海上X油田水平井智能分采管柱卡堵水潜力井筛选及应用效果分析

水平井高含水治理是水驱油田开发中后期面临的主要难题。海上X油田水平井高含水治理措施难度大、费用高，而智能分采管柱卡堵水技术由于其成本低、作业简单、风险小等特点，适合于海上油田进行水平井卡堵水试验。通过分析X油田油井完井方式、目前含水状况、累产油量、储层非均质性和见水时间等因素，确定出X油田“水淹”井剩余油潜力大小及工程条件可实施性，最终筛选出5口具备水平井智能分采管柱卡堵水潜力的试验备选井，并依据1口井的卡堵水实例进行实施效果分析，结果表明利用智能分采管柱进行大段“找水、堵水”现场应用效果较好，值得进一步推广应用，为后期油田“控水、增油”提供技术借鉴。

Selection of potential wells for water plugging by using intelligent separate-production strings in horizontal wells in X offshore oilfield and its application effect

The main difficulty of water flooding oilfields in the middle and late stages is to treat the high water cut of horizontal wells. In X offshore oilfield, however, the treatment of high water cut is difficult and the cost is high. Water plugging technology based on intelligent separate-production string are characterized by low cost, convenient operation and low risk, so it is suitable for water plugging of horizontal wells in offshore oilfields. In this paper, the remaining oil potential of watered out wells in X oilfield and the technical practicability of water plugging were determined by analyzing completion mode, current water cut, cumulative oil production, reservoir heterogeneity and water breakthrough time. And finally 5 candidate wells were selected for water plugging test because of their potential of water plugging with intelligent separate-production strings. Then, the implementation results of water plugging in one well were analyzed. The results show that the intelligent separate-production string is remarkable in water searching & plugging of large sections, should be popularized and applied further. It provides the technical instruction for water control and oil production improvement of oilfields at the late stage of development.