ガスEORプロジェクト－生産・操業から得られた知見と教訓－

抄録

JX NOEX（JX Nippon Oil & Gas Exploration Corporation）has accumulated its expertise regarding Carbon Capture, Utilization, and Storage（CCUS）and Gas EOR through worldwide projects. The Petra Nova CCUS projecvt was sanctioned in July 2014 and the CO₂ capture and injection system was completed in December 2016, and followed by EOR oil production in February 2017. The hydrocarbon gas enhanced oil recovery（HCG-EOR）for Rang Dong Field, within Block 15-2 offshore Vietnam, started to be investigated from 2008 to maximize oil recovery. After the executions of feasibility studies, pilot test and installations of facilities, the project of HCG-EOR full field scale started in October 2014.

Three common issues have arisen after implementation of gas EOR operation in both projects;（1）sand production（2） back pressure increase by gas breakthrough（3）injectivity reduction. And the several countermeasures were put in place to manage these issues and to maintain stable oil production.

This paper presents the outline of the lessons learned from the actual operation of CCUS and HCG-EOR full field scale and the approach for further production optimization.