莺−琼盆地咸水层二氧化碳地质封存适宜性及潜力评价

廖晋; 金澳涵; 李才; 王全荣

doi:10.19509/j.cnki.dzkq.tb20240366

莺−琼盆地咸水层二氧化碳地质封存适宜性及潜力评价

doi: 10.19509/j.cnki.dzkq.tb20240366

廖晋^1,,
金澳涵²,
李才¹,
王全荣^2, ,

1.
中海石油（中国）有限公司海南分公司，海口 570100
2.
中国地质大学（武汉）环境学院，武汉 430078

基金项目: 中国海洋石油有限公司南海油气能源院士工作站综合科研项目（KJZH-2023-2203）；海南省科技专项（ZDYF2024GXJS037）

详细信息

作者简介:
廖晋：E-mail：liaoj@cnooc.com.cn

通讯作者:
E-mail：wangqr@cug.edu.cn

中图分类号: X701；P75
计量
- 文章访问数: 199
- PDF下载量: 21
- 被引次数: 0
出版历程
- 收稿日期: 2024-06-30
- 录用日期: 2025-03-03
- 修回日期: 2024-08-31
- 网络出版日期: 2025-03-03

Suitability and potential evaluation of geological storage of carbon dioxide in saline aquifers of Ying-Qiong Basin

LIAO Jin^1
,,
JIN Aohan²,
LI Cai¹,
WANG Quanrong^{2
, ,}

1.
CNOOC Limited Hainan, Haikou 570100, China
2.
School of Environment Studies, China University of Geosciences (Wuhan), Wuhan 430078, China

More Information

Author Bio:
E-mail：liaoj@cnooc.com.cn

Corresponding author: E-mail：wangqr@cug.edu.cn

摘要

摘要:
二氧化碳（CO₂）过量排放造成全球气候多变，进而引发一系列生态环境问题，作为减少CO₂排放的关键技术，碳捕集、利用和封存（CCUS）在实现CO₂大规模减排中发挥重要作用。中国近海盆地咸水层CO₂封存项目的应用前景广阔，封存潜力巨大。针对莺−琼盆地咸水层CO₂封存有利层系和封存潜力认识不清等问题，基于莺−琼盆地的地质特征，通过计算指标组成权重和适宜性得分对莺−琼盆地开展了CO₂地质封存适宜性评价。此外，结合数值模拟方法计算的不同层系CO₂有效封存系数，采用不同的封存潜力计算方法，对莺−琼盆地咸水层的CO₂封存潜力进行了评价。结果表明，欧盟（EC）方法计算的CO₂封存容量要略小于美国能源部（USDOE）和碳收集领导人论坛（CSLF）方法得出的封存容量。由于CSLF方法考虑了构造封存、残余气封存和溶解封存等封存机制，其结果更符合实际情况。综上所述，莺歌海盆地和琼东南盆地咸水层的CO₂封存潜力分别为7.96×10¹⁰和4.40×10¹⁰ t，莺−琼盆地咸水层总的CO₂封存潜力为1.24×10¹¹ t，进一步验证了莺−琼盆地咸水层CO₂封存工业规模试点和示范项目的巨大潜力，为开展莺−琼盆地咸水层CO₂地质封存场地选址提供了依据。
- CO₂地质封存 /
- 莺−琼盆地 /
- 适宜性评价 /
- 数值模拟 /
- 封存潜力评价 /
- 咸水层
Abstract: Objective
Excessive carbon dioxide (CO₂) emissions have led to global climate variability, resulting in a series of environmental challenges. As a critical technology for reducing CO₂ emissions, carbon capture, utilization, and storage (CCUS) plays a significant role in mitigating large-scale CO₂ emissions. The application of CO₂ storage in saline aquifers, particularly in offshore China, offers promising prospects with substantial technical and economic potential.
Methods
To address the uncertainties regarding favorable areas and CO₂ storage potential in saline aquifers of Ying-Qiong Basin, this study evaluates the geological suitability for CO₂ storage by calculating the weights of key components and the suitability score based on the basin's geological characteristics. Additionally, the CO₂ storage potential is assessed using effective CO₂ storage coefficients obtained through numerical simulation and various storage potential calculation methods.
Results
The results indicate that the storage capacity determined by the EC method is lower than that obtained using the USDOE and CSLF methods. Since the CSLF method accounts for storage mechanisms such as geological structure storage, residual gas storage, and dissolution storage, its results are more reasonable. The CO₂ storage potential in saline aquifers of Ying-Qiong Basin and Qiongdongnan Basin is estimated to be 7.96×10¹⁰ and 4.40×10¹⁰ t, respectively. The total CO₂ storage potential in Ying-Qiong Basin's saline aquifers is 1.24×10¹¹ t, further confirming the significant potential for industrial-scale pilot and demonstration projects.
Conclusion
This provides a solid foundation for future CO₂ storage initiatives in saline aquifers of Ying-Qiong Basin.
- CO₂ geological storage /
- Ying-Qiong Basin /
- suitability evaluation /
- numerical simulation /
- storage potential evaluation /
- saline aquifer

