CAJ | 학술논문

基于井筒环空气液两相流流型的分类及特点，建立适合于直井、斜井的井筒环空段塞流、环状流水动力学模型及环空流型过渡准则。基于井筒环空多相流特性，以液膜区域为控制单元，考虑油管膜、套管膜双层液膜的存在及气芯中液滴对质量、动量传递的影响，推导了环空段塞流、环状流质量、动量守恒方程，得到了段塞流与分散泡状流、泡状流及环状流间的流型过渡准则。根据已发表文献中的实验条件，采用本文模型与校正后的圆管模型预测了不同气、液相表观速度下的流型、持液率及压力梯度。结果表明：采用本文模型可以比较准确地预测环空流型、持液率及压降梯度，且预测持液率、压力梯度的准确性优于校正后的圆管模型。图4表6参26
기우정통배공기액량상류류형적분류급특점，건립괄합우직정、사정적정통배공단새류、배상류수동역학모형급배공류형과도준칙。기우정통배공다상류특성，이액막구역위공제단원，고필유관막、투관막쌍층액막적존재급기심중액적대질량、동량전체적영향，추도료배공단새류、배상류질량、동량수항방정，득도료단새류여분산포상류、포상류급배상류간적류형과도준칙。근거이발표문헌중적실험조건，채용본문모형여교정후적원관모형예측료불동기、액상표관속도하적류형、지액솔급압력제도。결과표명：채용본문모형가이비교준학지예측배공류형、지액솔급압강제도，차예측지액솔、압력제도적준학성우우교정후적원관모형。도4표6삼26
Based on the classification and flow behaviors of two phase flow in wellbore annuli, the hydraulic models for slug flow and annular flow in annuli for vertical or inclined wells were established, and the flow regime transition criteria were also obtained. Based on the flow behavior research of multiphase flow in wellbore annuli, the liquid film zone was used as the control volume, and the effect of the tubing liquid film, casing liquid film and the droplets in gas core area on the mass and momentum transfers were considered. The mass and momentum conservation equations of slug and annular flows were obtained. Then the evaluation criterion of flow pattern transitions were established, including dispersed flow to slug flow, bubble flow to slug flow and slug flow to annular flow. The model prediction results were compared under the experimental conditions from the previous literatures. The predictions of flow pattern, liquid holdup and pressure gradient were compared between the new model and the pipe flow model modified by using the hydraulic diameter. The results show that the flow pattern, liquid holdup and pressure gradient can be predicted by the new model more accurately, and the prediction of liquid holdup and pressure gradient are better.