CT高温转向酸的研制及应用  

Development and Application of CT High Temperature Self-Diverting Acid

作　　者：刘友权[1] 王小红[1] 王川[1] 毛小平[2] 张曲[3] 廖军[4] 冯莹莹[1] 

机构地区：[1]中国石油西南油气田公司天然气研究院 [2]中国石油西南油气田公司川东北气矿 [3]中国石油西南油气田公司勘探事业部 [4]中国石油西南油气田公司重庆气矿

出　　处：《石油与天然气化工》2011年第6期614-615,624,共3页Chemical engineering of oil & gas

摘　　要：介绍了一种适用于高温深井、长井段厚层井均匀酸化的CT高温转向酸。该酸液通过降低转向剂杂质含量、提高产品纯度,提高了酸液体系的耐温性及转向性能,使用温度提高到150℃,酸液从接触岩石到反应至酸液浓度5%均为粘弹体;150℃下即使渗透率倍数高达40倍,仍能变粘封堵转向,对低渗透储层实施改造;残酸自动破胶,粘度均在5mPa.s以下。CT高温转向酸在龙岗构造的长兴组、飞仙关高温储层进行了12井次现场应用,取得了显著的施工效果,平均单井次产量达47×104 m3/d。A novel CT self-diverting acid system,applied to acidize uniformly the high temperature/deep burial well and long reservoir interval well,is introduced.Through reducing the impurity content and enhancing the product purity,the acid system's temperature resistance and diversion behavior are increased;the application temperature can reach 150℃,the viscoelasticity can be formed when the acid contacting rock until the acid concentration depressed to 5%.At 150℃,even if the permeability multiples are as high as 40 times,the acid can change the viscosity to block the high permeability zones and to reform the low permeability zones;the used acid can break themselves and the viscosity is below 5 mPa·s.CT self-diverting acid system had been successfully applied in more than 12 wells in Longgang Structure and Feixianguan,the average single well production reached 470×103 m3/d.

关 键 词：高温 转向酸 转向性能 现场应用 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]