一种实用的CO<sub>2</sub>溶解气驱岩心洗油方法

韩学辉; 杨龙; 王洪亮; 王雪亮; 房涛; 张娟娟

doi:10.11781/sysydz201301111

一种实用的CO₂溶解气驱岩心洗油方法

doi: 10.11781/sysydz201301111

1.
中国石油大学(华东) 地球科学与技术学院, 山东青岛 266580
2. 中国石油天然气股份有限公司新疆油田公司实验检测研究院, 新疆克拉玛依 834000
3. 中国石油天然气股份有限公司西部钻探工程有限公司测井公司, 新疆克拉玛依 834000

基金项目: 山东省自然科学基金(Y2008E08);国家油气专项(2011ZX05009-003)联合资助。

详细信息

作者简介:
韩学辉(1974- ),男,博士,副教授,硕士生导师,从事储层岩石物理研究。E-mail:hxhlogging@yahoo.com.cn。

中图分类号: TE135.1
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出版历程
- 收稿日期: 2012-02-14
- 修回日期: 2012-11-23
- 刊出日期: 2013-01-28

A practical core cleaning method based on CO₂ dissolved gas drive

1.
School of Geosciences, China University of Petroleum, Qingdao, Shandong 266555, China
2. Research Institute of Experiment and Detection, Xinjiang Oilfield Company, PetroChina, Karamay, Xinjiang 834000, China
3. Well Logging Company, Western Drilling Engineering Corporation of, PetroChina, Karamayi, Xinjiang 834000, China

摘要

摘要: 为了提高岩心的洗油效率,开发了一种实用的CO₂溶解气驱岩心洗油方法。该方法在Stewart设计的CO₂溶解气驱方法的基础上,增加了洗油室抽真空、CO₂预清洗、溶剂回收3个步骤。使用自行研制的DGO-1型CO₂溶解气驱洗油装置,实验考察了新方法的洗油效果。6块不同孔隙度、渗透率的岩心的洗油结果表明,经过6~10次CO₂溶解气驱后,岩心荧光级别均小于3级,孔隙度和渗透率趋于稳定,可满足石油天然气行业标准SY/T 5336-2006的要求,且洗油时间(2~3天)较常规脂肪抽提洗油(2~3周或更长)有大幅度减少。该方法洗油原理清楚,洗油装置简单,易于操作,洗油效率高,清洁环保,推荐作为一种实用方法在岩石物理实验室推广使用。
- CO₂溶解气驱 /
- 岩心洗油 /
- CO₂预清洗 /
- 荧光级别 /
- 孔隙度 /
- 渗透率
Abstract: In order to improve the efficiency of core cleaning, a practical core cleaning method based on CO₂ dissolved gas drive was developed. The method added vacuum-pumping, CO₂ pre-cleaning and solvent recovery to the method designed by Stewart in 1952. Then, the effect of core cleaning was observed through a series of experiment with the employment of DGO-1 type CO₂ dissolved gas drive core cleaning device which was self-made. The results of core cleaning of 6 rocks with different porosities and permeabilities showed that the fluorescence level was less than 3 and the porosity and permeability were steady after 6-10 circles. The effect met the standard SY/T 5336-2006. The period of core cleaning with the employment of the new method was 2-3 days, which was less than that of Soxhlet extraction device (2-3 weeks or longer). Since the method had the characteristics of clear principle, simple device, good operability, high efficiency and was environmental-friendly, it was recommended to popularize in rock physics lab.
- CO₂ dissolved gas drive /
- core cleaning /
- CO₂ pre-cleaning /
- fluorescence level /
- porosity /
- permeability

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