石英矿物类型及其对页岩气富集开采的控制:以四川盆地及其周缘五峰组-龙马溪组为例

孙川翔; 聂海宽; 刘光祥; 张光荣; 杜伟; 王濡岳

doi:10.3799/dqkx.2019.203

石英矿物类型及其对页岩气富集开采的控制:以四川盆地及其周缘五峰组-龙马溪组为例

doi: 10.3799/dqkx.2019.203

孙川翔^1,2,3, ,,
聂海宽^1,2,3,
刘光祥^1,2,3,
张光荣⁴,
杜伟^1,2,3,
王濡岳^1,2,3

1.
页岩油气富集机理与有效开发国家重点实验室, 北京 100083
2.
中国石油化工股份有限公司石油勘探开发研究院, 北京 100083
3.
中国石油化工集团公司页岩油气勘探开发重点实验室, 北京 100083
4.
中国地质大学能源学院, 北京 100083

基金项目:

国家科技重大专项 2016ZX05061-001

国家自然科学基金项目 41872124

详细信息

作者简介:
孙川翔(1990-), 女, 工程师, 硕士, 主要从事页岩气地质研究工作

中图分类号: P618
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- 文章访问数: 4895
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- 被引次数: 0
出版历程
- 收稿日期: 2019-02-03
- 刊出日期: 2019-11-15

Quartz Type and Its Control on Shale Gas Enrichment and Production: A Case Study of the Wufeng-Longmaxi Formations in the Sichuan Basin and Its Surrounding Areas, China

Sun Chuanxiang^{1,2,3
,
,},
Nie Haikuan^1,2,3,
Liu Guangxiang^1,2,3,
Zhang Guangrong⁴,
Du Wei^1,2,3,
Wang Ruyue^1,2,3

1.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China
2.
SINOPEC Petroleum Exploration and Production Research Institute, Beijing 100083, China
3.
SINOPEC Key Laboratory of Shale Oil/Gas Exploration & Production, Beijing 100083, China
4.
School of Energy Resources, China University of Geosciences, Beijing 100083, China

摘要

摘要: 页岩矿物组成控制着页岩的储层类型和岩石力学性质，并影响着页岩气的富集和开发.为了分析不同类型石英矿物的纵向变化特征及其对页岩气富集开采的控制作用，以四川盆地及其周缘五峰组-龙马溪组WF2-LM4和LM5-LM8两个笔石带页岩为主要研究对象，利用普通薄片观察、扫描电镜、矿物成岩世代关系、能谱分析等手段，识别出陆源碎屑石英、生物成因石英和黏土矿物转化过程中形成的3种石英类型.结果表明不同的页岩层段，3种成因的石英含量不同.生物成因石英在WF2-LM4笔石带页岩最为富集，向上到LM5-LM8笔石带页岩逐渐减少.在WF2-LM4笔石带页岩，生物成因石英与有机碳含量呈明显的正相关性，有利于页岩优质储层的形成，对页岩储层的压裂改造具有积极作用，实现了页岩赋气和改造的有机统一.研究认为四川盆地及其周缘地区五峰组-龙马溪组一段下部黑色页岩（WF2-LM4笔石带页岩）具有生物成因石英含量高，页岩生烃、储集能力和可压裂性最优的特点，是页岩气富集开采的有利层段.
- 页岩气 /
- 生物成因石英 /
- 五峰组 /
- 龙马溪组 /
- 四川盆地 /
- 油气地质
Abstract: Mineral compositions control the type and key physical properties of shale gas reservoir. To analyze the characteristics of different types of quartz minerals in the longitudinal direction and their effects on shale gas enrichment and development, two graptolite shale zones are scrutinized including WF2-LM4 and LM5-LM8 of the Wufeng-Longmaxi Formations in the Sichuan basin and its surrounding areas. Three types of quartz are identified which are detrital quartz, biogenic quartz and quartz sourced from clay mineral reactions by means of thin section examination, scanning electron microscopy(SEM), mineral diagenesis and energy spectrum analysis. The contents of the three types of quartz vary in different shale intervals. Biogenic quartz is most abundant in the WF2-LM4 graptolite shale zone and gradually decreases upward to the LM5-LM8. In the WF2-LM4 graptolite shale zone, there is a clear positive correlation between biogenic quartz and organic carbon content, which is conducive not only to the formation of favorable shale reservoirs but also to the fracturing of shale reservoirs, realizing the integrity of shale gas enrichment and formation stimulation. The development areas of black shale from the Wufeng Formation and the first section of the Longmaxi Formation (WF2-LM4 graptolite shale zone) are identified as favorable targets providing abundant material basis for shale gas enrichment.
- shale gas /
- biogenic quartz /
- Wufeng Formation /
- Longmaxi Formation /
- Sichuan basin /
- petroleum geology

