摘要
针对塔河油田注氮气吞吐采油过程中因施工压力高(井口注气压力设计大于50 MPa),给注气井口及注气管柱设计带来的技术难题,研究设计了耐高压、气密性好、能够实现注气、生产一体化的注采一体化井口及注采一体化管柱,满足了超深井高压安全注气和注气后不作业直接转抽生产的双重要求。大幅降低了施工作业成本,减少了因作业对储层造成的二次伤害。目前,现场已经推广使用28口井,全部安全无故障,取得显著效益。
[ Abstract ] In the light of the technological problems of designing gas injection wellhead and gas injection pipe string brought by high construction pressure （wellhead gas injection design pressure more than 50 MPa）during the injection of nitrogen stimulation process in Tahe oilfield, injection-production integration wellhead and pipe string was designed which have high pressure resistance, good air tightness, also can realize the integration of gas injection and production. It can satisfy the dual requirements of safety high-pressure gas injection of ultra-deep well and directly product without downhole operation after gas injection, which greatly reduce the construction cost and secondary damage to reservoir. At present, this method have been used in 28 wells which are all no fault, and have achieved significant benefits.
出处
《科学技术与工程》
北大核心
2014年第23期188-190,195,共4页
Science Technology and Engineering
关键词
超深
缝洞型油藏
氮气吞吐
注采一体化
ultra-deep well
fracture-cavity reservoir
nitrogen stimulation
injection-production integration
