高邮凹陷南坡真武—曹庄地区戴南组砂岩成岩作用及其对储层性质的影响

李德勇; 张金亮; 姜效典; 江志强

doi:10.3799/dqkx.2013.013

高邮凹陷南坡真武—曹庄地区戴南组砂岩成岩作用及其对储层性质的影响

doi: 10.3799/dqkx.2013.013

李德勇^{1, 2,},
张金亮³,
姜效典^{1, 2},
江志强⁴

1.
中国海洋大学海洋地球科学学院, 山东青岛 266100
2.
海底科学与探测技术教育部重点实验室, 山东青岛 266100
3.
北京师范大学资源学院, 北京 100875
4.
中海石油(中国)有限公司上海分公司, 上海 200030

基金项目:

国家科技支撑计划 2006BAC18B05

山东省自然科学基金 2009ZRB02103

详细信息

作者简介:
李德勇(1984-), 男, 讲师, 博士, 主要从事油气储层地质方面的研究及教学工作.E-mail: sdlclqldy@163.com

中图分类号: P624
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出版历程
- 收稿日期: 2012-03-20
- 刊出日期: 2013-01-15

Diagenesis and Its Effect on Dainan Sandstone Reservoir in Zhenwu-Caozhuang Region of Southern Slope of Gaoyou Depression

1.
College of Marine Geosciences, Ocean University of China, Qingdao 266100, China
2.
Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Qingdao 266100, China
3.
College of Resources Science and Technology, Beijing Normal University, Beijing 100875, China
4.
Shanghai Branch of CNOOC Ltd., Shanghai 200030, China

摘要

摘要: 在详细岩心观察描述的基础上, 利用铸体薄片、扫描电镜、压汞分析、X-射线衍射、埋藏史-热史模拟等多种分析测试手段, 对戴南组砂岩成岩作用特征进行了详细研究, 发现砂岩储层主要经历了压实、胶结、溶蚀和交代作用, 自生胶结物主要有高岭石等粘土矿物、铁碳酸盐、石英、长石及硬石膏等, 发生溶蚀则主要为长石和岩屑, 戴南组地层现今主要处于晚成岩的A期.戴南组砂岩储层主要受压实作用、高岭石胶结、铁碳酸盐胶结、石英次生加大及溶蚀作用的影响, 发育塑性组分溶蚀成岩相和高岭石充填成岩相的储层性质往往较好, 是有利的油气储集带; 而发育压实-充填成岩相和碳酸盐胶结成岩相的储层孔渗性能很差, 多为致密储层.
- 成岩作用 /
- 储层性质 /
- 成岩相 /
- 高邮凹陷 /
- 石油地质
Abstract: Determination of the effects of diagenesis on Dainan sandstone reservoir in Zhenwu-Caozhuang region can facilitate the prediction of the beneficial oil reservoir. Based on core observation, the diagenetic characteristics of Dainan reservoir has been studied in detail by using case thin section, SEM, mercury penetration, X-ray and buried-thermal history modeling. Dainan sandstone has experienced such processes as the compaction, cementation, dissolution and metasomatism. Authigenetic cement includes clay mineral, ferrum carbonate, quartz, feldspar and anhydrite. Feldspar and fragment have mainly suffered dissolution. Dainan Formation is in the period A of mesodiagenesis. Dainan reservoir quality is mainly controlled by compaction, kaolinite cementation, ferrum carbonate cementation, overgrowth quartz and dissolution. Sandstone reservoirs in which dissolution or kaolinite infill diagenentic lithofacies develop commonly have higher porosity and permeability, while reservoirs developing compact-filling or carbonate cementation diagenentic lithofacies usually have poor physical property.
- diagenesis /
- reservoir quality /
- diagenetic lithofacies /
- Gaoyou depression /
- petroleum geology

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图 1 研究区区域位置

Fig. 1. Location of research area

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图 2 真武-曹庄地区戴南组砂岩类型

Fig. 2. The triangular plot of Dainan sandstone type

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图 3 戴南组砂岩成岩事件铸体薄片和扫描电镜特征

a.碎屑压实呈假杂基化及局部含铁碳酸盐胶结，肖7井，3104.6m，铸体片；b.书本状、蠕虫状高岭石充填粒间孔隙且晶体具不同程度溶蚀，真98井，2513.7m；c.粒表绿泥石包膜与孔隙充填高岭石，曹38井，2627.8m；d.粒表绿泥石包膜与粒间孔隙中的绿泥石和自生石英，曹13井，3225.9m；e.石英次生加大、粒间孔隙中伊利石污浊高岭石现象和自生长石，肖7井，3104.6m；f.粒表伊利石粘土膜与粒间孔隙中的自生石英和伊利石，真86，3134.2m；g.石英次生加大与孔喉中的伊利石粘土桥，肖3井，3129.9m；h.粒间孔隙中绿泥石和伊利石共生，曹21井，3497.4m；i.粒表卷曲状伊利石膜和自生石英，真98井，2573.9m；K.高岭石(Kaolinite)；Q.石英(Quartz)；Ch.绿泥石(Chlorite)；F.长石(Feldspar)；I.伊利石(Illite).

Fig. 3. Optical and SEM photomicrographs

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图 4 戴南组砂岩压实作用与胶结作用减孔评价

Fig. 4. The triangular plot of compaction porosity loss versus cementation porosity loss of Dainan sandstone

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图 5 戴南组砂岩中自生矿物铸体薄片和扫描电镜特征

a.石英压溶加大、钠长石加大边与铁白云石交代碎屑，真86井，3134.2m，铸体片；b.含铁碳酸盐胶结及其交代碎屑，真157井，2837.6m，铸体片；c.长石碎屑溶蚀、石英次生加大与自生绿泥石，曹13井，3225.9m；d.粒间书本状高岭石和粒状方解石晶体，曹38井，2627.8m；e.粒间孔中的铁方解石、自生长石、自生石英、绿泥石和伊利石，曹21井，3497.4m；f.石英、长石次生加大与粒间孔中的高岭石，曹38井，2648.6m；g.粒表绿泥石、自生石英与粒间孔隙中的板条状自生长石，真157井，2837.6m；h.长石溶蚀与粒间孔隙中的高岭石和自生石英，真80井，2863.8m；i.长石溶蚀及其粒表自生长石生长与石英次生加大，真86井，3134.2m；Al.钠长石(Albite)；Ak.铁白云石(Ankerite)；Fc.铁方解石(Ferrocalcite)；Cc.方解石(Calcite)；Q.石英(Quartz)；Ch.绿泥石(Chlorite)；F.长石(Feldspar)；I.伊利石(Illite)；K.高岭石(Kaolinite)

Fig. 5. Optical and SEM photomicrographs

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图 6 戴南组砂岩储层孔渗与胶结物含量关系

Fig. 6. Scatter diagrams showing relationship between poroperm and cement

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图 7 戴南组砂岩成岩演化阶段

Fig. 7. Diagenetic stages of Dainan Formation

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图 8 真武-曹庄地区戴一1亚段储层成岩相分布预测

Fig. 8. Distribution of diagenetic facies of E₂d₁¹ sandstone reservoir

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