延长油田L井区空气泡沫驱效果评价

延长油田L井区经过注水开发后,出现受效井数少、单井产量低,部分井水淹严重等问题,于是对部分井组实施了空气泡沫驱。以研究区典型井组为研究对象,对比空气泡沫驱前后产油量、含水率等参数的变化,评价受益井以及受益程度。结果显示,实施空气泡沫驱后油井降水效果非常明显,增油略有成效。这表明空气泡沫驱对于低渗透油藏而言是水驱之后的一种选择,能够在水驱基础上提高驱油效果。

Evaluation of Air Foam Flooding Effect in L Well Area of Yangchang Oilfield

After waterflooding in L well area of Yanchang Oilfield,there are some problems,such as few effective wells,low production of single crystal wells and serious water follding in some wells,so air foam flooding is carried out in some well groups.Taking the typical well groups in the study area as the research object,this paper compares the changes of oil production,water cut and other paramaters before and after air foarn flooding,and evaluates the benefit wells and the benefit degree.The results show that the dewatering effect of oil wells after air foam flooding is very obvious,and the oil increase is slightly effective.This shows that air foam flooding is a choice after water flooding for low permeability reservoivs,which can improve the oil displacement effect on the basis of water flooding.