水力喷砂割缝技术的研究与应用

随着油田的不断开发，油水井近井地带的地层性质不断变化，造成油气压力下降和污染堵塞等问题，阻碍了油水的流动，导致产量下降。水力喷砂割缝技术能够深穿透近井压实带，增大压实带的渗透率，并且对套管和水泥环损害很小，是一种高性价比的完井及油层改造措施。对水力喷砂割缝工具进行了改进，将钢球收集器省去，从而节省了空间增大了割缝长度。针对溢流阀研制了专用测试装置，确保水力喷砂割缝工具的最佳使用效果和施工成效。利用实验手段对砂比、泵压、移动速度和喷嘴直径等参数进行了优化。现场应用证实，采用优化的参数和水力喷砂割缝技术后．施工成功率达到100％，采油井日产油量平均增加了3．6倍，注水井的配注量达到了100％。

Research and application of hydraulic sandblasting slotting technology.

With the production of the oilfield,various alternations at the im- mediate vicinity of the oil and water wells initiates a series of problems such as the decrease of the pressure of the oil and gas, pollution and jam and so on.These block the flowing abilities of the oil and water and cause the decline of the production.Hy- draulic sandblasting slotting technology can breakthrough the skin nearby wells deeply and increase the permeability of the compaction zones,meanwhile can effectively reduce the damage ...