价研究。E-mail: xinhg_cq@petrochina.com.cn

通讯作者:
田杨(1989—), 男, 讲师, 主要从事成藏动力学和成藏机理研究。E-mail: ty@yangtzeu.edu.cn

中图分类号: P618.130.2
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- 文章访问数: 864
- PDF下载量: 81
- 被引次数: 0
出版历程
- 收稿日期: 2021-10-17

Geological characteristics and potential evaluation of typical interlayer shale oil in the Ordos Basin: A case study of the Chang 7 Member of Well Ning228

Xin Honggang^1
,,
Tian Yang^{2a, 2b
, ,},
Feng Shengbin¹,
Yue Xianhe^{2a, 2b},
Chen Xinkai¹,
Dan Weidong¹,
Luo Shunshe^{2a, 2b}

1.
The Exploration and Development Research Institute of Changqing Oilfield, Xi′an 710200, China
2a.
Cooperative Innovation Center of Unconventional Oil and Gas of Ministry of Education & Hubei Province, Yangtze University, Wuhan 430100, China
2b.
School of Geosciences, Yangtze University, Wuhan 430100, China

摘要

摘要:
鄂尔多斯盆地长7段具有较好的页岩油资源潜力。长7段砂岩夹层型页岩油的勘探开发已经取得了实质性突破, 泥页岩型页岩油的勘探开发潜力巨大, 是长庆油田未来重要的油气接替资源, 但其相关地质基础性研究相对薄弱。通过对宁228井长7段全取心段厘米级岩心观察描述及系统采样, 一系列实验测试分析及鉴定结果表明：长7段主要发育黑色页岩、暗色泥岩、粉细砂岩及凝灰岩4种岩石类型；长7段烃源岩整体条件优越, 泥页岩有机碳含量高, 生烃潜力大, 有机质类型以Ⅰ型、Ⅱ型为主, 均处于低成熟-成熟阶段, 其中黑色页岩具有更高的有机质丰度；长7段主要储集空间为原生孔隙和次生孔隙, 泥页岩主要发育有机孔和无机孔, 粉细砂岩主要发育残余粒间孔、粒内孔和粒间孔, 凝灰岩则以粒间孔、矿物粒内孔为主；长7段整体含油性较好, 但可动性差异性大, 砂岩、凝灰岩的流体可流动性较好, 泥页岩的可流动性较差。总之, 典型夹层型页岩油精细解剖分析可以为推动鄂尔多斯盆地页岩油规模性开发提供有利指导。
- 鄂尔多斯盆地长7段 /
- 夹层型页岩油 /
- 沉积学特征 /
- 潜力评价
Abstract:
The Chang 7 Member of the Ordos Basin has favorable shale oil resource potentiality. The exploration and development of sandstone interlayer shale oil in the Chang 7 Member has made substantial breakthroughs. The exploration and development potential of shale oil is huge, and will be a significant oil and gas alternative resource in the Changqing Oilfield in the future, but its related geological fundamental research is relatively weak. Based on the observation, description and systematic sampling of the centimeter-level core of the full core section of Chang 7 Member in Well Ning228, a series of experimental test analyses and identification outcomes indicated that Chang 7 Member primarily developed four rock types: Black shale, dark mudstone, siltstone and tuff. The overall conditions of source rocks in the Chang 7 member are superior, the organic carbon content of shale is high, and the hydrocarbon generation potential is large. The organic matter types are mainly type Ⅰ and type Ⅱ, which are in the low mature-mature stage, and the black shale has higher organic matter abundance. The main reservoir spaces of the Chang 7 Member are primary pores and secondary pores. Mud shale primarily develops organic pores and inorganic pores. Fine sandstone mainly develops residual intergranular pores, intragranular pores and intergranular pores. Tuff mainly develops intergranular pores and mineral intragranular pores. The overall oil-bearing property of the Chang 7 Member is good, but the mobility difference is large. The fluid mobility in sandstone and tuff is good, and the mobility inshale is poor. In short, fine anatomical analysis of typical interlayer shale oil provides favorable guidance for promoting the large-scale development of shale oil in the Ordos Basin.
- Chang 7 Member of the Ordos Basin /
- interlayer shale oil /
- sedimentological characteristics /
- potential evaluation

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图 1 鄂尔多斯盆地区域构造图(a)与延长组岩性柱状图(b)

Figure 1. Regional tectonic unit map of the Ordos Basin (a) and the comprehensive stratigraphic columnar map of the stratigraphy of the Yanchang Formation (b)

