CAJ | 학술논문

基于高速非达西渗流新模型,建立了考虑井筒储存和表皮系数的均匀介质和双重介质试井模型,并采用有限差分求解.结果表明,无论是均匀介质还是双重介质,考虑高速非达西渗流后,压力曲线上移,压力导数曲线驼峰高度增加并后移,水平段出现的时间延迟.与Forchheimer模型相比,新模型的上升幅度要小.Kmr和τD是决定曲线形态的重要参数,随着τD增大和Kmr减小,压力导数曲线驼峰高度增加幅度增大,压力曲线上移幅度增大.阐述了高速非达西渗流压力降落试井和压力恢复试井的不同,给出了高速非达西渗流压力恢复试井的一种简单解释方法.
기우고속비체서삼류신모형,건립료고필정통저존화표피계수적균균개질화쌍중개질시정모형,병채용유한차분구해.결과표명,무론시균균개질환시쌍중개질,고필고속비체서삼류후,압력곡선상이,압력도수곡선타봉고도증가병후이,수평단출현적시간연지.여Forchheimer모형상비,신모형적상승폭도요소.Kmr화τD시결정곡선형태적중요삼수,수착τD증대화Kmr감소,압력도수곡선타봉고도증가폭도증대,압력곡선상이폭도증대.천술료고속비체서삼류압력강락시정화압력회복시정적불동,급출료고속비체서삼류압력회복시정적일충간단해석방법.
Based on a new model which describes the high-velocity non-Darcy fluid flow,well testing models about homoge-neous and double medium were established considering the wellbore storage and skin effect. Then,all the models were solved by finite difference method. Results show that when considering the high-velocity non-Darcy flow,the pressure curves will move up and the pressure derivative curves will have a transportation hump and move back,time delay appear in the horizontal section. Compared with the Forchheimer model,the curves of the new model have smaller upward movement. Kmr andτD are two significant factors to determine both pressure and pressure derivative curves morphology. The transportation hump of the pressure curves increases with the decrease of Kmr and increase ofτD and the pressure derivative curves have a bigger upward movement. At last,the difference between the drawdown test and build-up test based on high-velocity Non-Darcy flow is clarified and a simple interpretation method is given for buildup test.