Rapid reactions between CO2, brine and silicate minerals during geological carbon storage: Modelling based on a field CO2 injection experiment
| Autor: | Mike J. Bickle, Chris J. Ballentine, Oliver Warr, Hazel J. Chapman, Tule Sirikitputtisak, Max Wigley, Niko Kampman, Benoît Dubacq, Albert Galy, Zheng Zhou |
|---|---|
| Přispěvatelé: | Institut des Sciences de la Terre de Paris (iSTeP), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut national des sciences de l'Univers (INSU - CNRS), Centre de Recherches Pétrographiques et Géochimiques (CRPG), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2017 |
| Předmět: |
Calcite
010504 meteorology & atmospheric sciences Geochemistry Alkalinity Mineralogy Geology engineering.material 010502 geochemistry & geophysics 01 natural sciences 6. Clean water chemistry.chemical_compound Permeability (earth sciences) chemistry 13. Climate action Geochemistry and Petrology [SDU]Sciences of the Universe [physics] Silicate minerals engineering Plagioclase Carbonate Enhanced oil recovery Dissolution 0105 earth and related environmental sciences |
| Zdroj: | Chemical Geology Chemical Geology, Elsevier, 2017, 468, pp.17-31. ⟨10.1016/j.chemgeo.2017.07.031⟩ |
| ISSN: | 0009-2541 |
| Popis: | International audience; The dissolution of CO 2 into formation brines and the subsequent reactions of the CO 2-charged brines with reservoir minerals are two key processes likely to increase the security of geological carbon-dioxide storage. These processes will be dependent on the permeability structure and mineral compositions of the reservoirs, but there is limited observational data on their rates. In this paper we report the cation and anion concentrations and Sr, oxygen and carbon isotopic compositions of formation waters from four extraction wells sampled at surface, over~6 months after commencement of CO 2 injection in a five spot pattern for enhanced oil recovery at the Salt Creek field, Wyoming. Sampled fluids, separated from the minor oil component, exhibit near-monotonic increases in alkalinity and concentrations of cations but little change in Cl and Br concentrations and oxygen and deuterium isotope ratios. The increases in alkalinity are modelled in terms of reaction with reservoir calcite and silicate minerals as the changes in fluid chemistry and Sr-isotopic compositions are inconsistent with simple addition of injected fluids sampled over the course of the experiment. The reservoir mineral chemical and isotopic compositions are characterised by sampling core as well as surface exposures of the Frontier Formation elsewhere in Wyoming. The evolution of the fluid chemistries reflects extensive dissolution of both carbonate and silicate minerals over the course of the six months sampling implying rapid dissolution of CO 2 in the formation waters and reaction of CO 2-bearing brines with formation minerals. Rates of CO 2 diffusion into the brines and advection of CO 2 charged brines in the reservoir are sufficiently slow that, if present, calcite should react to be close to equilibrium with the fluids. This allows estimation of the CO 2 partial pressures in the sampled fluids and comparison with the thermodynamic driving force for the relatively rapid average plagioclase dissolution rates of~10 − 12 mol•m − 2 •s − 1 . |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect