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综合科研项目“莺−琼盆地CO₂与地热能综合利用关键技术研究”（KJZH-2023-2203）；海南省重点研发定向征集项目“莺−琼盆地CO₂地质封存关键技术研究”（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

计量
- 文章访问数: 144
- PDF下载量: 13
- 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 aquifer 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，本研究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，EC方法计算的CO₂封存容量要略小于USDOE和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，这进一步验证了莺−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
Abstract: Objective
Excessive carbon dioxide (CO₂) emissions have caused global climate variability, leading to a series of environmental problems. As a key technology to reduce CO₂ emissions, carbon capture, utilization and storage (CCUS) plays an important role in relieving large-scale CO₂ emission reductions, and the application of CO₂ storage projects for the saline aquifer in offshore China has a broad application prospect and great technical and economic potential.
Methods
To address the problem of unclear understanding of the favorable areas and storage potential of CO₂ in the saline aquifers in the Ying-Qiong Basin, the suitability evaluation of geological storage of CO₂ is carried out by calculating the weights of the indicator components and the suitability score based on the geological characteristics of the Ying-Qiong Basin. In addition, the CO₂ storage potential of the saline aquifer in the Ying-Qiong Basin is preliminarily evaluated by combining the effective CO₂ storage coefficients calculated by numerical simulation method and different storage potential calculation methods.
Results
Results show that the storage capacity obtained from EC method is less than that determined by the USDOE and CSLF methods. Since the CSLF method considers the storage mechanisms such as geological structure storage, residual gas storage and dissolution storage, the results seem more reasonable.
Conclusion
In summary, the CO₂ storage potentials of the saline aquifer in the Yinggehai Basin and Qiongdongnan Basin are 7.96×10⁶ and 4.40×10⁶ million tons, respectively, and the total CO₂ storage potential in the saline aquifer in the Ying-Qiong Basin is 1.24×10⁷ million tons, which further verifies the great potential of the industrial-scale pilot and demonstration projects of CO₂ storage in the saline aquifer of the Ying-Qiong Basin and provides a good opportunity for the next step of carrying out the CO₂ storage project in the saline aquifer of the Ying-Qiong Basin.
- CO₂ geological storage /
- Ying-Qiong Basin /
- suitability evaluation /
- numerical simulation /
- storage potential evaluation

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图 1 莺−琼盆地构造区划图

Figure 1. Structural division map of Ying-Qiong Basin

下载: 全尺寸图片幻灯片

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 formation

下载: 全尺寸图片幻灯片

表 1 莺−琼盆地主要储层物性参数^[25，28]

Table 1. List of physical parameters of major reservoirs in the 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
莺歌海盆地	莺歌海组	0.22～0.25	3.6～274.5	0.13	1270～3300
琼东南盆地	莺歌海−黄流组	0.15～0.225	11.7	0.13	473～3576
	梅山−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

下载: 导出CSV

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 table for CO₂ geological storage in saline aquifers of the 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 the 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−黄流组	梅山−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 the Ying-Qiong Basin

盆地	有利层系	EC/t	USDE/t	CSLF/t
莺歌海盆地	莺歌海组	5.57×10¹⁰	7.16×10¹⁰	7.96×10¹⁰
琼东南盆地	莺歌海−黄流组	9.11×10⁹	1.10×10¹⁰	1.30×10¹⁰
	梅山−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−琼盆地	—	8.87×10¹⁰	1.08×10¹¹	1.24×10¹¹

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