申请人:——
公开号:US20020125012A1
公开(公告)日:2002-09-12
A well treatment fluid composition comprises a solvent (such as water), a polymer soluble or hydratable in the solvent, a crosslinking agent, an inorganic breaking agent, and an ester compound. Preferably, the hydratable polymer is a polysaccharide, such as galactomannan, cellulose, or derivatives thereof. The crosslinking agent is preferably a borate, titanate, or zirconium-containing compound. The inorganic breaking agent is preferably a metal-based oxidizing agent, such as an alkaline earth metal or transition metal-based oxidizing agent. The ester compound is preferably an ester of polycarboxylic acid, such as an ester of oxalate, citrate, or ethylenediamine tetraacetate. One example of a suitable ester compound is acetyl triethyl citrate.
油井处理液组合物包括溶剂(如水)、可溶于溶剂或可在溶剂中水合的聚合物、交联剂、无机破碎剂和酯类化合物。可水合的聚合物最好是多糖,例如半乳甘露聚糖、纤维素或其衍生物。交联剂最好是硼酸盐、钛酸盐或含锆化合物。无机破碎剂最好是金属基氧化剂,如碱土金属或过渡金属基氧化剂。酯类化合物最好是聚羧酸酯,如草酸酯、柠檬酸酯或乙二胺四乙酸酯。乙酰柠檬酸三乙酯就是一种合适的酯化合物。