大港油田高含水油层分层酸化工艺研究与应用  

RESEARCH AND APPLICATION OF LAYERING ACIDIFICATION TECHNOLOGY IN HIGH WATER CUT FORMATION IN DAGANG OILFIELD

作　　者：王洪斌[1] 赵永杰[1] 刘立稳[1] 吕选鹏[1] 喻彬[1] 

机构地区：[1]大港油田井下作业公司

出　　处：《钻采工艺》2006年第5期133-134,136,共3页Drilling & Production Technology

基　　金：中国石油大港油田南部油田注水井改选项目部分研究成果(编号:2005科-29)。

摘　　要：大港油田经过多年的注水开发已经进入高含水期,一些主力油层层间层内矛盾突出,同时,各小层渗透率级差大,低渗透层的油难以采出。为此,针对油层具体的岩性特征,进行了大量的酸液添加剂优选和配方评价,优选出一套适合该油层的低伤害土酸配方,并采用分层酸化工艺技术使酸液分流进入低渗透层或伤害严重层,达到了均匀布酸、定向改善目的层的渗透率,提高酸化增产效果。通过现场8井次的成功应用,表明了这套分层酸化工艺具有良好的增产增注效果,值得推广应用。After injection development for years, Dagang oilfield turn into high water cut period. There are prominent inconsistency and different coefficient of permeability among some mainly production layer. Oil is very difficult to recover out from the low permeable formation. According to specific lithologic characteristic, we have selected a set of low damaged mud acid preparation and taken layering acidification technology to divert mud acid into low permeable formation and severe damaged production formation to get improved subject reservoir, enhanced the acidification effect. Through successful application in 8 wells, it is indicated the layering acidification technology can increase production and injection, it is worth popularizing and applying.

关 键 词：高含水 酸液 大跨度 分层 酸化工艺 均匀布酸 分流 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]