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图 1 莺−琼盆地构造区划图

Figure 1. Tectonic division map of Ying-Qiong Basin

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图 2 莺−琼盆地地层分布图

Figure 2. Stratigraphic distribution map of Ying-Qiong Basin

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图 3 不同层系储集体网格剖分示意图

Figure 3. Grid distribution diagram of reservoirs in different formations

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表 1 莺−琼盆地主要储层物性参数^[25，28]

Table 1. Physical parameters of major reservoirs of Ying-Qiong Basin

盆地	主要储层	平均孔隙度	平均渗透率/ 10⁻³ μm²	净毛比	地层厚度/m
莺歌海	莺歌海组	0.22～0.25	3.6～274.5	0.13	1270～3300
琼东南	莺歌海组−黄流组	0.15～0.225	11.7	0.13	473～3576
	梅山组−三亚组	0.16～0.18	2.3～1000	0.26	200～3000
	陵水组	0.13～0.16	69～111	0.28	100～4600

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表 2 莺−琼盆地咸水层CO₂地质封存适宜性评价^[29-30]

Table 2. Suitability evaluation for CO₂ geological storage in saline aquifers of Ying-Qiong Basin

指标层	权重	指标亚层	权重	指标组成	权重
地质特征	0.2164	地壳稳定性	1.0	断裂特征	0.1434
				断裂封闭性	0.5246
				地震	0.2390
				火山	0.0930
储盖特征	0.6434	储层特征	0.4545	岩性	0.1111
				储层深度	0.2222
				储层厚度	0.2222
				孔隙度	0.2222
				渗透率	0.2223
		储盖组合	0.0910	—	—
		盖层特征	0.4545	岩性	0.3333
				分布连续性	0.3333
				单层厚度	0.1667
				累计厚度	0.1667
地温特征	0.0449	地温梯度	0.50	—	—
地温特征	0.0449	地热流值	0.50	—	—
社会经济特征	0.0953	勘探程度	0.50	—	—
社会经济特征	0.0953	基础条件	0.50	—	—

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表 3 莺−琼盆地咸水层CO₂地质封存适宜层系的封存量计算参数^[25，28]

Table 3. Parameters of CO₂ geological storage suitable formation in saline aquifers of Ying-Qiong Basin

计算参数	莺歌海盆地	琼东南盆地
计算参数	莺歌海组	莺歌海组− 黄流组	梅山组− 三亚组	陵水组
净毛比	0.13	0.13	0.26	0.28
平均孔隙度	0.23	0.185	0.17	0.145
储层体积/km³	153069	46710	43135	4051
地层温度/℃	92	80	100	120
地层压力/Mpa	21.6	24	30	36
CO₂密度/(kg·m⁻³)	559.03	653.93	635.04	654.87
CO₂溶解度/(mol·L⁻¹)	1.032	1.178	1.270	1.362

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表 4 莺−琼盆地CO₂封存潜力评价结果

Table 4. Results of CO₂ storage potential of Ying-Qiong Basin

盆地	有利层系	咸水层CO₂总的有效封存量/t
盆地	有利层系	EC	USDOE	CSLF
莺歌海	莺歌海组	5.57×10¹⁰	7.16×10¹⁰	7.96×10¹⁰
琼东南	莺歌海组−黄流组	9.11×10⁹	1.10×10¹⁰	1.30×10¹⁰
	梅山组−三亚组	2.13×10¹⁰	2.30×10¹⁰	2.79×10¹⁰
	陵水组	2.61×10⁹	2.48×10⁹	3.14×10⁹
莺−琼	—	8.87×10¹⁰	1.08×10¹¹	1.24×10¹¹
注：EC. European Commission，欧盟计算方法；USDOE. United States Department of Energy，美国能源部计算方法；CSLF. Carbon Sequestration Leadership Forum，碳收集领导人论坛计算方法

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