者水调剖在杏南特低渗裂缝——孔隙储层的应用  

Application of water plugging and profile control to extra-low permeability fractured-pore reservoirs of Xinghe South Block

作　　者：吕旭[1] 李伶东[1] 王小平[1] 李堪运[1] 

机构地区：[1]中国石油长庆油田分公司第一采油厂

出　　处：《低渗透油气田》2016年第1期125-127,共3页

摘　　要：安塞油田杏南区块发育特低渗透裂缝——孔隙型砂岩储层。优选交联聚合物、钠土聚合物、预交联颗粒和固结型颗粒组成的调剖体系，分别处理深部地层、中部地层、近井地层。先对注水井泄压、检串和冲砂洗井，然后下笼统管柱实施堵水调剖．在注清水井和采出水回注井分别实施5口。实施效果表明：对于泄压量较大、裂缝渗流特征明显的清水注水井，增加固结型颗粒的封口段塞，可有效封堵近井地层裂缝，增产效果显著：对于泄压量小、裂缝渗流特征不明显的采出水回注井．取消固结型颗粒的封口段塞．可减少近井地层伤害．增产效果良好。There were extra-low permeability fracture-pore type sandstone reservoirs developed in the Xinghe South Block of Ausai Oilfield. A profile control system that is comprised of cross-linked polymer, sudium bentonite polymer, pre-crosslinked particles, and consolidation-type particles is selected to respectively treat the far, middle, and near wellbore formations. First, bleed off the pressure of the injectors, inspect the tubing aud easing strings, antt clean out the wells （well flushing by cleaning out tire sands）. Then lay down tire general casing strings to implement water pluggiug and profile controh The water plugging aud profile control were implemented io five clean water injectors and five produced-water reinjeetion wells respectively. The implementation results show that, for clear water injectors with a large amount of pressure release, and obvious percolation characteristics of fractures, to increase the sealing slugs of the consolidation-type particles can effectively block the near-wellbore fractures, with significant resuhs of increasing production rate. For the pruduced-water reinjectiou wells with a small amount of pressure release, and unobvious percolation characteristics of fractures, to cancel the sealing slugs of the consolidation-type particles can reduce near-wellburc formation damage, with good results of increasing production rate.

关 键 词：杏南区块 特低渗 裂缝——孔隙储层 堵水调剖 泄压 笼统管柱 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]