1.成都理工大学 环境与土木工程学院，成都610059;2.中地国际工程有限公司，北京100093;3.地质灾害防治与地质环境保护国家重点实验室，成都 610059
饶杰（2001—），男，主要从事地下水与多相流方向研究，（E-mail）1720966377@qq.com。
谢健（1978—），男，博士，（E-mail）ljfok@sina.cn。
TE31;X701
国家留学基金委西部计划项目（20210815016）；国家自然科学基金面上项目（41472275）。
1.College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu610059, P. R. China;2.China Geo-Engineering Corporation International Ltd., Beijing100093, P. R. China;3.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu610059, P. R. China
Supported by China Scholarship Council-‘for Academic Visitors from Western China’(20210815016), and the General Program of National Natural Science Foundation of China(41472275).
盐水含水层CO2埋存能力是关乎中国实现碳中和目标的基础问题。四川盆地作为中国西南地区重要的油气产地，其深部盐水含水层的CO2埋存前景尚缺乏比较深入的定量研究。三叠系雷口坡组（T2l）是四川盆地的优质卤储层，其四段（T2l4）、三段（T2l3）、一段（T2l1）可作为CO2埋存的目标储层。基于多井并注超压解析解，采用MATLAB语言脚本CO2BLOCK，评估了雷口坡组深部盐水含水层的CO2埋存能力。结果表明：在连续注入CO2 30 a的条件下，四川盆地雷口坡组储层的CO2埋存能力为0.83 Gt，以雷口坡组四段的埋存能力最大，雷口坡组一段的埋存能力最小。雷口坡组四段、三段、一段的单井最大可持续注入速率分别为0.550、0.051、0.054 Mt/a，对应的最大可持续超压分别为3.09、5.67、6.55 MPa。T2l4、T2l3和T2l1这3个储层的经济最优方案（井数/口，井距/km）分别为：（16，17）（20，17）（16，19），经济最优方案对应的埋存容量分别为0.50、0.07、0.04 Gt。
Assessing CO2 storage capacity in saline aquifers is fundamental to supporting China’s carbon neutrality goals. The Sichuan Basin, an important oil and gas production area in southwest China, lacks in-depth quantitative research on CO2 storage potential in its deep saline aquifers. The Leikoupo Formation(T2l) is a high-quality brine reservoir within the Sichuan Basin, with its fourth(T2l4), third (T2l3), and first(T2l1) members identified as target reservoirs for CO2 sequestration. This study utilizes an analytical solution to assess overpressure induced by multiwell simultaneous injection, and applies the MATLAB-based script CO2BLOCK to evaluate the CO2 storage potential of deep saline aquifers in the Leikoupo Formation. Results show that under a 30-year continuous CO2 injection scenario, the CO2 storage capacity of the Leikoupo Formation reservoir in the Sichuan Basin is 0.83 Gt, with the fourth member showing the highest capacity and the first member the lowest. The maximum sustainable injection rates per well for the fourth, third and first members are 0.550 Mt/a, 0.051 Mt/a and 0.054 Mt/a, with corresponding maximum sustainable overpressures of 3.09 MPa, 5.67 MPa and 6.55 MPa, respectively. The optimal economic configurations (number of wells, well spacing in kilometers) for T2l4, T2l3 and T2l1 are (16, 17) (20, 17) and (16, 19), respectively, with storage capacities of 0.50 Gt, 0.07 Gt and 0.04 Gt under these configurations.
饶杰,谢健.四川盆地雷口坡组盐水含水层
