摘要
针对新疆油田环玛湖地区浅层地下水、稠油热采水、压裂返排液中存在多价金属离子(Ca^(2+)、Mg^(2+)、Fe^(3+)、Fe^(2+)),影响其配制的胍胶压裂液性能。通过模拟不同种类和浓度多价金属离子水溶液,分析多价金属离子对有机硼胍胶压裂液溶胀、交联及耐温耐剪切性能的影响规律,研究了NSA、EDTA、CA,3种络合剂对多价金属离子的屏蔽效果。研究表明,多价金属离子对有机硼胍胶压裂液影响程度依次为Fe^(2+)>Fe^(3+)>Mg^(2+)>Ca^(2+); 3种络合剂对Mg^(2+)屏蔽能力为CA>NSA>EDTA,对Ca^(2+)屏蔽能力为NSA>EDTA>CA,对Fe^(3+)屏蔽能力为EDTA>NSA。为不同水质配制有机硼胍胶压裂液选择络合剂提供了依据。
In this study, we investigate the influence of multivalent metal ions(such as Ca^2+, Mg^2+, Fe^3+, and Fe^2+) 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 Fe^2+>Fe^3+>Mg^2+>Ca^2+, and the order of shielding ability of the three complexing agents toward Mg^2+, Ca^2+, and Fe^3+are CA>NSA>EDTA, NSA>EDTA>CA,and EDTA>NSA, respectively.
作者
汪志臣
吕振虎
董景锋
张凤娟
周培尧
WANG Zhichen;Lü Zhenhu;DONG Jingfeng;ZHANG Fengjuan;ZHOU Peiyao(Engineering Research Institute, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang 834000, China)
出处
《西南石油大学学报(自然科学版)》
CAS
CSCD
北大核心
2019年第3期177-184,共8页
Journal of Southwest Petroleum University(Science & Technology Edition)
基金
国家科技重大专项(2016ZX05070)
关键词
有机硼胍胶压裂液
稠油热采水
多价金属离子
络合剂
屏蔽效果
organic borate-crosslinked guanidine gum fracturing fluid
heavy oil thermal recovery-produced water
multivalent metal ions
complexing agents
shielding effect