Technologies and practice of CO2 flooding and sequestration in China

HU Yongle,HAO Mingqiang,CHEN Guoli,SUN Ruiyan,LI Shi

Table 5 CO2 flooding tests in the Jilin Oilfield.

Block Reservoir type Permea- bility/ 10-3 μm2 Well pattern Reserves/ 104 t Number of injectors and producers Cumulative CO2 injected/104 t HC pore volume multiple of injected CO2 Annual oil production capacity/104 t Hei-59 CO2 flooding in original oil reservoir 3.5 140 m×440 m, inverted-seven-spot 102 6 injectors, 25 producers 27.3 0.330 2.6 Expanded test in Hei-79 South Converting to CO2 flooding at mid-high water cut 19.8 160 m×480 m, inverted-nine-spot inverted-seven-spot 240 18 injectors, 60 producers 41.2 0.210 5.1 Short well spacing test in Hei-79 North Converting to CO2 flooding at super- high water cut 4.5 80 m×240 m, inverted-seven-spot 108 10 injectors, 27 producers 17.8 0.550 1.2 Large-scale application test in Hei-46 Large-scale application test 4.8 150 m×600 m, 212 m×424 m, inverted-nine-spot 671 26 injectors, 139 producers 32.6 0.076 4.4