用显微观测法评价泡沫钻井液的稳定性  

Stability Evaluation on Foam Drilling Fluid with Micrographic Methods

作　　者：蓝强[1] 张妍[1] 冯希忠[1] 张敬辉[1] 李公让[1] 刘宝峰[1] 乔军[1] 

机构地区：[1]胜利石油管理局钻井工艺研究院

出　　处：《钻井液与完井液》2010年第4期1-3,共3页Drilling Fluid & Completion Fluid

基　　金：国家重大办项目"低渗油气田高效开发钻井技术"课题"低渗透储层保护技术研究"(2008ZX05022-004)部分研究内容

摘　　要：针对当前泡沫钻井液稳定性评价方法的不足,建立了一种新的泡沫钻井液稳定性评价方法——显微观测法。对不同泡沫剂加量、不同时间对泡沫钻井液稳定性的影响进行了实验研究,并对泡沫在常温下的聚并行为进行了分析。结果表明,泡沫的数量随着泡沫剂加量的增大而减少,稳定泡沫直径集中在16μm附近;粒径相差较大的泡沫容易发生聚并;搅拌时间越长,泡沫钻井液的稳定性越好,在2h后基本达到稳定。A new evaluation method on the stability of foam drilling fluid, micrographic method, was set up in this paper. Laboratory experiments had been done to research the impact on foam drilling fluid stability by the foamer concentration and mixing time. Some experiments had been done to analyse the aggregation progress made of foams, and the results showed that the amounts of foam decrease when using more foaming agent, and the foam average diameter is about 16 μm. The foams are easy to aggregate with greater difference of the foam diameters, and the stability of the foam drilling fluid reaches best after two hours stirring.

关 键 词：欠平衡钻井 泡沫钻井液 显微观测 聚并机理 

分 类 号：TE254.1[石油与天然气工程—油气井工程]