低产液量水平井找堵水管柱的设计与应用

针对长庆油田致密油藏低产液量水平井利用现有测试方法无法准确找到出水层的情况，设计了适用于不同地层压力的低产液量水平井找水测试管柱，同时针对不同出水位置设计了桥塞卡堵水管柱和封隔器卡堵水管柱。低产液量水平井找水测试管柱在长庆油田应用21井次，找水有效率96.7%；两种卡堵水管柱堵水在长庆油田应用22井次，堵水成功率达到81.8%。这表明，利用所设计的低产液量水平井找水测试管柱，能准确找出低产液量水平井的出水层段，所设计的卡堵水管柱能对不同位置的出水层段进行机械封堵。 

Design and Application of Water Detecting and Plugging Pipe String for Low Production Horizontal Wells

In viewing the problem that existingent test methods can’t accurately detect water production layers in low production horizontal wells in the tight reservoirs of Changqing Oilfield,water production detection strings for low production horizontal wells have been designed for different formation pressures as well as bridge plug and packer plugging string according to the different water production section.Two kinds of water test strings have been applied in 21 wells,and two kinds of water plugging strings for low production horizontal wells have been applied in 22 wells in Changqing Oilfield,with a water layer identification efficiency of 96.7% and the successful water plugging rate of 81.8%.This showed that water test string could accurately identify watered production layers,and water plugging string could effectively perform water plugging at different water production secion in low production horizontal wells.