水力喷射钻孔技术在静北潜山油藏的试验研究

Experimental study on jetting drilling technology in Jingbei buried hill reservoir

王文涛 胡胜勇

WANG Wentao HU Shengyong

辽河油田公司钻采工艺研究院，辽宁盘锦　124010

Drilling &

水力喷射钻孔技术采用自进式水力喷射钻头，利用软管送进并控制轨迹，以高压水射流钻孔的方式在油层与井筒间形成清洁孔道，实现百米穿越。介绍了该技术的工艺原理，结合试验区块的油藏储层特性进行了钻孔参数设计。采用?13 mm小直径连续管作业，在2713~2865 m井段的套管壁上，磨铣出6个?27 mm小孔，用?13 mm喷嘴对3个方位共完成了4条50 m、2条60 m水平孔道，施工压力55 MPa，施工排量1.2~1.5 m3/h，每孔施工时间近20 h，油管管柱采用?73 mm和?89 mm两级组合，完成潜山裂缝性碳酸盐岩高凝油油藏水力喷射钻孔现场试验并获得成功，增油幅度达367%，表明水力喷射钻孔在碳酸盐岩储层应用具有较好前景。

For jetting drilling technology, a kind of self-penetration bit is taken as the bit, and soft pipe is used to supply sources and control the trajectory. The clean flow path is formed by high pressure jetting between wellbore and reservoir, and it can reach 100 meters far. The technology mechanism was introduced, and the drilling parameters design was conducted regarding to the reservoir formation property of the pilot. Small diameter（?13 mm）coiled tubing was taken as the operation pipe. After milling 6 small holes on the casing wall between the depth of 2713 m and 2865 m, the ?13 mm jetting nozzle was used to make 4 horizontal flow paths with the length of 50 m and 2 horizontal flow paths with the length of 60 m. The treating pressure was 55 MPa, and the injection rate was 1.2~1.5 m3/h. The treating time for each hole was nearly 20 h. The oil tube consists of ?73 mm pipes and ?89 mm pipes. The test is the first domestic case of jetting drilling in buried hill fractured carbonate reservoir with high pour point crude. It is successful with oil production increasing ratio of 357%. The test proves the bright future of application of jetting drilling technology in carbonate reservoirs.