Preliminary CO2 Project Implementation Priority with Multicriteria Analysis Approach using CO2 Source-Sink Networking Models in Pertamina EP Fields

Abstract

The needs of CO2-Enhanced Oil Recovery (EOR) implementation in Indonesia become much more important as Indonesia have abundant sources of CO2, while the state of national oil production declining from year to year. In this study, the ranking for various CO2-EOR suitable field candidate which owned by Pertamina EP will be determined and can be used further to make priority for CO2-EOR implementation.

The ranking is determined by using multicriteria analysis with scoring and weighting method based on modified EOR screening parameter such as API gravity, Remaining in Place, CO2 single source’s distance to the candidates, rate of CO2 sources near the candidates, infrastructures, and CO2 injection methods. Each parameter is shown with a number representing the assessed relative weight of that factor in comparison to other factors by using Pareto Chart. In the scoring and weighting analysis, each parameter was given the score of 5 (Class C), 3 (Class B), and 1 (Class A) with each parameter have different relative weight based on Pareto analysis that have been conducted. Then, the ranking can be determined from the total score from each parameter
for every field candidate.

The results given by 24 selected field candidates give 5 Fields with high priority for CO2-EOR. The high priority fields mainly influenced by remaining in place value and the availability of CO2 source surrounding the fields. CO2 source which have high CO2 rate come from power plant with the average rate more than 3,000 tonnes per day, followed by Gas Plant and Fields which produce gas with high CO2 content. From the results, it could be used as preliminary method to prioritize CO2-EOR implementation project for Pertamina EP in Indonesia. However, this study has not yet considered the economic analysis which is very important to be conducted before CO2-EOR project implementation.