超深大底水碎屑岩水平井复合堵水技术

Composite Water Shutoff Technology for Horizontal Wells of Ultra-deep Clastic Reservoir With Bottom Water

针对塔河油田碎屑岩油藏水平井多轮次堵水后,油井潜力变小,堵水单井增油减少,堵水有效率呈下降趋势的问题,提出了适合塔河油田超深大底水碎屑岩油藏条件的复合堵水增效技术。该技术是通过工艺上不同类型堵剂组合、不同强度段塞组合、堵剂用量和强度的增加,达到延缓多轮次堵水效果逐次递减趋势的作用。利用该技术研究成果在塔河油田TK107H井进行复合堵水现场试验,工艺上获得成功的同时取得了一定的增油效果。

For horizontal wells of Clastic reservoirs in Tahe oilfield after multi-round water shutoff, wells potential became smaller, increase of oil rate of single-well by water shutoff decreased, and the water shutoff efficient declined. In this paper, composite water shutoff efficiency technology for ultra-deep clastic reservoirs with bottom water in Tahe oilfield was presented. The technology is a combination of different types of plugging agents, plugging agent slug with different intensity, and to increase the intensity and amount of plugging agents. It can decrease gradually decreasing trend of multi-round shutoffeffect. The field test in Tahe oilfield TK107H well has gained success, and certain stimulation effect has been achieved.