文章摘要
缓膨颗粒对塔河油田缝洞型油藏的调堵机理分析*
Analysis on Mechanism of Blocking and Profile Control of Slow-expanding Particles to Fracture-vuggyReservoirs in Tahe Oilfield
  
DOI:10.19346/j.cnki.1000-4092.2020.02.011
中文关键词: 缝洞型油藏  缓膨颗粒  油水选择性  调堵机理  塔河油田
英文关键词: fracture-vuggy reservoir  slow-expanding particle  oil-water selectivity  blocking and profile control mechanism  Tahe oilfield
基金项目:国家重大科技专项“缝洞型油藏堵调及靶向酸压工艺技术”(项目编号2016ZX05014-005)。
作者单位
李 亮1,2,张汝生3,伍亚军1,2,武俊文3,柳建新4 (1. 中国石化西北油田分公司石油工程技术研究院新疆 乌鲁木齐 8300112. 中国石化缝洞型油藏提高采收率重点实验室新疆 乌鲁木 齐 8300113. 中国石化石油勘探开发研究院北京 1000834. 长江大学石油工程学院湖北 武汉 430100) 
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中文摘要:
      塔河油田缝洞型油藏具有高温高盐、出水规律复杂等特点,普遍采收率较低。针对这一问题,通过填砂管 模型和二维可视化缝洞模型研究了超支化缓膨颗粒在塔河油田缝洞型油藏条件下的选择性堵水机理和流道调 整机理。研究结果表明,该缓膨颗粒具有优良的抗温抗盐性能、油水选择性和液流转向性能。缓膨颗粒在模拟 水中的最大膨胀倍数为14倍,堵水率66.7%,堵油率7.0%;可有效封堵高渗管,调剖后高渗管与低渗管的分流比 从98∶2降至23∶77。微观可视化物模实验结果表明,水化膨胀的弹性颗粒在大尺寸裂缝中通过挤压变形和堆积 压实作用形成卡封,从而调整流道促使深部液流转向,并通过逐级封堵和运移来实现后续水驱沿程扩大波及效 率,有利于提高缝洞型油藏采收率。图11参14
英文摘要:
      The fracture-vuggy reservoirs in Tahe oilfield are characterized by high temperature,high salt and complicated water production rules,so it is difficult to achieve higher recovery. Aiming at these problems,using sand filling pipe model and two-dimensional visual fractured-vuggy model,the selective blocking and flow channel adjustment mechanisms of hyperbranched slow-expanding particles were studied under Tahe fractured-vuggy reservoir conditions. The experimental results showed that the slow-expanding particles had excellent temperature and salt resistance,oil-water selectivity and fluid steering performance. The maximum expansion ratio of slow-expanding particle was 14 times in simulated water,the water blocking rate was 66.7% and the oil blocking rate was 7.0%. The high permeability pipe could be effectively blocked,and the split ratio of high permeability pipe to low permeability pipe reduced from 98∶2 to 23∶77 after profile control. The result of microscopic visualization model experiment showed that the expanded elastic particles could form a seal in the large-size fractures by extrusion deformation and accumulation compaction. It could narrow the flow channel to promote deep fluid steering,and expand the sweeping efficiency of subsequent water flooding through stepwise blocking and migration,which would benefit to improve the recovery of fracture-vuggy reservoir
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