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孔隙度和渗透率是评价储集层物性的重要参数,自然是精细储集层预测不应缺少的组成部分。 孔隙度和渗透率一般采用理论计算或由岩心资料建立的图版计算。周清庄油田缺乏岩心分析资料,只能采用理论计算方法,所用公式为: φ=((Δt-Δt_M)/(Δt_F-Δt_M)C_P)-SH((Δt_(SH)-Δt_M)/(Δt_F-Δt_M)) Z=10~6ρ/Δt ρ=0.31v~(0.25) K=0.136φ~(4.4)/S_i~2式中 Δt——声波时差测井值,μs/m;C_P——压实系数;SH——储集层泥质含量,f;Δt_M,Δt_F,Δt_(SH)——岩石骨架、孔隙流体和泥质的声波时差,μs/m;Z——波阻抗,kg/(m~2·s);ρ——密度测井值,g/cm~3;v——速度,m/μs;S_i——束缚水饱和
Porosity and permeability are important parameters for evaluating reservoir physical properties and are naturally an integral part of fine reservoir prediction. Porosity and permeability are generally calculated using theoretical calculations or plates created from core data. The data of core analysis in Zhouqingzhuang Oilfield are lacking, only the theoretical calculation method can be used, and the formula is: φ = (Δt-Δt_M) / (Δt_F-Δt_M) C_P) -SH (Δt_ (SH) -Δt_M) / (Δt_F-Δt_M )) Z = 10 ~ 6ρ / Δt ρ = 0.31v ~ (0.25) K = 0.136φ ~ (4.4) / S_i ~ 2 where Δt is the acoustic logging value, μs / m; C_P- ; SH - shale content of reservoir, f; Δt_M, Δt_F, Δt_ (SH) - sonic time difference of rock skeleton, pore fluid and shale, μs / m; 2 · s); ρ - density log, g / cm ~ 3; v - velocity, m / μs; S_i - irreducible water saturation