论文详情

石蜡沉积对储层的伤害

海洋石油

2007年 27卷第1期

阅读：128

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Title

Reservoir damage caused by paraffin precipitation

作者

杨帆李治平周金应张世浩李庚

Authors

Yang Fan Li Zhiping Zhou Jinying Zhang Shihao Li Geng

单位

中国地质大学沉积盆地与能源地质实验室, 北京 100083

Organization

Sedimentary Basin and Energy Geological Laboratory, China University of Geosciences, Beijing 100083

摘要

石蜡和沥青质的沉积是目前国内外油气开采研究中的热点和难点, 石蜡的沉积会造成井眼损伤、堵塞输油管道、降低采收率等危害, 而在生产过程中又会不可避免的出现石蜡沉积现象。根据岩石-毛细管模型, 以及地层孔隙度、渗透率和比面的关系推导出了石蜡沉积以后的孔隙度和渗透率的变化公式, 并通过实例计算证实石蜡沉积以后, 地层的孔隙度和渗透率都有不同程度的下降。

Abstract

he precipitation of paraffin, which attracted much attention among oil engineers, caused a lot of damage during the whole oil-gas production segments. However, it is unavoidable for paraffin precipitating when producing oil. This paper used rock-capillary model to simulate the formation pore volume, and derives the variation equation between paraffin precipitation and formation parameters using the correlation among surface area to volume ratio, porosity and permeability, etc. Through a practical calculation we made a conclusion that porosity and permeability have declined separately after the precipitation of paraffin.

关键词：

石蜡沉积; 孔隙度; 渗透率; 比面;

Keywords:

paraffin precipitation; porosity; permeability; surface area to volume ratio;

基金项目

国家科技部重大基础研究(973)项目(编号:2001-CB-209-108)资助

DOI