钻井液与完井液2017，Vol.34Issue(5)：27-32,6.DOI:10.3969/j.issn.1001-5620.2017.05.005
水包油乳液型复合泥饼清除剂的室内研究
Laboratory Study on Oil in Water Compound Mud Cake Remover
摘要
Abstract
When fractured tight sandstone reservoirs are drilled with high density oil base drilling fluids, solid particles from drilling fluids invade the formation fractures, and mud cakes are formed on the surface of the borehole wall and the surface of the fractures. The solid particles and mud cakes are difficult to remove, causing formation damage to the reservoirs. A high efficiency, high temperature and cost effective oil-in-water compound mud cake remover has recently been developed to resolve these problems. The compound mud cake remover is composed of mixed acids, high temperature penetrant, cleaning agent and emulsifier etc. Comparison of a compound mud cake remover - O/W emulsion system and a mud cake remover - nano-emulsion system showed that compound mud cake remover is better than the nano-emulsion in cleaning oil and eroding mud cakes. The compound mud cake remover has good high temperature stability; it works well at temperatures as high as 120 ℃. At static conditions, 90％ mud cakes can be cleaned with the compound mud cake remover. At dynamic conditions, after removing mud cakes, formation permeability recovery of 89％ can be reached, and the optimum treatment time is 8 h. This compound mud cake remover has simple composition and good performance, it fast removes particles and mud cakes plugging flow channels, thereby effectively enhancing permeability recovery, especially when cost-cutting and efficiency-enhancing prevail presently.关键词
裂缝性气藏/油基钻井液/储层伤害/泥饼清除剂/渗透率恢复值Key words
Fractured gas reservoir/Oil base drilling fluid/Reservoir damage/Compound mud cake remover/formation permeability recovery分类
能源科技引用本文复制引用
艾正青,叶艳,李家学,周意程,刘举,张謦文..水包油乳液型复合泥饼清除剂的室内研究[J].钻井液与完井液,2017,34(5):27-32,6.基金项目
中石油科技创新基金"页岩气作业含油废物低能深度脱附机理及处理技术研究"(2015D-5006-0306) （2015D-5006-0306）
塔里木油田项目"克深 6 区块开发初期全过程储层保护技术研究"(20104120026). （20104120026）