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图 2 宁228井长7段不同岩石类型岩石学特征

a.宁228井, 长7₃, 1 763.75 m, 页岩；b.宁228井, 长7₃, 1 762.30 m, 页岩；c.宁228井, 长7₃, 1 764.55 m, 油页岩具硅质纹层, 单偏光；d.宁228井, 长7₁, 1 672.75 m, 泥岩；e.宁228井, 长7₁, 1 672.50 m, 泥岩；f.宁228井, 长7₁, 1 672.50 m, 粉砂岩中具有机质纹层, 单偏光；g.宁228井, 长7₂, 1 720.60 m, 块状层理细砂岩；h.宁228井, 长7₂, 1 720.25 m, 由长石、石英颗粒、黏土杂基和少量碳酸盐矿物组成, 单偏光；i.宁228井, 长7₂, 1 728.40 m, 鲍马序列层理粉细砂岩, 具明显的火焰构造, 粉砂岩单层厚度较小, 单层厚度1~10 cm；j.宁228井, 长7₂, 1 728.35 m, 具明显火焰构造, 单偏光；k.宁228井, 长7₂, 1 697.75 m, 灰黄色凝灰岩中具有机质纹层；l.宁228井, 长7₂, 1 697.50 m, 蚀变凝灰岩中发育富有机质纹层状构造, 单偏光

Figure 2. Sedimentary petrology characteristics of different rock types in the Chang 7 Member of Well Ning228

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图 3 鄂尔多斯盆地宁228井长7段沉积与地球化学综合分析图

Figure 3. Comprehensive graphics for sedimentary and geochemical analysis of Chang 7 Member of Well Ning228 in Ordos Basin

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图 4 鄂尔多斯盆地宁228井长7段烃源岩有机质丰度判别图(a)和有机质类型图(b)

Figure 4. Organic matter abundance discrimination (a) and organic matter type diagram (b) of source rock in the Chang 7 Member of Well Ning28 in the Ordos Basin

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图 5 鄂尔多斯盆地宁228井长7段泥页岩与砂岩主要储集空间

a.宁228井, 长7₃, 1 758.85 m, 有机孔呈斑点状；b.宁228井, 长7₃, 1 751.10 m, 黑色有机质呈不规则的条状分布；c.宁228井, 长7₃, 1 741.75 m, 长英质矿物颗粒间发育的微孔隙；d.宁228井, 长7₂, 1 719.00 m, 黏土和杂基中发育大量微孔隙；e.宁228井, 长7₁, 1 693.70 m, 自形晶黄铁矿粒间充填有机质；f.宁228井, 长7₂, 1 723.00 m, 长石溶蚀孔隙发育；g.宁228井, 长7₂, 1 669.80 m, 残余粒间孔发育；h.宁228井, 长7₂, 1 707.80 m, 片丝状伊利石附着于颗粒表面发育伊利石晶间孔；i.宁228井, 长7₂, 1 767.35 m, 高岭石晶间孔

Figure 5. Main reservoir space of shale and sandstone in the Chang 7 Member of Well Ning228 in the Ordos Basin

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图 6 鄂尔多斯盆地宁228井长7段凝灰岩主要储集空间

a.宁228井, 长7₃, 1 761.20 m, 黏土矿物粒间孔发育；b.宁228井, 长7₃, 1 751.10 m, 粒间孔发育；c.宁228井, 长7₃, 1 742.75 m, 长石颗粒边缘发育溶蚀孔；d.宁228井, 长7₂, 1 719.00 m, 黄铁矿边缘发育微裂缝；e.宁228井, 长7₃, 1 764.15 m, 孔隙联通缝；f.宁228井, 长7₁, 1 751.7 m, 孔隙联通缝

Figure 6. Main reservoir space of tuff in the Chang 7 Member of Well Ning228, Ordos Basin

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图 7 鄂尔多斯盆地宁228井长7段典型样品页岩油含油性评价

Figure 7. Oiliness evaluation of typical shale oil samples from the Chang 7 Member of Well Ning228 in the Ordos Basin

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图 8 鄂尔多斯盆地宁228井长7段不同岩石类型可动流体对比分析

a.井深1 751.00 m, 页岩；b.井深1 718.90 m, 泥岩；c.井深1 722.55 m, 细砂岩；d.井深1 767.45 m, 凝灰岩

Figure 8. Comparative analysis of movable fluids for different types of rocks in the Chang 7 Member of Well Ning228, Ordos Basin

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图 9 鄂尔多斯盆地宁228井长7段页岩、砂岩抽提物族组分特征分布图

Figure 9. Distribution map of the group composition characteristics of shale and sandstone extracts in the Chang 7 Member of Well Ning228, Ordos Basin

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