耐高盐高强度膜屏蔽剂的研制与性能评价  

Research on High Salt-resisting and High Strength Membrane Shield Agent

作　　者：刘晓栋[1] 

机构地区：[1]中国石油集团工程技术研究院

出　　处：《钻井液与完井液》2011年第3期12-15,91-92,共4页Drilling Fluid & Completion Fluid

摘　　要：基于膜屏蔽暂堵理论,用抗高温、抗盐阳离子成膜聚合物和具有超强封堵效果的微米级纤维素、超细碳酸钙等材料复配研制出膜屏蔽剂BXP-2,介绍了BXP-2的研制方法和作用机理。室内评价结果表明,BXP-2在高浓度、高价金属盐溶液中具有提高黏度和切力、降滤失的作用,当其浓度高于2%时,溶液切力即可满足悬浮钻屑的需要,非常适宜于各种盐水、饱和盐水钻井液的配制;BXP-2的成膜强度高,膜弹性模量在1 500 Pa以上,其泥饼的抗冲刷能力强,能封堵砂粒粒径小于0.9 mm的石英砂床;BXP-2的含量达到3.0%时,膜屏蔽钻井液的结构力升高,能减少共沉降中钻屑的含量,能防止钻井液静止时钻屑沉降、堆积卡钻。经现场应用100余口井表明,BXP-2钻井液抑制性强,能防止井壁坍塌,保护油气层,综合效果好。A membrane shield agent,BXP-2,is developed by high salt-resisting polymer,micro-sized cellulose and ultrafine calcium carbonate.The laboratory evaluation results show that BXP-2 can improve the viscosity and yield point and reduce filtration in high salt concentration solution.With the concentration of 2%,the yield point of BXP-2 solution can meet the demand of carrying cuttings which can be used in salt or saturated salt drilling fluid.The membrane elastic modulus is more than 1,500 Pa,and it can effectively plug the quartz sand bed less than 0.9 mm.When the concentration reaches to 3%,it can effectively prevent the cuttings settlement,accumulation,and pipe sticking.The applications of more than 100 wells show that it has good performances of strong inhibition,hole stabilization and reservoir protection.

关 键 词：防止油层损害 临时性封堵 井眼稳定 膜屏蔽剂 封堵 

分 类 号：TE254.4[石油与天然气工程—油气井工程] TE258