| 摘要: |
| 根据水平井及大斜度井砾石充填机制与过程,考虑地层滤失、井筒倾斜、筛管偏置等特殊情况，建立水平井及 大斜度井管内砾石循环充填试验模拟装置。利用该试验装置模拟水平井及大斜度井管内砾石循环充填全过程，分 析a波及P波充填前沿特征，研究井筒倾角、筛管偏置度、流量、砂体积分数对充填动态及cx波砂床平衡高度的影响 规律及机制。试验结果表明:cx波充填前沿在低流量下规则稳定，在高流量下形状不规则;《波充填结束前沉积砂床 平衡高度会整体升高，导致P波充填空间较小;筛管偏置度与井筒倾角对充填动态有明显影响，井筒倾斜会降低砂 床平衡高度，而筛管偏置则会加剧沉积砂床的形成并增大平衡高度;流量、砂体积分数是影响a波充填动态的直接 因素。 |
| 关键词: 水平井 大斜度井 砾石充填 a波 p波 砂床平衡高度 试验模拟 |
| DOI：10.3969/j.issn.1673-5005.2010.02.015 |
| 分类号:TE 257 |
| 基金项目:国家“863”计划项目(2006AA09Z351);国家自然科学基金项目(50704035) |
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| Experimental simulation of gravel-packing in horizontal and highly deviated wells |
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DONG Chang-yin, WU Long, WANG Ai-ping, LIU Chun-miao, ZHANG Qi
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(College of Petroleum Engineering in China University of Petroleum, Dongying 257061, China)
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| Abstract: |
| According to the mechanism of gravel-packing in horizontal and highly deviated wells, an integral experimental system for inside-casing gravel-packing simulation was set up considering such complicated characteristics as carrier fluid loss off，wellbore deviating, screen bending. This experimental system can be used to simulate the whole a and (3 wave process of gravel-packing in horizontal and highly deviated wells. By a series of simulation experiments, a and p wave forehead characteristics were observed obviousily. The influences of wellbore deviating, screen bending, flow rate, sand volume fraction on the packing performance and a wave sand bed height were analyzed. The experimental results indicate that a wave forehead is steady with low flow rate and not so regular with high flow rate. The space volume for p wave packing is very small ordinary. The wellbore deviating to the horizontal line tends to decrease a wave bed equilibrium height and screen bending accelerates the forming of a wave bed. Flow rate and sand volume fraction are the main two factors affecting the gravel-packing performance in horizongtai and highly deviated wells directly. |
| Key words: horizontal well highly deviated well gravel-packing a wave P wave sand bed equilibrium height experimental simulation |
