海上油田中后期钻完井增产技术研究

Research on drilling and completion stimulation technology in the middle and late stages of offshore oilfield

为提高海上油田中后期油气采收率,分析了海上油田在生产中后期存在的主要矛盾,研究了主流钻完井增产技术的原理及适用性。结果表明,海上油田在步入生产中后期之后,受井槽、技术和经济等的制约,油气产量不及预期,需通过适当的增产手段延长油井的使用年限,从而增加原油采收率;合理地选择并采取井槽高效利用技术、多分支井技术、水利喷射压裂技术、大位移井技术、酸化压裂技术、气举技术等增产技术,可实现海上油田中后期增产稳产的目的。

In order to improve the oil and gas recovery in the middle and late stages of offshore oilfields,this paper analyzes the main contradictions existing in the middle and late stages of offshore oilfields,and studies the principles and applicability of mainstream drilling and completion stimulation technologies.The results show that after the offshore oilfield enters the middle and late stage of production,the oil and gas production is less than expected due to the constraints of well groove,technology and economy,and it is necessary to extend the service life of the oil well through appropriate stimulation methods,so as to increase the oil recovery.Reasonable selection and adoption of highefficiency utilization technology of well groove,multi-lateral well technology,hydraulic jet fracturing technology,extended-reach well technology,acidizing fracturing technology,gas lift technology and other stimulation technologies can achieve the purpose of increasing production and stabilizing production in the middle and late stages of offshore oilfields..