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四川盆地须家河组致密砂岩物源体系的控储作用

姚文礼

姚文礼. 四川盆地须家河组致密砂岩物源体系的控储作用[J]. 地质科技通报, 2021, 40(5): 223-230. doi: 10.19509/j.cnki.dzkq.2021.0036
引用本文: 姚文礼. 四川盆地须家河组致密砂岩物源体系的控储作用[J]. 地质科技通报, 2021, 40(5): 223-230. doi: 10.19509/j.cnki.dzkq.2021.0036
Yao Wenli. Reservoir control of tight sandstone provenance system in Xujiahe Formation, Sichuan Basin[J]. Bulletin of Geological Science and Technology, 2021, 40(5): 223-230. doi: 10.19509/j.cnki.dzkq.2021.0036
Citation: Yao Wenli. Reservoir control of tight sandstone provenance system in Xujiahe Formation, Sichuan Basin[J]. Bulletin of Geological Science and Technology, 2021, 40(5): 223-230. doi: 10.19509/j.cnki.dzkq.2021.0036

四川盆地须家河组致密砂岩物源体系的控储作用

doi: 10.19509/j.cnki.dzkq.2021.0036
基金项目: 

国土资源部油气中心与中国石化战略合作项目 1211302108021-1

详细信息
    作者简介:

    姚文礼(1983-), 讲师, 主要从事地质与勘探开发方面的研究与教学工作。E-mail: 82396795@qq.com

  • 中图分类号: P534.51

Reservoir control of tight sandstone provenance system in Xujiahe Formation, Sichuan Basin

  • 摘要: 为明确四川盆地须家河组致密砂岩物源特征及控储作用,运用储层岩石学测试和镜下分析,研究了物源与储层发育的关系及分布,探讨了物源体系的控制因素。研究结果表明,四川盆地须家河组储层具有成分成熟度较低、物性差异性强、以中-细粒为主、主要为溶蚀孔隙和成岩效应存在两面性5个基本特征;物源控制了储层岩石类型的发育范围,平面展布存在差异性,其可溶矿物组分及含量亦有所不同,导致各地区孔隙发育及规模有所不同;西部龙门山和东北部大巴山是须家河组的主要供源区,前者表现为碳酸盐岩岩屑含量相对较高,后者表现为火山岩岩屑含量相对较高。不同时期造山活动强度的阶段性变化使得物源供应强度及类型也随之变化,储层岩石组分差异分化,进而控制储层垂向非均质性。研究成果可以为该区下一步的油气精细勘探提供借鉴。

     

  • 图 1  四川盆地及周缘地质简图

    Figure 1.  Geological map of the Sichuan Basin and its periphery

    图 2  须家河组四段储层物性特征

    Figure 2.  Reservoir physical properties of the Xujiahe Formation

    图 3  须家河组储层镜下特征

    a.S1,4 828~4 830 m,须二段,残余粒间孔,(-);b.S2,4 623~4 626 m,须五段,岩屑砂岩中的构造裂缝,(-);c.S3,4 740~4 745 m,须二段,云母被压变形,扫描电镜;d.S4,4 605~4 609 m,须二段,石英颗粒边缘次生加大,阴极发光;e.S5,4 612~4 615 m,须二段,岩屑砂岩中的长石沿解理缝被溶蚀,长石粒内溶孔,(-);f.S6,4 621~4 624 m,须二段,砂岩中的填隙物被溶蚀,粒间溶孔,扫描电镜;g.S7,4 734~4 738 m,须二段,石英砂岩中的颗粒微裂缝、构造裂缝,变质岩岩屑被溶蚀,粒内溶孔,(-);h.S8,4 098.7 m,须三段,岩(钙)屑砂岩,岩屑多为碳酸盐岩岩屑,(+);i.S9,4 701~4 705 m,须四段,砂砾岩中的碳酸盐岩砾石,(-)

    Figure 3.  Microscopic characteristics of the Xujiahe Formation reservoir

    图 4  须家河组二段孔隙类型分布图(据文献[14]修改)

    Figure 4.  Distribution of pore types in the second member of the Xujiahe Formation

    图 5  四川盆地须家河组物源体系图

    Figure 5.  Material sources system of the Xujiahe Formaticon in Sichuan Basin

    图 6  四川盆地须家河组岩石分类

    1.石英砂岩; 2.长石石英砂岩; 3.岩屑石英砂岩; 4.长石岩屑石英砂岩; 5.长石砂岩; 6.岩屑长石砂岩; 7.长石岩屑砂岩; 8.岩屑砂岩

    Figure 6.  Types of rocks of the Xujiahe Formaticon in Sichuan Basin

    图 7  四川盆地须家河组主要岩石类型分布图

    Figure 7.  Distribution map of rock-types of the Xujiahe Formaticon in Sichuan Basin

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  • 收稿日期:  2020-12-16

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