HTML全文

图 1 四川盆地及其周缘五峰组-龙马溪组主要页岩气田和页岩气井

威远地区、长宁地区和昭通地区的页岩气藏资料据聂海宽等（2012）和陈旭等(2015）；LaiY1井资料据梁狄刚等（2009）和聂海宽等（2017)

Fig. 1. Major gas fields and typical shale gas wells in the Sichuan basin and its surrounding areas

下载: 全尺寸图片幻灯片

图 2 五峰组-龙马溪组页岩中陆源碎屑石英和生物成因石英

a.彭页1井五峰组; b.焦页4井龙马溪组

Fig. 2. Detrital quartz and biogenic quartz in the Wufeng-Longmaxi Formations

下载: 全尺寸图片幻灯片

图 3 焦页1井五峰组生物成因石英及其能谱

Fig. 3. Biogenic quartz in Well JY1 from the Wufeng Formation and its spectrum diagram

下载: 全尺寸图片幻灯片

图 4 焦页1井五峰组生物成因石英及其能谱

多孔有机质内包裹的石英晶体，可能为生物成因石英，含有一定的碳

Fig. 4. Biogenic quartz in Well JY1 from the Wufeng Formation and its spectrum diagram

下载: 全尺寸图片幻灯片

图 5 页岩黏土矿物转化成因微晶石英及其能谱

a.威页1井，龙马溪组；b.焦页2井，五峰组，黏土矿物转化成片晶状石英；c, d.分别对应a、b中能谱

Fig. 5. Microcrystalline quartz formed during clay mineral diagenesis and its spectrum diagram

下载: 全尺寸图片幻灯片

图 6 焦页1井伊利石与伊蒙混层相关性

Fig. 6. Correlation between illite and illite/smectite in Well JY1

下载: 全尺寸图片幻灯片

图 7 焦石坝背斜JY1井页岩气综合柱状图和勘探开发层段划分

据Jin et al. (2018)修改

Fig. 7. Comprehensive shale gas column diagram and E & D interval division of Well JY1 in the Jiaoshiba anticline

下载: 全尺寸图片幻灯片

图 8 焦页2井五峰组-龙马溪组页岩主量元素含量垂向分布特征

焦页2井距焦页1井约10 km，由于海相页岩沉积相变化不大，故各笔石带页岩厚度可以根据焦页1井类比（赵建华等, 2016；岩性图例同图 7）

Fig. 8. Longitudinal variations of bulk element content in Well JY2 from the Wufeng-Longmaxi Formation shales

下载: 全尺寸图片幻灯片

图 9 渝东焦石坝地区焦页1井石英含量和有机碳含量关系

据聂海宽等(2016)

Fig. 9. Quartz and organic carbon content relationship in Well JY1 in the Jiaoshiba area

下载: 全尺寸图片幻灯片

图 10 渝东地区武隆向斜隆页1井五峰组-龙马溪组页岩中陆源碎屑石英和生物成因石英

Fig. 10. Detrital quartz and biogenic quartz in Well LY1 from the Wufeng-Longmaxi Formation shales

下载: 全尺寸图片幻灯片

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