旋转冲击钻井工具在塔河油田12区块应用效果分析

Analysis on Application Effect of Rotary Percussive Drilling Tool in 12 Block of Tahe Oilfield

摘要:

简述了旋转冲击钻井工具的特点以及使用原理，其较以往其它提速工具不同之处是结合了机械冲击和水力脉冲破岩两方面的破岩能力。重点分析了该工具在塔河油田12区块使用后的提速提效对比情况以及不同地层的提速情况。目前该工具已经在塔河油田12区块多口井进行了使用，都取得了明显的效果，最低提速为25%，最高提速近45%。分析认为，该工具对于12区块哈拉哈塘组地层而言，提速效果不很理想；对于使用常规“PDC+螺杆”钻具组合可钻性较差，机械钻速不高的井段和地层钻速提高明显，原来钻速较低的井段，钻速提高越快，比如卡拉沙依组和东河塘组地层钻速提高明显很多，最高达到60%以上，一般也在30%以上；同时使用该提速工具后，钻时变得逐步均匀，每米钻时驱于平均，钻头的破岩能力均向化。

Abstract:

The paper briefly introduces the characteristics of rotary percussive drilling tool and the working principle, especially the combination of mechanical compact and hydraulic pulse excavating. The drilling efficiency comparison before and after the application of this tool in 12 block of Tahe oilfield and other different formations were analyzed. The tool was used in several wells of 12 block with efficiency increasing 25% at least to nearly 45%. Through the analysis, it was found that the efficiency increasing was not ideal in Halahatang formation of 12 block, but for those well sections and formations with poor drillability and low ROP by PDC screw drill assembly, the drilling efficiency was obviously improved. For example, the drilling efficiency in Kalashayi and Donghetang formations were improved up to more than 60% and generally above 30% with uniform drilling hour per meter and homogeneous rock breaking capacity.