稠油在开采过程中存在粘度大、流动性差等问题,常规钻井易对储层造成伤害。针对氮气欠平衡钻完井技术具有降低稠油粘度,提高稠油流动性、对钻具腐蚀小、储层伤害小等优点,结合玉门油田鸭儿峡区块和吐哈油田西峡沟区块稠油油藏氮气钻井实例,对氮气欠平衡技术在稠油油藏钻完井中的适用性进行论述,展现了良好的应用前景。 Heavy oil in the mining process exists viscosity, poor fluidity and other issues, conventional drilling easy to damage the reservoir. The nitrogen underbalanced drilling and completion technology has the advantages of reducing the viscous viscosity of heavy oil, improving the flowability of heavy oil, small corrosion to drilling tools and small damage to the reservoir. Combined with the Duerxia Gorge block in Yumen Oilfield and Xixiagou District Block heavy oil reservoirs nitrogen drilling case, the nitrogen underbalanced technology in the drilling of heavy oil reservoir in the applicability discussed, showing a good prospect.