Influence of Multivalent Metal Ions on Organic Borate-crosslinked Guanidine Gum Fracturing Gluids: Analysis and Countermeasures

doi:10.11885/j.issn.1674-5086.2018.08.12.03

Abstract

Abstract: In this study, we investigate the influence of multivalent metal ions (such as Ca²⁺, Mg²⁺, Fe³⁺, and Fe²⁺) present in shallow groundwater, heavy oil thermal recovery-produced water, and fracturing flowback fluids in the periphery of the Mahu oilfield in Xinjiang, on the performance of organic borate-crosslinked guanidine gum fracturing fluids. Through the simulations of aqueous solutions containing different types and concentrations of multivalent metal ions, the influence patterns of multivalent metal ions on the swelling, crosslinking, thermal resistance, and shear resistance properties of organic boratecrosslinked guanidine gum fracturing fluids were analyzed. Furthermore, the shielding effects of three complexing agents (NSA, EDTA, and CA) toward various multivalent metal ions were investigated. The results indicated that the order of influence of the various multivalent metal ions on organic borate-crosslinked guanidine gum fracturing fluids is Fe²⁺ > Fe³⁺ > Mg²⁺ > Ca²⁺, and the order of shielding ability of the three complexing agents toward Mg²⁺, Ca²⁺, and Fe³⁺ are CA > NSA > EDTA, NSA > EDTA > CA, and EDTA>NSA, respectively.

Key words: organic borate-crosslinked guanidine gum fracturing fluid, heavy oil thermal recovery-produced water, multivalent metal ions, complexing agents, shielding effect

CLC Number:

TE357.12

WANG Zhichen, LÜ Zhenhu, DONG Jingfeng, ZHANG Fengjuan, ZHOU Peiyao. Influence of Multivalent Metal Ions on Organic Borate-crosslinked Guanidine Gum Fracturing Gluids: Analysis and Countermeasures[J]. 西南石油大学学报(自然科学版), 2019, 41(3): 177-184.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2018.08.12.03

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2019/V41/I3/177

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