FIELD: oil and gas industry, particularly flowing well killing for underground repair and overhaul performing.;SUBSTANCE: method involves blocking perforation interval and part of well bottom zone by replacing well fluid with blocking fluid and killing liquid arranged over the blocking one. Free gas is removed from well before blocking fluid delivery to well bottom. Necessary liquid level at well head is provided by well operation stoppage for a certain time, which provides termination of formation fluid degassing in well bore and free gas lifting to well head. Tube space and hole annuity is filled with liquid in several steps along with discharge of gas portions. Gas portion discharge may not result in formation fluid rise inside well bore to level of formation fluid degassing. Density of liquid to be added in tube space and hole annuity provides well filling to head thereof. Well killing liquid comprises industrial magnesium chloride, alkali or alkaline-earth metal hydrate, alkali metal carbonate and pore sealant, for instance cacao-bean pods and fresh water taken in predetermined ratio.;EFFECT: increased efficiency, possibility to kill wells characterized by abnormally high permeability of production bed and high gas factor.;2 cl, 1 ex
展开▼
机译:领域:石油和天然气工业,尤其是用于井下维修和大修的流动压井技术;实质:该方法涉及通过用压井液代替井眼流体并压排布置在压井井眼上方的压井液来阻塞射孔间隔和部分井底区域。在阻止流体输送到井底之前,先从井中除去游离气体。井口停止运行一定时间可提供井口所需的液位,从而可终止地层流体在井筒中的除气并释放自由气至井口。管空间和孔的年金会随着气体部分的排出分几步充满液体。气体部分的排放可能不会导致地层流体在井筒内上升到地层流体脱气水平。待添加到管空间中的液体的密度和孔的年金值可以很好地填充其头部。压井液包括工业氯化镁,碱金属或碱土金属水合物,碱金属碳酸盐和孔隙封闭剂,例如可可豆荚和预定比例的淡水;效果:效率提高,有可能以异常方式压井高产层渗透率和高气体因子。; 2 cl,1 ex
展开▼