These correlations can be used to estimate the foam rheology for quality less than 60%. For higher quality, the influence of pressure needs to be considered. The effect of pressure on n and K can be captured by the following correlations:
equation(24)
View the MathML source
Turn MathJax on
equation(25)
K(p,Q)=K0(Q)+(8.6×10−11e21Q)[P−1000]
Turn MathJax on
where P is the pressure, and n0, K0, are power law parameters predicted by Eqs. (22) and (23). The correlations are shown as lines in Fig. 13 and Fig. 14. The foam quality range normally used in conventional reservoirs is 70–95%. Lower quality foam can be used in shales.
Our test equipment is limited to temperatures below 150 °F and pressures below 2000 psi, which is relevant to shallow formations. The correlations are still good approximations at higher pressures for foam quality lower than 60% because pressure has negligible impact on foam rheology based on the previous discussion. For foam quality higher than 60%, one can extrapolate the correlations for n and K to higher pressures. The extrapolations should be validated by lab experiments at high pressures.
These correlations can be used to estimate the foam rheology for quality less than 60%. For higher quality, the influence of pressure needs to be considered. The effect of pressure on n and K can be captured by the following correlations:equation(24)View the MathML sourceTurn MathJax onequation(25)K(p,Q)=K0(Q)+(8.6×10−11e21Q)[P−1000]Turn MathJax onwhere P is the pressure, and n0, K0, are power law parameters predicted by Eqs. (22) and (23). The correlations are shown as lines in Fig. 13 and Fig. 14. The foam quality range normally used in conventional reservoirs is 70–95%. Lower quality foam can be used in shales.Our test equipment is limited to temperatures below 150 °F and pressures below 2000 psi, which is relevant to shallow formations. The correlations are still good approximations at higher pressures for foam quality lower than 60% because pressure has negligible impact on foam rheology based on the previous discussion. For foam quality higher than 60%, one can extrapolate the correlations for n and K to higher pressures. The extrapolations should be validated by lab experiments at high pressures.
การแปล กรุณารอสักครู่..
