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| 坪北油田储层成岩作用与孔隙演化 |
| 李少华,陈新民,龙玉梅,姚凤英,张尚峰 |
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(1. 中国石油天然气集团公司勘探开发科学研究院, 北京 100083;
2. 江汉石油学院地球科学系, 湖北 荆州 434102;
3. 江汉油田勘探开发研究院, 湖北 潜江 433100) |
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| 摘要: |
| 根据15口取心井普通薄片、铸体薄片的镜下观察及扫描电镜、阴极发光、X衍射等资料的研究,坪北油田长4+5、长6油组储层砂体在整个成岩演化过程中,孔隙得到不同程度的改造。其中机械压实作用、胶结作用是原生孔隙损失的主要原因,可导致大约18%~27%的孔隙损失;溶蚀作用可平均新增孔隙5%左右,其产生的次生孔隙是主要的存储空间。最后总结了本地区储层的成岩序列与孔隙演化模式。 |
| 关键词: 孔隙演化 成岩作用 储层 油田 陕西 |
| DOI： |
| 附件 |
| 投稿时间：2002-03-03 |
| 基金项目: |
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| Diagenesis and porosity evolution in the reservoir rocks from the Pingbei Oil Field in Shaanxi |
| LI Shao-hua, CHEN Xin-min, LONG Yu-mei, YAO Feng-ying, ZHANG Shang-feng |
(1. Research Institute of Petroleum Exploration and Development, CNPC, Beijing 100083, China;
2. Jianghan College of Petroleum, Jingzhou 434102, Hubei, China;
3. Research Institute of Petroleum Exploration and Development, Jianghan Oil Field, Qianjiang 433100, Hubei, China) |
| Abstract: |
| The integration of scanning electron microscopy, cathodoluminescence and x-ray diffraction analysis of the thin sections and caststone thin sections from 15 wells shows that the porosities of the reservoir sandstones from the Chang4+5 and Chang-6 oil formations in the Pingbei Oil Field, Shaanxi have been subjected to reworking throughout the whole diagenetic processes by mechanical compaction and cementation which may have caused 18% to 27% of porosities to be lost. The dissolution may increase the porosities by about 5%. The secondary porosities are considered as the prevailing pore spaces favourable for the oil storage. |
| Key words: porosity evolution diagenesis reservoir rock oil field Shaanxi |