冲砂洗井泡沫流体研制及性能评价  

Development and performance evaluation of foam fluids for sand washing

作　　者：万里平[1] 何保生 李玉光 唐洪明[1] 周华 

机构地区：[1]西南石油大学,四川成都610500 [2]中海油研究总院,北京100027 [3]中油新疆油田分公司,新疆克拉玛依839100

出　　处：《特种油气藏》2011年第4期105-107,140-141,共3页Special Oil & Gas Reservoirs

基　　金：国家重大科技专项"大型油气田及煤层气开发"(2008ZX05024-003-04);国家自然科学基金项目"气体钻井腐蚀/冲蚀规律研究"(50974106)

摘　　要：中国海上油田稠油水平井地层压力低,漏失量大,油砂胶结强。长期使用常规冲砂介质易导致海水进入地层,严重时会全部进入油层而不能上返,导致冲砂作业失败。为解决这一开采问题,以N-烷基-β-氨基丙酸型两性表面活性剂为主剂,研制出适用于冲砂洗井的稳定泡沫,并探讨了NaC l加量、煤油含量、温度、pH值对泡沫性能的影响,进行了室内循环实验。循环实验结果表明,该泡沫经九次循环仍具有一定的发泡能力,可顺利完成冲砂作业和循环利用,具有广阔的应用前景。Horizontal producers of offshore heavy oil in China are characterized by low formation pressure,big circulation loss and strong oil sand consolidation.Using conventional sand washing media for a long time is likely to lead sea water into the reservoirs,or even without return,resulting in sand washing failure.To solve the problem,a stable foam has been developed for sand washing using N-alkyl-β-aminopropionate amphoteric surfactant as the main agent.The effects of NaCl concentration,kerosene content,temperature and pH value on foam performance have been discussed,and laboratory circulation tests have been conducted.The test results indicate that this foam still has certain foamability after nine cycles,can successfully carry out sand washing operation and be recycled,showing broad application prospects.

关 键 词：泡沫 循环利用 冲砂 洗井 两性表面活性剂 

分 类 号：TE53[石油与天然气工程—油气田开发工程]