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SPANISH GENERAL ACCOUNTING PLAN

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Geochemical – Geochemical surveys that monitor the reservoir characteristics have routinely been used in the oil and gas industry and have been successfully adopted for use in monitoring carbon sequestration. Initially, reservoir samples (solids, liquids, and gases) are collected to establish a baseline prior to CO2 injection; tests can be repeated later to monitor CO2 migration (using tracers), or to assess geochemical changes, as CO2 saturated brine reacts with the reservoir formation. Production fluid sampling and geochemical analyses were conducted at Weyburn at regular intervals of three to four months over a three year period, with the primary objective of tracing the distribution of CO2 over time within the reservoir. The fluids were analyzed for.