DESIGN OF ACIDIZING FLUID FORMULA ON RE-TARDING ACIDIZING TREATMENT IN SANDSTONE

doi:10.3863/j.issn.1000-2634.2000.02.21

Abstract

Abstract:

A retarded acid system has been presented which can be used in sandstone formation. It consists of an organic acid and its ammonium salt, a phosphoric acid and an ammonium fluoride. Results have showed that this acidizing fluid has low reaction rate when reacting with quartz sand, carbonates and clay minerals compared with mud acid. It has good retarding effects especially in sandstone formation where high clay content exists. In addition, the framework of sandstone has not been destroyed after treatment and some metallic ion such as Fe³⁺ and Al³⁺ can be tied up so that the secondary precipitation will not occur.

Key words: acidizing, retarded acid, sandstone, stimulation, formation damage

CLC Number:

TE39

HUANG Zhi-yu HE Yan JI Shu-mei. DESIGN OF ACIDIZING FLUID FORMULA ON RE-TARDING ACIDIZING TREATMENT IN SANDSTONE[J]. 西南石油大学学报(自然科学版), 2000, 22(2): 67-69.

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http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2000/V22/I2/67

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DESIGN OF ACIDIZING FLUID FORMULA ON RE-TARDING ACIDIZING TREATMENT IN SANDSTONE

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