摘要
针对长庆靖安低压、低渗油藏常规酸化返排较困难,易造成油层二次污染的问题,利用泡沫流体在地层的气阻叠加原理效应,封堵高渗层,改善产液剖面,增加低渗层的酸化效果。泡沫酸酸化工艺技术在靖安油田某作业区油藏现场实施4口油井,增产效果100%。泡沫酸酸化工艺实现了分层酸化,具有工艺简单、排酸彻底、处理半径大、对储层损害小、酸液有效距离长等特点。该技术对改造层间矛盾突出的低渗油藏低产液井具有很好的应用潜力。
Changqing Jing＇an for low-voltage, low permeability reservoir of conventional acid backflow difficult, easy to cause secondary pollution problems reservoir, using a bubble of fluid in the formation of air resistance effect of the superposition principle, off the high permeability layer, to improve the production profile, effect of increasing acidification of low permeability layer. Foam fracturing technology in a work area in Jing＇an Oilfield site implementation of the four wells, yield 100 %. Foam fracturing technology to achieve a layered acidification with simple technology and exclusive acid completely to deal with a large radius on the formation damage is small, the effective distance and long acid. The technology of the obvious contradiction between the transformation of low permeability layer of low-yielding liquid reservoir has a good potential wells.
出处
《石油化工应用》
CAS
2011年第10期24-26,33,共4页
Petrochemical Industry Application
关键词
泡沫酸
酸化工艺
气阻
应用
foam acid
acidification
air resistance
application
