超临界二氧化碳萃取泥页岩中可动油实验研究

王强; 李志明; 钱门辉; 蒋启贵; 曹婷婷; 刘鹏; 鲍云杰; 陶国亮

doi:10.11781/sysydz202004646

超临界二氧化碳萃取泥页岩中可动油实验研究

doi: 10.11781/sysydz202004646

王强^{1, 2, 3,},
李志明^{1, 2, 3, ,},
钱门辉^{1, 2, 3},
蒋启贵^{1, 2, 3},
曹婷婷^{1, 2, 3},
刘鹏^{1, 2, 3},
鲍云杰^{1, 2, 3},
陶国亮^{1, 2, 3}

1.
中国石化石油勘探开发研究院无锡石油地质研究所, 江苏无锡 214126
2.
页岩油气富集机理与有效开发国家重点实验室, 江苏无锡 214126
3.
中国石化油气成藏重点实验室, 江苏无锡 214126

基金项目:

国家科技重大专项 2017ZX05049-001

中国石油化工股份有限公司科技开发部项目 P17027-1

详细信息

作者简介:
王强(1967-), 男, 高级工程师, 从事油气地球化学评价研究和仪器研发研制。E-mail: wangqiang.syky@sinopec.com

通讯作者:
李志明(1968-), 男, 研究员, 从事油气地球化学、页岩油气地质研究。E-mail: lizm.syky@sinopec.com

中图分类号: TE135.6
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- 被引次数: 0
出版历程
- 收稿日期: 2020-03-07
- 修回日期: 2020-06-10
- 刊出日期: 2020-07-28

Movable oil extraction from shale with supercritical carbon dioxide

WANG Qiang^{1, 2, 3
,},
LI Zhiming^{1, 2, 3
, ,},
QIAN Menhui^{1, 2, 3},
JIANG Qigui^{1, 2, 3},
CAO Tingting^{1, 2, 3},
LIU Peng^{1, 2, 3},
BAO Yunjie^{1, 2, 3},
TAO Guoliang^{1, 2, 3}

1.
Wuxi Research Institute of Petroleum Geology, SINOPEC, Wuxi, Jiangsu 214126, China
2.
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, Jiangsu 214126, China
3.
SINOPEC Key Laboratory of Petroleum Accumulation Mechanisms, Wuxi, Jiangsu 214126, China

摘要

摘要: 针对泥页岩基质型页岩油有效开发面临的问题，以渤海湾盆地济阳坳陷沾化凹陷古近系沙河街组沙三下亚段典型含油泥页岩样品为例，开展了地层温度下密闭压裂改造后一定负压和超临界二氧化碳流体在不同压力条件下吞吐萃取可动油实验研究。实验结果揭示：地层温度与一定负压下仅微量轻质组分（< C₁₅）可流动；在相同地层温度与流体压力下，随着超临界二氧化碳流体吞吐作用时间增长，可动油主要组分的碳数呈现增高趋势；随着流体压力的增大，超临界二氧化碳吞吐萃取可动油量显著提高，不仅以游离态赋存的轻质油组分和中质油组分被有效萃取出来，而且部分以束缚态（吸附—互溶态）赋存的重质组分也被萃取出来。超临界二氧化碳技术在提高泥页岩基质型页岩油采收率领域具有广阔的应用前景。
- 超临界二氧化碳 /
- 地层温度 /
- 压力 /
- 泥页岩 /
- 页岩油 /
- 沙河街组 /
- 济阳坳陷
Abstract: Movable oil extraction experiments from the lower part of third member of Paleogene Shahejie Formation (Es₃^L) in the Zhanhua Sag of Jiyang Depression of Bohai Bay Basin were made to address problems on matrix shale oil exploitation. Various negative pressure and different supercritical carbon dioxide fluid pressures at strata temperature were used after fracturing in a closed system. Only traces of light hydrocarbons (< C₁₅) can flow at strata temperature and negative pressure. The carbon number of the main components of movable oil increases with extraction time with supercritical carbon dioxide under the same strata temperature and fluid pressure, and the contents of movable oil increase with fluid pressure increase. The light and medium weight hydrocarbon components in the free state are extracted effectively and some heavy hydrocarbon components in the bound-state (adsorption and miscible state) are also extracted. It suggests that the technology of supercritical carbon dioxide has a good prospect for improving recovery efficiency of matrix shale oil.
- supercritical CO₂ /
- strata temperature /
- pressure /
- shale /
- shale oil /
- Shahejie Formation /
- Jiyang Depression

HTML全文

图 1 实验样品制备、实验仪器与主要实验结果

Figure 1. Sample preparation, apparatus and main experiment results

下载: 全尺寸图片幻灯片

图 2 地层温度下不同流体压力、不同吞吐时间超临界二氧化碳萃取可动油全烃色谱图

Figure 2. Chromatogram of movable oil extracts from shale with supercritical carbon dioxide under different fluid pressures and huffing and puffing times

下载: 全尺寸图片幻灯片

表 1 实验原始样品与超临界二氧化碳萃取残样中不同赋存状态油定量表征结果对比

Table 1. Quantitative characterization of different occurrence state oils of original sample and residual samples after extraction with supercritical carbon dioxide mg/g

样品性质	多温阶热解参数
样品性质	S_1-1	S_1-2	S_2-1	S_2-2	总滞留油量
原始样品	0.59	7.15	5.70	6.59	13.44
130 ℃/10 MPa条件下吞吐萃取后残样	0.35	6.03	4.70	6.35	11.08
130 ℃/20 MPa条件下吞吐萃取后残样	0.10	2.97	4.55	6.12	7.52
130 ℃/30 MPa条件下吞吐萃取后残样	0.04	0.86	3.57	5.39	4.47

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表 2 地层温度不同流体压力下超临界二氧化碳萃取不同赋存状态油量与萃取率对比

Table 2. Extractive contents and ratios of different occurrence state oils with supercritical carbon dioxide under strata temperature and different fluid pressures

可动油萃取条件	S_1-1萃取量/(mg·g^-1)	S_1-1萃取率/%	S_1-2萃取量/(mg·g^-1)	S_1-2萃取率/%	S_2-1萃取量/(mg·g^-1)	S_2-1萃取率/%	S_2-2萃取量/(mg·g^-1)	S_2-2萃取率/%	总萃取量/(mg·g^-1)
130 ℃/10 MPa条件下吞吐萃取可动油构成	0.24	40.68	1.12	15.66	1.00	17.54	0.24	3.64	2.60
130 ℃/20 MPa条件下吞吐萃取可动油构成	0.49	83.05	4.18	58.46	1.15	20.18	0.47	7.13	6.29
130 ℃/30 MPa条件下吞吐萃取可动油构成	0.55	93.22	6.29	87.97	2.13	37.37	1.20	18.21	10.17

下载: 导出CSV

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