Fig. 1

Top map with contour line of M10 reservoir"

Fig. 2

NS reservoir profile (a) and WE cross well section (b) with Gamma Ray (GR) logs for M10 reservoir"

Fig. 3

Grids of M10 structural model"

Fig. 4

Well section for M10 reservoir with logging interpretation results. Curves from left to right are GR, sub-facies, permeability and porosity, respectively. GR data of #1 were based on Peng et al (2013) and the other five GR curves are based on the General Editorial Committee of Oil and Gas Field Development in China (2013). The black horizontal dotted line marks the top and bottom of M10 reservoir"

Tab.1

Comparison of main parameters between M10 model and experiment data"

Fig. 5

3D model of porosity (a) and permeability (b) for M10 reservoir with z direction extended 10 times"

Tab.2

Lumping and mole fraction of the 8-component oil system for M10 model"

Fig. 6

Results of 1D slim tube simulation"

Fig. 7

Relative permeability curves of oil-gas-water phases and capillary curves based on field data (a) and modified process (b). Pcow is oil-water capillary pressure, Krw is relative permeability of water, Krow is oil relative water permeability, Pcog is gas-liquid capillary pressure, Krg is relative permeability of gas, and Krog is oil relative to gas permeability"

Fig. 8

History matching and production predicting curves of M10 component model. Individual data points are field production data based on the General Editorial Committee of Oil and Gas Field Development in China (2013), and the dotted line is matching results of numerical modeling"

Fig. 9

Contour maps of simulated results. Oil saturation distribution in 1990 (a) and at the beginning of CO2 injection in 2016 (b). The black dots represent production wells with two designed CO2 injection wells of I1 and I2. The CO2-EOR-S simulated process begun in September 2016 after injection wells were opened"

Fig. 10

Curves of average formation pressure (a), recovery ratio (b) and CO2 storage (c) for nine cases"

Tab.3

CO2 injection settings"

Tab.4

CO2 sequestration queuing of nine cases"

Fig. 11

Curves of CO2 storage mass and oil recovery factor for nine cases"

Fig. 12

Recovery factor, water cut and cumulative oil production curves of C3 case. The black line means stimulated results of CO2 injection, and the grey line is a reference with no CO2 injected. The curves of oil recovery factor, water cut and cumulative oil production correspond to long dashed, short dotted and solid lines, respectively"