| 低渗透砂岩油气储层裂缝及其渗流特征 |
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| 引用本文： | 曾联波.低渗透砂岩油气储层裂缝及其渗流特征[J].地质科学,2004,39(1):11-17. |
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| 作者姓名： | 曾联波 |
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| 作者单位： | 石油大学油气成藏机理教育部重点实验室,北京,102249 |
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| 基金项目： | 石油科技中青年创新项目，国家重点基础研究发展计划(973计划) |
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| 摘 要： | 综合分析了不同地区低渗透砂岩油气储层裂缝的发育规律、渗流特征及其控制因素,发现低渗透砂岩储层裂缝以高角度构造裂缝为主,裂缝的间距一般呈对数正态函数分布,并与岩层厚度呈正线性相关关系。裂缝的发育受岩性、岩层厚度、沉积微相、构造和应力等因素控制。裂缝渗透性受现应力场的影响,通常与现应力场最大主应力方向近平行裂缝的渗透性最好,但其它方向裂缝的渗流作用不容忽视。裂缝提高了低渗透砂岩储层的可动油饱和度,同时又影响井网部署和注水开发效果。
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| 关 键 词： | 裂缝 发育规律 渗流特征 低渗透砂岩储层 |
| 文章编号： | 0563-5020(2004)01-0011-07 |
| 收稿时间： | 2001-07-01 |
| 修稿时间： | 2001年7月1日 |
FISSURE AND ITS SEEPAGE CHARACTERISTICS IN LOW-PERMEABLE SANDSTONE RESERVOIR |
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| Zeng Lianbo.FISSURE AND ITS SEEPAGE CHARACTERISTICS IN LOW-PERMEABLE SANDSTONE RESERVOIR[J].Chinese Journal of Geology,2004,39(1):11-17. |
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| Authors: | Zeng Lianbo |
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| Institution: | Key Laboratory for Hydrocarbon Accumulation, Ministry of Education, University of Petroleum, Beijing 102249 |
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| Abstract: | The developing laws, seepage characteristics and controlled factors of fissures in low permeability sandstone reservoir in selected regions were studied. The fissures in low permeability sandstone reservoir were mainly tectonic ones and regional ones with high dip angle. The spacings of fissures generally followed a log normal distribution, directly proportional to layer thickness. The development degree of fissures was controlled by lithology, layer thickness, sedimentary microfacies,structure and stress. The seepage of fissures was controlled by modern tectonic stress field. Usually, the seepage of fissures parallel to the maximum stress direction was the biggest, but the seepage of other fissures could not be neglected. Fissures could enhance movable fluid saturation of low permeability reservoir, and affect the pattern arrangement and development efficiency by water injection. |
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| Keywords: | Fissure Developing law Seepage feature Low permeability sandstone reservoir |
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