Change of phase state during multi-cycle injection and production process of condensate gas reservoir based underground gas storage

TANG Yong,LONG Keji,WANG Jieming,XU Hongcheng,WANG Yong,HE Youwei,SHI Lei,ZHU Huayin

Table 2 Formation fluid composition when gas storage was built (4 MPa).

Component Mole fraction of formation gas/% Mole fraction of formation oil/% CO2 0.68 0.16 N2 1.45 0.11 C1 79.69 11.58 C2 10.86 4.37 C3 4.48 4.07 iC4 0.33 0.56 nC4 0.17 0.34 iC5 0.34 1.34 nC5 0.05 0.24 C6 0.28 2.36 C7 1.15 19.09 C8 0.33 10.05 C9 0.14 8.15 C10 0.07 7.80 C11+ 0 29.81