A modeling and numerical simulation study of enhanced CO 2 sequestration into deep saline formation: a strategy towards
- PDF / 2,933,820 Bytes
- 27 Pages / 439.37 x 666.142 pts Page_size
- 51 Downloads / 178 Views
A modeling and numerical simulation study of enhanced CO2 sequestration into deep saline formation: a strategy towards climate change mitigation Rashid Mohamed Mkemai 1
& Gong Bin
1
Received: 28 March 2019 / Accepted: 15 October 2019/ # Springer Nature B.V. 2019
Abstract
The net increase in anthropogenic carbon dioxide (CO2) emissions from fossil fuel combustion contributes significantly to the global warming and climate change. CO2 capture and storage (CCS) in geological formations, specifically in deep saline aquifers, is among the very promising strategies to control and mitigate emissions into the atmosphere. Injection of CO2 into a reservoir may result in the formation of pore pressure which can initiate cracks and trigger fault activities. CO2 may leak into the atmosphere and invade shallow groundwater sources. Release of CO2 into the atmosphere has enormous effects on the environment and significantly contributes to global climate change. Therefore, storage safety, injection efficiency, and monitoring remain crucially important considerations in CO2 injection. This study attempts to establish an optimal CO2 injection strategy that aims at enhancing CO2 storage with an increased safety at Ordos basin. Furthermore, it establishes the safety limits of CO2 plume migration from the central axis of the injection well. In the investigation, injection parameters such as injection rate and bottom hole pressure were analyzed. The CO2 plume migration analysis was performed, and migration limits were determined. Simulation results revealed that different formation layers have varying
Carbon dioxide (CO2) is an odorless, colorless gas made of a carbon atom covalently double bonded to two oxygen atoms. It naturally occurs in air as a trace gas at approximately 0.04% by volume. It has a density of around 0.6 kg/m3 higher compared to dry air. It acts as a greenhouse gas. CO2 capture and storage (CCS) involves separation, transportation, and permanent storage of CO2 resulting from large industries and energy sources for the purpose of isolating it from the Earth’s atmosphere. CO2 plume migration is an evenly upwards and lateral buoyant movement of an injected CO2 filling any trap encountered in the reservoir including stratigraphic and/or structural traps.
* Rashid Mohamed Mkemai [email protected]
1
Department of Petroleum Engineering, Faculty of Earth Resources, China University of Geosciences, Wuhan 430074 Hubei, People’s Republic of China
Mitigation and Adaptation Strategies for Global Change
storage capacities and pressure withstanding ability. The site maximum storage rate goal of storing 100,000 t of CO2 per year was attained. It is advised to perform injection at the Majiagou layer due to sufficient storage capacity and greater depth of over 2400 m from the surface. This study recommends that an optimum CO2 sequestration strategy which does not result into excessive migration of injected CO2 plume and limit formation pressure buildup should be adopted. Therefore, deep underground storage at an average d
Data Loading...
