摘要
介绍了供塔里木奥陶系地层酸化压裂用的酸液性能,考察了各组分对酸液的腐蚀性、酸岩反应性、乳化性和返排性的影响,对新型酸液复合添加剂SD1-7的性能进行了评定。试验结果表明,本文推荐的酸液腐蚀性弱,与岩石的反应速度小,残酸液表面张力低,施工效果良好。
The ordovician oil reservior of Talimu region in South Xinjiang is consisting mainly of limestone or dolomite and featured by geological complexities and high well tempera- tures(up to ～120℃).To perform aeidizing of such reservior some acidizing fluids and a multifunctional additive for them,SD 1-7,are developed.A typical formulation is recommended as follows:15—28%-hydrochloric acid+1.0—3.0% corrosion inhibitor CT 1-2+1.0—2.0% SD 1-7,local surface water is used for their preparation.SD 1-7 is a mixture of cationic and nonionie surfactants,a cationic polymeric compound,and a ferroferric ion stabilizer and performs in acidizing fluids simultaneously the functions of anti and defoamer,retarder,corrosion and Fe-scaling inhibitors,etc.The results of laboratory tests show that the corrosion rate of N80 steel specimens in the formulated acidizing fluids at 120℃ is low(≤33.6g/m^2·hr),their reaction with marble and different cores is significantly retarded,their emulsions formed with crude oil themselves undergo breaking-down at standing,the surface tension of the acid residue is fair low.The recommended acidizing fluids have been used in some 20 wells in Talimu region with successes.
出处
《油田化学》
CAS
CSCD
北大核心
1992年第1期19-25,共7页
Oilfield Chemistry
关键词
多功能
酸液
添加剂
酸化液
Acidizing Fluids
Multifunctional Additive for Acidizing Fluids
Performance Evaluation
Acidizing
Talimu Region
