As part of potential work in a CO_2 sequestration project, several flow assurance related issues were evaluated. Of particular importance were issues that impacted design decisions and operability for wells, pipeline, and facilities. In this work, the major design impacts were compressor discharge pressure, dehydration requirements of the injected CO_2, hydrate mitigation at the wellhead, and placement of safety valves in the wells. In addition to these main design decisions, flow assurance also played a role in developing key operating strategies. These included: 1) pipeline blowdown impacting material integrity, 2) hydraulics analysis for required number of wells, 3) thermal performance of the system for both materials issues and hydrate management, 4) fluid hammer impacts due to rapid valve closure. Finally, to complete this effort, various tools were employed which had to be assessed for their applicability and accuracy in both the steady state and transient system performance.
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