CAJ | 학술논문

随着超长水平井施工排量和加砂量的不断增加，滑套球座冲蚀磨损日益严重。目前对液固两相流冲蚀磨损的研究较多，但均未考虑混合粒径固体颗粒对冲蚀磨损的影响。研究不同粒径混合的支撑剂对球座的冲蚀磨损，基于欧拉双流体理论，运用Fluent软件对混合粒径固体颗粒对滑套球座的冲蚀磨损进行数值模拟。结果表明：混合粒径固体颗粒与单一粒径固体颗粒对球座冲蚀磨损规律有所不同，单一粒径固体颗粒对球座冲蚀磨损速率随着粒径的增大而减小；混合粒径固体颗粒对球座冲蚀磨损速率不仅和支撑剂粒径有关，而且和不同粒径固体颗粒的比例有关，即冲蚀磨损速率随混合固体颗粒中小粒径固体颗粒比例的增大而表现出先减小后增大的趋势。模拟结果为水平井分段压裂材料的选择提供了依据。
수착초장수평정시공배량화가사량적불단증가，활투구좌충식마손일익엄중。목전대액고량상류충식마손적연구교다，단균미고필혼합립경고체과립대충식마손적영향。연구불동립경혼합적지탱제대구좌적충식마손，기우구랍쌍류체이론，운용Fluent연건대혼합립경고체과립대활투구좌적충식마손진행수치모의。결과표명：혼합립경고체과립여단일립경고체과립대구좌충식마손규률유소불동，단일립경고체과립대구좌충식마손속솔수착립경적증대이감소；혼합립경고체과립대구좌충식마손속솔불부화지탱제립경유관，이차화불동립경고체과립적비례유관，즉충식마손속솔수혼합고체과립중소립경고체과립비례적증대이표현출선감소후증대적추세。모의결과위수평정분단압렬재료적선택제공료의거。
As the construction displacement and sand amount of overlong horizontal well are increased continuously,the erosion wear of ball seat of pitching sliding sleeve is increasingly serious.There are many researches on the erosion wear of liquid?solid two?phase flow,but the influence of solid particles with mixed particle sizes to the erosion wear is not consid?ered at all.The erosion wear of ball seat by the prop?pant mixed with different particle sizes was studied.Based on the Euler two?fluid theory,the numerical simulation of the erosion wear of ball seat by mixed particle sizes was carried out with Flu?ent software.The results show that the erosion wear rule of ball seat is different caused by the solid particles with mixed particle sizes and the solid particles with single particle size.The erosion wear rate of ball seat by solid particles with single particle size is in inversely proportional to the particle size,while the erosion wear rate of ball seat by the solid particles with mixed particle sizes is related to the particle size and the volume ratio of the solid particles with different particle si?zes.With the increasing of the volume ratio of the solid particles with small particle sizes,the erosion wear rate of ball seat presents a trend of decreasing first, and then increasing. The simulated result provides a reference for the selection of staged fracturing material of horizontal well.