Jizan CO2 mineralization pilot in Saudi Arabia

This repository contains data from the Jizan pilot study demonstrating the feasibility of mineral carbon storage in the basalts of the Jizan region. The project achieved subsurface carbon mineralization by injecting water-dissolved CO₂, a method that enhances safety and efficiency by creating a dense, non-buoyant fluid and accelerating the reactivity of the host rock.

Key operational highlights:
- A closed-loop water circuit between an injection well and a production well (Mar 2023 - Apr 2024).
- Continuous CO₂ injection (May-July 2023) delivered 131 tons of CO₂.
- Tracer tests revealed a dual-porosity subsurface with fast fracture flow and a slower matrix.

Evidence for mineralization:
- A significant drop in dissolved carbon, alongside rising cation levels, indicates subsurface carbonation reactions.
- Carbonate minerals found on a recovered pump were isotopically linked to the injected CO₂.
- Conservative tracer analysis confirms ~70% of injected CO₂ was mineralized within ten months.

本仓库收录了吉赞试点研究的相关数据，该研究验证了在吉赞地区玄武岩中开展矿物碳封存的可行性。本项目通过注入溶解于水的二氧化碳实现地下碳矿化，该方法可形成致密且无浮力的流体，提升反应安全性与效率，同时加速宿主岩石的反应活性。

关键操作亮点：
- 2023年3月至2024年4月期间，在注入井与生产井之间搭建闭环水循环回路。
- 2023年5月至7月持续注入二氧化碳，累计注入量达131吨。
- 示踪剂测试揭示地下为双重孔隙介质，存在快速裂缝渗流与缓慢的基质渗流。

矿化验证证据：
- 溶解态碳含量显著下降，同时阳离子浓度上升，表明地下发生了碳酸化反应。
- 回收的泵体表面发现的碳酸盐矿物，其同位素特征与注入的二氧化碳具有关联性。
- 保守型示踪剂分析证实，在注入后的10个月内，约70%的注入二氧化碳已完成矿化。