CO_2驱与埋存中流体运移监测方法与结果

Fluid Migration Monitoring in CO_2 EOR & Storage:Methodology and Results

针对吉林油田开展的大规模二氧化碳捕集与埋存(CCS)示范工程,设计并实施了油藏流体运移及驱替前缘监测项目,为后续方案的优化提供依据。监测内容包括储层物性测试、CO2分布监测、生产井监测三方面。储层物性测试方面,使用了气相示踪剂、压裂裂缝监测、试井方法,有效地反映了井间连通性及裂缝分布。CO2分布监测方面,使用了微地震前缘监测、大地电位监测,准确地描绘了CO2在储层中的分布状况。生产井监测方面,通过油、气、CO2产出量监测,直观地反映驱替前缘运移情况。不同的监测方法得到的结果基本吻合,验证了监测结果的准确性。

Jilin oilfleld is conducting a large scale CO2 capture and storage demonstration project. A monitoring program is designed and carried out to monitor the movement of fluids in reservoir, as well as to guide future work. The monitoring program includes three aspects, namely formation property test, CO2 distribution monitoring and production well monitoring. Gas Tracer, hydraulic fracturing monitoring and well test are used for formation proper- ty testing, which can effectively reveal inter-well connectivity and fracture distribution. Microseismic and electric spontaneous potential （ESP） measurements are used to show CO2 distribution in the reservoir. Production data are analyzed to investigate the movement of displacement front. The results of different monitoring techniques are com- pared to validate the effectiveness of the monitoring program.