基于CO<sub>2</sub>置换的低渗透储层岩心饱和方法研究

韩学辉; 李峰弼; 戴诗华; 张娟娟; 唐俊; 王雪亮; 王洪亮

doi:10.11781/sysydz201406787

基于CO₂置换的低渗透储层岩心饱和方法研究

doi: 10.11781/sysydz201406787

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: 国家油气专项(2011ZX05009-003)资助。

详细信息

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

中图分类号: TE135
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出版历程
- 收稿日期: 2013-09-19
- 修回日期: 2014-10-08
- 刊出日期: 2014-11-28

Saturation method of low-permeability reservoir cores based on CO₂ displacement

1.
School of Geosciences, China University of Petroleum, Qingdao, Shandong 266580, China
2. Logging Company, CNPC West Drilling Engineering Company Limited, Qaramay, Xinjiang 834000, China

摘要

摘要: 针对低渗透储层岩心的饱和难题, 基于CO₂置换吸附气的原理开发了低渗透储层岩心饱和方法和实验装置, 通过饱水法孔隙度测量考察了该方法在26块低渗透储层岩心的应用效果。研究发现, 该方法饱和后饱水法孔隙度比常规饱和方法饱和后的饱水法孔隙度平均增加0.54%, 平均比氦气法孔隙度小0.14%左右, 饱和效果有明显改善并近于完全饱和;饱水法孔隙度相对增量与泥质含量存在正相关关系, 而与平均粒径、孔隙度、渗透率存在负相关关系, 表明该方法在消除致密岩心吸附气对饱和影响方面有很好的针对性, 可用于低渗透储层岩心的饱和。
- CO₂置换 /
- 低渗透储层 /
- 岩心饱和 /
- 吸附气 /
- 平均粒径 /
- 氦孔隙度 /
- 泥质含量
Abstract: In order to improve the saturation of low-permeability reservoir core, the saturation method and experimental device were developed based on CO₂ displacement of absorbed gas. The saturation effect was investigated by the measurement of saturated porosity with the employment of 26 cores from low-permeability reservoirs. It was demonstrated that saturation effect was significantly improved and was close to complete saturation because the saturated porosity of the new saturation method was 0.54% on average larger than that of the traditional saturation method and 0.14% on average smaller than helium porosity. Also, it was illustrated that the new saturation method had highly pertinence in reducing the effect of absorbed gas in tight cores and was able to be widely used for the saturation of low-permeability reservoir cores because the relative increment of saturated porosity by the new method increased positively with shale content and negatively with average grain size, helium porosity and permeability.
- CO₂ displacement /
- low-permeability reservoir /
- core saturation /
- absorbed gas /
- average grain size /
- helium porosity /
- shale content

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参考文献(19)

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