CAJ | 학술논문

针对高速非达西动边界对产能影响的问题，开展了考虑高速非达西动边界影响的产能方程的建立。研究中采用渗流理论和惯性理论推导了高速非达西动边界公式和对应的产能方程。并基于对动边界的认识不仅提出了高速非达西出现的临界渗透率、临界产量和临界压差的概念，而且提出了高速非达西边界表皮因子。研究表明，只有储层渗透率、产量或者压差大于临界值时，储层中才可能出现高速非达西渗流；而且高速非达西边界表皮是渗透率、孔隙度、临界雷诺数以及β的函数反映了地层性质对高速非达西区域的影响，表皮越大则高速非达西区域越小，动边界的影响越不能忽略。最后与常规产能方程比较发现，渗透率在1～10 mD时，本文产能方程的IPR曲线与其有明显的差异。提出了高速非达西动边界对产能预测的影响，提高了产能预测的精度。
침대고속비체서동변계대산능영향적문제，개전료고필고속비체서동변계영향적산능방정적건립。연구중채용삼류이론화관성이론추도료고속비체서동변계공식화대응적산능방정。병기우대동변계적인식불부제출료고속비체서출현적림계삼투솔、림계산량화림계압차적개념，이차제출료고속비체서변계표피인자。연구표명，지유저층삼투솔、산량혹자압차대우림계치시，저층중재가능출현고속비체서삼류；이차고속비체서변계표피시삼투솔、공극도、림계뢰낙수이급β적함수반영료지층성질대고속비체서구역적영향，표피월대칙고속비체서구역월소，동변계적영향월불능홀략。최후여상규산능방정비교발현，삼투솔재1～10 mD시，본문산능방정적IPR곡선여기유명현적차이。제출료고속비체서동변계대산능예측적영향，제고료산능예측적정도。
To better understand the effect of the non-Darcy flow moving boundary,the effect of non-Darcy flow near wellbore caused by high velocity on productivity prediction was studied. Based on seepage theory and inertial theory,the non-Darcy moving boundary equation and a new deliverability equation are derivated. Then we proposed the concepts of critical perme-ability,critical productivity and critical pressure,and the non-Darcy boundary skin factor. Only when permeability,gas rate and pressure are all larger than critical value,non-Darcy flow appears. And a non-Darcy moving boundary skin factor is a function of permeability,porosity,critical Reynolds number andβexpressions,which reflects the effect of the petrophysical properties. And the larger the skin is,the narrower the moving boundary is and the greater its effect. Finally,a comparison with conventional deliverability equation revealed that,if the permeability range is 1～10 mD,significant differences exist in these IPR curves. This paper proposed the effect of non-Darcy flow moving boundary on production prediction,which improve the accuracy of the productivity prediction.